You searched for:
Subject term
developmental stages
Remove constraint Subject term: developmental stages
Subject term
crops
Remove constraint Subject term: crops
Subject term
corn
Remove constraint Subject term: corn
PubAg
Main content area
Limit your search
Search
156 Search Results
« Previous |
1 - 50 of 156
|
Next »
Search Results
- Author:
- Dimitris Zermas; Vassilios Morellas; David Mulla; Nikos Papanikolopoulos
- Source:
- Computers and electronics in agriculture 2020 v.172 pp. 105047
- ISSN:
- 0168-1699
- Subject:
- Zea mays; automation; cameras; canopy; corn; corn stover; crops; data collection; developmental stages; industry; leaf area index; leaf length; leaves; models; phenotype; plant height; statistics; stems; unmanned aerial vehicles
- Abstract:
- ... High resolution RGB imagery collected using a UAV and a handheld camera was used with structure from motion to reconstruct 3D canopies of small groups of corn plants. A methodology for the automated extraction of phenotypic characteristics of individual plants is presented based on these 3D reconstructed canopies. Such information can enhance the evaluation of crop traits and provide accurate and ...
- DOI:
- 10.1016/j.compag.2019.105047
- https://doi.org/10.1016/j.compag.2019.105047
- Author:
- Gary E. Varvel; James S. Schepers; Dennis D. Francis
- Source:
- Soil Science Society of America journal 1997 v.61 no.4 pp. 1233-1239
- ISSN:
- 0361-5995
- Subject:
- Zea mays; chlorophyll; corn; crops; developmental stages; fertilizer application; fertilizer requirements; groundwater; groundwater contamination; irrigated farming; irrigation; leaching; monitoring; nitrate nitrogen; nitrogen; nitrogen fertilizers; nutrient use efficiency; soil; United States
- Abstract:
- ... Nitrate-nitrogen contamination of groundwater continues to be a major concern throughout the USA. These concerns are greatest in areas where groundwater is close to the soil surface and in areas that have irrigated crops with large N fertilizer requirements. Specific objectives of this work were to use the chlorophyll meter to determine in-season crop N status and to correct in-season N deficienci ...
- DOI:
- 10.2136/sssaj1997.03615995006100040032x
- https://doi.org/10.2136/sssaj1997.03615995006100040032x
- Author:
- Ma. Carmelita R. Alberto; James R. Quilty; Roland J. Buresh; Reiner Wassmann; Sam Haidar; Teodoro Q. Correa; Joseph M. Sandro
- Source:
- Agricultural water management 2014 v.136 pp. 1-12
- ISSN:
- 0378-3774
- Subject:
- corn; crop coefficient; crop production; crops; developmental stages; dry season; eddy covariance; evaporation; evapotranspiration; growing season; hybrids; irrigation scheduling; irrigation water; rice; sprinkler irrigation; transpiration
- Abstract:
- ... In lieu of the decreasing availability of water for irrigated rice, we examined two alternatives to traditional rice cultivation on puddled and saturated soil–maize and dry-seeded rice production grown with an overhead sprinkler irrigation system. We characterized the inter-seasonal daily variations of actual crop evapotranspiration (ET), transpiration (T), and evaporation (E) using the eddy covar ...
- DOI:
- 10.1016/j.agwat.2014.01.005
- https://doi.org/10.1016/j.agwat.2014.01.005
- Author:
- Dixit, P.N.; Cooper, P.J.M.; Dimes, J.; Rao, K.P.
- Source:
- Experimental agriculture 2011 v.47 no.2 pp. 317-338
- ISSN:
- 0014-4797
- Subject:
- developmental stages; crop yield; seasonal variation; plant response; risk; meteorological data; weed control; production technology; rainfed farming; risk assessment; planting; climate models; case studies; climate; simulation models; water management; corn; soil water; temperature; nitrogen; farmers; fertilizers; rain; food production; crops; Kenya
- Abstract:
- ... In sub-Saharan Africa (SSA), rainfed agriculture is the dominant source of food production. Over the past 50 years much agronomic crop research has been undertaken, and the results of such work are used in formulating recommendations for farmers. However, since rainfall is highly variable across seasons the outcomes of such research will depend upon the rainfall characteristics of the seasons duri ...
- DOI:
- 10.1017/S0014479710000773
- https://doi.org/10.1017/S0014479710000773
- Author:
- Andrew J. Robinson; Muluneh Tamiru; Rachel Salby; Clayton Bolitho; Andrew Williams; Simon Huggard; Eva Fisch; Kathryn Unsworth; James Whelan; Mathew G. Lewsey
- Source:
- BMC plant biology 2018 v.18 no.1 pp. 200
- ISSN:
- 1471-2229
- Subject:
- Arabidopsis; barley; bioinformatics; cooperative research; corn; crops; data collection; databases; developmental stages; experts; genes; genomics; rice; sequence analysis; tissues; tomatoes; transcriptome; wheat
- Abstract:
- ... BACKGROUND: The genome-wide expression profile of genes in different tissues/cell types and developmental stages is a vital component of many functional genomic studies. Transcriptome data obtained by RNA-sequencing (RNA-Seq) is often deposited in public databases that are made available via data portals. Data visualization is one of the first steps in assessment and hypothesis generation. However ...
- DOI:
- 10.1186/s12870-018-1406-2
- PubMed:
- 30231853
- PubMed Central:
- PMC6146512
- https://doi.org/10.1186/s12870-018-1406-2
- Author:
- A. M. Atia; A. P. Mallarino
- Source:
- Soil Science Society of America journal 2002 v.66 no.5 pp. 1696-1705
- ISSN:
- 0361-5995
- Subject:
- Glycine max; Sus scrofa; Zea mays; anion exchange resins; bioavailability; corn; crops; developmental stages; farmers; iron oxides; liquid manure; phosphorus; pig manure; soil; soybeans; swine; uncertainty; Iowa
- Abstract:
- ... There is uncertainty concerning evaluation of bioavailable P in manured soils. This study assessed P availability in manured Iowa soils by measuring soil P with agronomic and environmental P tests and P uptake by corn (Zea mays L.) and soybean [Glycine max (L.) Merr.]. Soil and plant samples were collected at the V5-V6 growth stage from trials established at nine locations that received various ra ...
- DOI:
- 10.2136/sssaj2002.1696
- https://doi.org/10.2136/sssaj2002.1696
- Author:
- Huan Wang; Qi‐Wen Niu; Hui‐Wen Wu; Jun Liu; Jian Ye; Niu Yu; Nam‐Hai Chua
- Source:
- plant journal 2015 v.84 no.2 pp. 404-416
- ISSN:
- 0960-7412
- Subject:
- corn; crops; developmental stages; epigenetics; eukaryotic cells; genes; genome-wide association study; non-coding RNA; rice; single nucleotide polymorphism; stress response; transcriptome
- Abstract:
- ... Long non‐coding RNAs (lncRNAs) have recently been found to widely exist in eukaryotes and play important roles in key biological processes. To extend our knowledge of lncRNAs in crop plants we performed both non‐directional and strand‐specific RNA‐sequencing experiments to profile non‐coding transcriptomes of various rice and maize organs at different developmental stages. Analysis of more than 3 ...
- DOI:
- 10.1111/tpj.13018
- https://doi.org/10.1111/tpj.13018
- Author:
- Yan Deng; Gu Feng; Xinping Chen; Chunqing Zou
- Source:
- Field crops research 2017 v.209 pp. 1-9
- ISSN:
- 0378-4290
- Subject:
- plant growth; vesicular arbuscular mycorrhizae; flowering; mycorrhizal fungi; fertilizer rates; cropping systems; corn; intensive cropping; phosphorus; wheat; calcareous soils; crops
- Abstract:
- ... The occurrence and significance of arbuscular mycorrhizae (AM) are incompletely known in intensive cropping systems with high inputs of phosphorus (P). In this two-year study of an intensive wheat-maize rotation system on calcareous soil, we investigated plant growth and root colonization by indigenous AM fungi as affected by varied P application rates at different growth stages. Wheat growth was ...
- DOI:
- 10.1016/j.fcr.2017.04.004
- https://doi.org/10.1016/j.fcr.2017.04.004
9. Artificial neural networks to estimate the productivity of soybeans and corn by chlorophyll readings
- Author:
- Gabriela K. Michelon; Paulo L. de Menezes; Claudio L. Bazzi; Ermínio P. Jasse; Paulo S. G. Magalhães; Lígia F. Borges
- Source:
- Journal of plant nutrition 2018 v.41 no.10 pp. 1285-1292
- ISSN:
- 1532-4087
- Subject:
- chlorophyll; corn; crops; developmental stages; growing season; leaves; neural networks; plant development; prediction; soybeans
- Abstract:
- ... Crop productivity prediction techniques assist with adjusting for potential agronomic problems during the growing season. Several authors have reported that there is a correlation between leaf chlorophyll (Chl) content and yield. This study developed independent artificial neural network (ANN) models for soybean and corn in order to predict the crops' productive potentials using their respective y ...
- DOI:
- 10.1080/01904167.2018.1447579
- https://doi.org/10.1080/01904167.2018.1447579
- Author:
- J. Wang; J.L. Wang; C.X. Zhao; M.E. McGiffen; J.B. Liu; G.D. Wang
- Source:
- Theoretical and applied climatology 2018 v.131 no.3-4 pp. 1147-1156
- ISSN:
- 0177-798X
- Subject:
- Food and Agriculture Organization; corn; crop coefficient; crops; developmental stages; eddy covariance; evapotranspiration; growing season; models; prediction; researchers; summer; uncertainty; China
- Abstract:
- ... The two-step and one-step models for calculating evapotranspiration of maize were evaluated in a semi-humid and drought-prone region of northern China. Data were collected in the summers of 2013 and 2014 to determine relative model accuracy in calculating maize evaopotranspiration. The two-step model predicted daily evaoptranspiration with crop coefficients proposed by FAO and crop coefficient cal ...
- DOI:
- 10.1007/s00704-016-2032-2
- https://doi.org/10.1007/s00704-016-2032-2
- Author:
- A. Mozaffar; N. Schoon; A. Bachy; A. Digrado; B. Heinesch; M. Aubinet; M.-L. Fauconnier; P. Delaplace; P. du Jardin; C. Amelynck
- Source:
- Atmospheric environment 2018 v.176 pp. 71-81
- ISSN:
- 1352-2310
- Subject:
- C4 plants; Zea mays; acetaldehyde; acetic acid; acetone; atmospheric chemistry; chlorosis; climate; corn; crops; developmental stages; emissions; environmental factors; leaves; mass spectrometry; methanol; volatile organic compounds
- Abstract:
- ... Plants are the major source of Biogenic Volatile Organic Compounds (BVOCs) which have a large influence on atmospheric chemistry and the climate system. Therefore, understanding of BVOC emissions from all abundant plant species at all developmental stages is very important. Nevertheless, investigations on BVOC emissions from even the most widespread agricultural crop species are rare and mainly co ...
- DOI:
- 10.1016/j.atmosenv.2017.12.020
- https://doi.org/10.1016/j.atmosenv.2017.12.020
- Author:
- Darbyshire, Stephen J.; Francis, Ardath; Crompton, Clifford W.; Swanton, Clarence J.
- Source:
- Canadian journal of plant science 2011 v.91 no.1 pp. 205-219
- ISSN:
- 0008-4220
- Subject:
- Muhlenbergia; canopy; conservation tillage; control methods; corn; crops; developmental stages; forests; freshwater; grasses; grasslands; habitats; herbicides; indigenous species; pesticide application; planting; regrowth; rhizomes; shade tolerance; soybeans; warm season; weed control; weeds; Ontario; Quebec; United States
- Abstract:
- ... Muhlenbergia frondosa is a perennial grass native to eastern North America, which naturally inhabits moist to wet forest margins and openings, freshwater littoral habitats, and grasslands. In Canada, its spread as a weed appears to have coincided with changes in cultivation practices during the past few decades. Infestations in such crops as maize and soya bean have been reported mainly from south ...
- DOI:
- 10.4141/cjps10118
- https://doi.org/10.4141/cjps10118
- Author:
- Peter C. Scharf; John A. Lory
- Source:
- Agronomy journal 2002 v.94 no.3 pp. 397-404
- ISSN:
- 0002-1962
- Subject:
- Zea mays; aerial photography; altitude; color; corn; crops; developmental stages; fertilizer rates; nitrogen; nitrogen fertilizers; planting; prediction; soil
- Abstract:
- ... Supplemental N need of corn (Zea mays L.) and other crops can vary substantially within and among fields. Corn color is sensitive to N status and may provide a means to accurately match N fertilizer rates to spatially variable N needs. Our objective was to calibrate the relationship between corn color measured in aerial photographs and sidedress N need. Economic optimum N rate (EONR) at sidedress ...
- DOI:
- 10.2134/agronj2002.3970
- https://doi.org/10.2134/agronj2002.3970
- Author:
- Ma. Carmelita R. Alberto; Roland J. Buresh; Takashi Hirano; Akira Miyata; Reiner Wassmann; James R. Quilty; Teodoro Q. Correa; Joseph Sandro
- Source:
- Field crops research 2013 v.146 pp. 51-65
- ISSN:
- 0378-4290
- Subject:
- asexual reproduction; canopy; carbon; corn; crop management; crops; developmental stages; eddy covariance; energy transfer; fertigation; fertilizer rates; grain yield; growing season; hybrids; irrigation water; leaf area index; overhead irrigation; photosynthesis; plant establishment; production technology; rain; rice; rice soils; solar radiation; water use efficiency
- Abstract:
- ... A growing scarcity of irrigation water could progressively lead to changes in rice production to systems using less irrigation water for rice or more crop diversification. A shift from current production of rice on flooded soils to production of rice on non-flooded soil with water-saving irrigation or to production of more water-efficient crops will have profound effects on carbon, water, and ener ...
- DOI:
- 10.1016/j.fcr.2013.03.006
- https://doi.org/10.1016/j.fcr.2013.03.006
- Author:
- Ellie G. Kean; Nicolas Bordenave; Gebisa Ejeta; Bruce R. Hamaker; Mario G. Ferruzzi
- Source:
- Journal of cereal science 2011 v.54 no.3 pp. 450-459
- ISSN:
- 0733-5210
- Subject:
- bioavailability; bran; carotenes; corn; crops; developmental stages; endosperm; flour; inflorescences; milling fractions; semiarid zones; whole grain foods; xanthophylls
- Abstract:
- ... Sorghum is a staple crop and a potential dietary source of carotenoids in semi-arid regions of Africa, but information on the bioavailability of these pigments is limited. This study aimed at exploring the effects of agronomic manipulation on sorghum carotenoid contents at selected stages of kernel development and maturation and assessing carotenoid bioaccessibility from matured yellow-endosperm s ...
- DOI:
- 10.1016/j.jcs.2011.08.010
- https://doi.org/10.1016/j.jcs.2011.08.010
- Author:
- Rui Wang; Jiquan Zhang; Chunyi Wang; Enliang Guo
- Source:
- Remote Sensing 2019 v.12 no.1 pp. -
- ISSN:
- 2072-4292
- Subject:
- corn; crops; developmental stages; drought; flooded conditions; food security; remote sensing; soil water; spatial variation; temporal variation; China
- Abstract:
- ... Frequent droughts and waterlogging events are a threat to food security. An understanding of the spatial and temporal variations that occur during such events is essential when conducting a regional and/or global drought and waterlogging assessment. The goal of this study is to define a comprehensive index that considers the continuum system of atmosphere, crops, and soil moisture impacts on droug ...
- DOI:
- 10.3390/rs12010060
- https://doi.org/10.3390/rs12010060
- Author:
- Joshua J. Miller; James S. Schepers; Charles A. Shapiro; Nicholas J. Arneson; Kent M. Eskridge; Maxwel C. Oliveira; Loren J. Giesler
- Source:
- Field crops research 2018 v.216 pp. 22-31
- ISSN:
- 0378-4290
- Subject:
- canopy; corn; crops; developmental stages; growing season; harvesting; multiple cropping; prediction; probability; reflectance; scanners; seed treatment; seed yield; soybeans; vigor; wheat
- Abstract:
- ... Canopy reflectance has been used in crops, such as corn and wheat, to assess crop status and direct in-season management practices, but less research has focused on using canopy reflectance in soybean research and production. In this study, soybean canopy reflectance measurements were measured at several growth stages throughout the 2015 and 2016 growing seasons using the RapidSCAN CS-45 Handheld ...
- DOI:
- 10.1016/j.fcr.2017.11.006
- https://doi.org/10.1016/j.fcr.2017.11.006
- Author:
- Hartmut K. Lichtenthaler
- Source:
- Zeitschrift für Naturforschung 2014 v.39 no.5 pp. 492-499
- ISSN:
- 1865-7125
- Subject:
- active ingredients; anthocyanins; biogenesis; carotenoids; chlorophyll; corn; crops; developmental stages; fluorescence; grana; grasses; hydroxymethylglutaryl-CoA reductases; leaves; lovastatin; photosynthesis; sethoxydim; sterols; thylakoids
- Abstract:
- ... Biogenesis and development of chloroplasts are summarized in the light of new findings; the interactions of different groups of photosynthetic herbicides with chloroplast development are indicated. The effect of two new active ingredients, mevinolin* and sethoxydim **, on chloroplast modification and biogenesis are described. Mevinolin blocks the cytoplasmic HMG-CoA reductase and sterol accumulati ...
- DOI:
- 10.1515/znc-1984-0538
- https://doi.org/10.1515/znc-1984-0538
- Author:
- Craufurd, P.Q.; Wheeler, T.R.
- Source:
- Journal of experimental botany 2009 v.60 no.9 pp. 2529-2539
- ISSN:
- 0022-0957
- Subject:
- Zea mays; canopy; flowering; farm management; models; corn; spring; climate change; crop yield; air; photoperiod; temperature; climate; crops
- Abstract:
- ... Crop production is inherently sensitive to variability in climate. Temperature is a major determinant of the rate of plant development and, under climate change, warmer temperatures that shorten development stages of determinate crops will most probably reduce the yield of a given variety. Earlier crop flowering and maturity have been observed and documented in recent decades, and these are often ...
- DOI:
- 10.1093/jxb/erp196
- PubMed:
- 19505929
- https://doi.org/10.1093/jxb/erp196
- Author:
- Lais Gonzaga Gomez; Benjamin Loubet; Florence Lafouge; Raluca Ciuraru; Pauline Buysse; Brigitte Durand; Jean-Christophe Gueudet; Olivier Fanucci; Alain Fortineau; Olivier Zurfluh; Céline Decuq; Julien Kammer; Pascal Duprix; Sandy Bsaibes; François Truong; Valérie Gros; Christophe Boissard
- Source:
- Atmospheric environment 2019 pp. 116855
- ISSN:
- 1352-2310
- Subject:
- acetaldehyde; acetone; atmospheric chemistry; automation; comparative study; corn; crops; developmental stages; emissions; emissions factor; isoprene; methanol; monoterpenoids; photosynthetically active radiation; rapeseed; relative humidity; spectrometers; temperature; vegetation; volatile organic compounds; wheat; France
- Abstract:
- ... Biogenic volatile organic compounds (BVOC) are mainly emitted from vegetation. However there is still little information on BVOC exchanges with crops. In this study we measured fluxes of BVOC from wheat, maize and rapeseed crops near Paris at the plant level during a full-week period for each species. We used dynamic automated chambers coupled to a Proton Transfer Reaction, Quadrupole ion guide, T ...
- DOI:
- 10.1016/j.atmosenv.2019.116855
- https://doi.org/10.1016/j.atmosenv.2019.116855
- Author:
- Sonia Shilpi; Balaji Seshadri; Binoy Sarkar; Nanthi Bolan; Dane Lamb; Ravi Naidu
- Source:
- Chemosphere 2017 pp. -
- ISSN:
- 0045-6535
- Subject:
- Helianthus annuus; corn; crops; developmental stages; greenhouses; industry; irrigation; pH; sandy clay loam soils; seeds; slaughterhouses; soil chemical properties; soil nutrients; tap water; toxicity; wastewater; South Australia
- Abstract:
- ... In order to assess whether wastewaters from different industries (winery, abattoir, dairy and municipal) could be used safely to irrigate agricultural crops, a pot experiment in glass house was conducted in a sandy clay loam soil (pH = 6.12) from South Australia. Different concentrations (0, 0.05, 5, 25, 50, 75 and 100%) of the wastewaters diluted in an ordinary tap water were applied to soils sow ...
- DOI:
- 10.1016/j.chemosphere.2017.10.118
- https://doi.org/10.1016/j.chemosphere.2017.10.118
- Author:
- Sumana Leaungthitikanchana; Mayuki Tanaka; Sittichai Lordkaew; Sansanee Jamjod; Benjavan Rerkasem; Toru Fujiwara
- Source:
- Soil science and plant nutrition 2014 v.60 no.3 pp. 333-340
- ISSN:
- 1747-0765
- Subject:
- Oryza sativa; Triticum aestivum; Zea mays; biomarkers; boron; corn; crops; cultivars; developmental stages; gene expression; genes; genetic variation; genotype; plant breeding; quantitative polymerase chain reaction; rice; soil; tissues; transporters; wheat; Thailand
- Abstract:
- ... In Thailand, boron (B) deficiency in soil is found in the north region where wheat (Triticum aestivum L.), maize (Zea mays L.) and rice (Oryza sativa L.) are promoted cereals. Physiological analysis and genetic variation in B efficiency among plant genotypes have been reported; however, the molecular and genetic mechanisms of low B tolerance remain unclear. In this present study, we investigated t ...
- DOI:
- 10.1080/00380768.2014.881707
- https://doi.org/10.1080/00380768.2014.881707
- Author:
- Hongquan Wang; Ramata Magagi; Kalifa Goita
- Source:
- Remote sensing of environment 2017 pp. -
- ISSN:
- 0034-4257
- Subject:
- angle of incidence; canola; corn; crops; developmental stages; models; phenology; polarimetry; population characteristics; remote sensing; satellites; soil water; soybeans; synthetic aperture radar; time series analysis; wheat
- Abstract:
- ... This study investigates and compares the potential of three model-based polarimetric decompositions, namely those developed by Freeman-Durden (1998), Hajnsek et al. (2009) and An et al. (2010), for soil moisture retrieval over agricultural fields covered by several crops. The volume scattering component was first removed from the full coherency matrix. Then, in order to reduce the effect of the in ...
- DOI:
- 10.1016/j.rse.2017.07.008
- https://doi.org/10.1016/j.rse.2017.07.008
- Author:
- Amanullah; Manuel Tejada Moral
- Source:
- Cogent food & agriculture 2015 v.1 no.1 pp. 1011466
- ISSN:
- 2331-1932
- Subject:
- Setaria; Sorghum bicolor; Zea mays; agriculture; arid lands; biomass production; corn; crops; developmental stages; grain sorghum; spring; warm season; water use efficiency; Texas
- Abstract:
- ... Water use efficiency (WUE) and competition ratio (CR) response of three warm season C₄-cereals (grasses) viz. corn (Zea mays L., cv. Hybrid-5393 VT3), grain sorghum (Sorghum bicolor L. Moench, cv. Hybrid-84G62 PAT), and foxtail millets (Setaria italic, cv. German Strain R) in pure and mixed stands under low and high water levels was investigated. The experiment was conducted in pot experiment at D ...
- DOI:
- 10.1080/23311932.2015.1011466
- https://doi.org/10.1080/23311932.2015.1011466
- Author:
- Judy A. Tolk; Steven R. Evett; Wenwei Xu; Robert C. Schwartz
- Source:
- Field crops research 2016 v.186 pp. 66-77
- ISSN:
- 0378-4290
- Subject:
- Zea mays; biotic stress; clay loam soils; corn; crops; developmental stages; drought tolerance; evapotranspiration; grain yield; harvest index; hybrids; irrigation rates; irrigation water; plant density; sand; sandy loam soils; semiarid zones; silt loam soils; stress tolerance; temperature; vapors; water use efficiency; Texas
- Abstract:
- ... Identifying the constraints on crop water use efficiency (WUE) will help develop strategies to mitigate these limitations, potentially guiding agronomic and irrigation management strategies as well as providing needed directions in breeding. Boundary functions identify the upper limits of yield per unit of crop water use, and are useful for identifying constraints on WUE. The objectives of this re ...
- Handle:
- 10113/62035
- DOI:
- 10.1016/j.fcr.2015.11.012
- https://doi.org/10.1016/j.fcr.2015.11.012
- Author:
- Hongliang Fang; Yongchang Ye; Weiwei Liu; Shanshan Wei; Li Ma
- Source:
- Agricultural and forest meteorology 2018 v.253-254 pp. 48-61
- ISSN:
- 0168-1923
- Subject:
- canopy; corn; crops; data collection; developmental stages; grain sorghum; leaf area index; measuring devices; photography; remote sensing; seasonal variation; soybeans; telephones; transmittance; vegetative growth; China
- Abstract:
- ... Automatic leaf area index (LAI) measurements are important for obtaining sufficient amounts of field data over an extended period of time. A seasonal field campaign was carried out to obtain continuous LAI measurements over maize, soybean, and sorghum fields in northeast China in 2016. Field LAI measurements were acquired with the automatic PASTIS-57 (PAI Autonomous System from Transmittance Insta ...
- DOI:
- 10.1016/j.agrformet.2018.02.003
- https://doi.org/10.1016/j.agrformet.2018.02.003
- Author:
- LIU, YUAN; WANG, ENLI; YANG, XIAOGUANG; WANG, JING
- Source:
- Global change biology 2010 v.16 no.8 pp. 2287-2299
- ISSN:
- 1354-1013
- Subject:
- autumn; climate; climate change; cooling; corn; crop models; crops; cultivars; developmental stages; filling period; grain yield; meteorological data; spring; temperature; wheat; China
- Abstract:
- ... The North China Plain (NCP) is the most important agricultural production area in China. Crop production in the NCP is sensitive to changes in both climate and management practices. While previous studies showed a negative impact of climatic change on crop yield since 1980s, the confounding effects of climatic and agronomic factors have not been separately investigated. This paper used 25 years of ...
- DOI:
- 10.1111/j.1365-2486.2009.02077.x
- https://doi.org/10.1111/j.1365-2486.2009.02077.x
- Author:
- Spyridon Mourtzinis; David Marburger; John Gaska; Thierno Diallo; Joe G. Lauer; Shawn Conley
- Source:
- Crop science 2017 v.57 no.2 pp. 983-992
- ISSN:
- 0011-183X
- Subject:
- Glycine max; Triticum aestivum; Zea mays; continuous cropping; corn; crop rotation; crops; developmental stages; fungicides; grain yield; growers; nitrogen; nitrogen fertilizers; pesticide application; production technology; silage; soybeans; wheat; Wisconsin
- Abstract:
- ... Crop rotations involving corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] are well‐known production systems across the Midwestern United States, but the addition of wheat (Triticum aestivum L.) in the rotation has received less attention. Additionally, the interactive effect of crop rotation with nitrogen (N) fertilizer and foliar fungicide application on yields for these three crops is not ...
- DOI:
- 10.2135/cropsci2016.10.0876
- https://doi.org/10.2135/cropsci2016.10.0876
- Author:
- Weaver Susan E.
- Source:
- Weed science 2003 v.51 no.2 pp. 163-170
- ISSN:
- 0043-1745
- Subject:
- annual weeds; corn; crops; developmental stages; grass weeds; leaves; soil; soybeans; Canada
- Abstract:
- ... A study was undertaken to determine whether the relative leaf stages of common annual weeds and crops could serve as a reliable indicator of the time of weed emergence. Ten annual broadleaved and grass weeds were sown at successive intervals in field corn and soybean at Harrow, ON, Canada, in 1997, 1998, and 1999. All weeds emerging at a particular crop leaf stage were assigned to a cohort. Leaf n ...
- DOI:
- 10.1614/0043-1745(2003)051[0163:CARCAW]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2003)051[0163:CARCAW]2.0.CO;2
- Author:
- Yonglan Qian; Zhengwei Yang; Liping Di; Md. Shahinoor Rahman; Zhenyu Tan; Lei Xue; Feng Gao; Eugene Genong Yu; Xiaoyang Zhang
- Source:
- Remote Sensing 2019 v.11 no.20 pp. -
- ISSN:
- 2072-4292
- Subject:
- National Agricultural Statistics Service; corn; crop yield; crops; developmental stages; growing season; heat sums; meteorological data; moderate resolution imaging spectroradiometer; monitoring; normalized difference vegetation index; phenology; reflectance; remote sensing; time series analysis; yield forecasting; Iowa
- Abstract:
- ... Remotely sensed data have been used in crop condition monitoring for decades. Traditionally, crop growth conditions were assessed by comparing Normalized Difference Vegetation Index (NDVI) of the current year and past years at a pixel scale on the same calendar day. The assumption of this comparison is that the different years’ crops were at the same growing stage on the same day. However, t ...
- DOI:
- 10.3390/rs11202439
- https://doi.org/10.3390/rs11202439
- Author:
- G. L. Terman; J. L. Anthony; W. P. Mortensen; J. A. Lutz
- Source:
- Soil Science Society of America journal 1956 v.20 no.4 pp. 551-556
- ISSN:
- 0361-5995
- Subject:
- NPK fertilizers; Sorghum bicolor subsp. drummondii; corn; crop yield; crops; developmental stages; diammonium phosphate; dicalcium phosphate; field experimentation; forage; greenhouse experimentation; greenhouses; oats; phosphorus; soil; superphosphate; vegetables; water solubility; water soluble phosphorus; wheat; Georgia; Kentucky; Mississippi; North Carolina; Tennessee; Virginia; Washington (state)
- Abstract:
- ... Crop response to 7-14-14, 6-12-12, 10-20-20, and 11-22-22 fertilizers was determined on 5 soils in 2 greenhouse experiments in Tennessee and Virginia and in 21 field experiments in Georgia, Kentucky, Mississippi, North Carolina, Tennessee, and Washington. All soils were acid to neutral in reaction. The fertilizers, separately formulated from dicalcium phosphate, ammoniated ordinary superphosphate, ...
- DOI:
- 10.2136/sssaj1956.03615995002000040025x
- https://doi.org/10.2136/sssaj1956.03615995002000040025x
- Author:
- Jiangui Liu; Jiali Shang; Budong Qian; Ted Huffman; Yinsuo Zhang; Taifeng Dong; Qi Jing; Tim Martin
- Source:
- Remote Sensing 2019 v.11 no.20 pp. -
- ISSN:
- 2072-4292
- Subject:
- annuals; corn; cropland; crops; developmental stages; grain yield; mixed cropping; models; moderate resolution imaging spectroradiometer; reflectance; regression analysis; remote sensing; soybeans; spatial data; spatial variation; spring; temporal variation; time series analysis; vegetation index; winter wheat; Ontario
- Abstract:
- ... This study investigated the estimation of grain yields of three major annual crops in Ontario (corn, soybean, and winter wheat) using MODIS reflectance data extracted with a general cropland mask and crop-specific masks. Time-series two-band enhanced vegetation index (EVI2) was derived from the 8 day composite 250 m MODIS reflectance data from 2003 to 2016. Using a general cropland mask, the stron ...
- DOI:
- 10.3390/rs11202419
- https://doi.org/10.3390/rs11202419
- Author:
- Stephanie C. Montgomery; Robert J. Martin; Chris Guppy; Graeme C. Wright; Richard J. Flavel; Sophanara Phan; Sophoeun Im; Van Touch; Karl Andersson; Matthew K. Tighe
- Source:
- Field crops research 2016 v.198 pp. 290-302
- ISSN:
- 0378-4290
- Subject:
- Arachis hypogaea; Helianthus annuus; Sorghum bicolor; Vigna radiata; Vigna unguiculata; Zea mays; corn; cowpeas; crop yield; crops; developmental stages; drought; farmers; growing season; heat; highlands; meteorological data; models; monsoon season; mung beans; on-farm research; peanuts; plant stress; planting date; probability; profits and margins; rain; soil profiles; soil water; sowing date; sustainable agriculture; traditional farming; water stress; Cambodia
- Abstract:
- ... Crop yields are declining in Northwest Cambodia and crop failure in the pre-monsoon season is commonplace with 69% of farmers surveyed stating that drought is a constraint to production. Farmers currently lack knowledge to adopt more sustainable farming practices. A trial was conducted in Samlout District, Battambang Province, Northwest Cambodia to investigate the feasibility of a sowing time two ...
- DOI:
- 10.1016/j.fcr.2016.07.002
- https://doi.org/10.1016/j.fcr.2016.07.002
- Author:
- Sacks, William J.; Deryng, Delphine; Foley, Jonathan A.; Ramankutty, Navin
- Source:
- Global ecology and biogeography 2010 v.19 no.5 pp. 607-620
- ISSN:
- 1466-822X
- Subject:
- georeferencing; harvest date; planting date; socioeconomic factors; evapotranspiration; flowering; air temperature; data collection; corn; tropics; spring wheat; latitude; soil water; temperate zones; winter wheat; crops
- Abstract:
- ... To assemble a data set of global crop planting and harvesting dates for 19 major crops, explore spatial relationships between planting date and climate for two of them, and compare our analysis with a review of the literature on factors that drive decisions on planting dates. Global. We digitized and georeferenced existing data on crop planting and harvesting dates from six sources. We then examin ...
- DOI:
- 10.1111/j.1466-8238.2010.00551.x
- https://doi.org/10.1111/j.1466-8238.2010.00551.x
- Author:
- Luisa Martelloni; Michele Fontanelli; Christian Frasconi; Michele Raffaelli; Andrea Peruzzi
- Source:
- Applied engineering in agriculture 2016 v.32 no.5 pp. 569-578
- ISSN:
- 0883-8542
- Subject:
- alternative farming; biomass; control methods; corn; crops; developmental stages; forest management; grain yield; heat tolerance; herbicides; liquid petroleum gas; models; weed control; weeds
- Abstract:
- ... Flame weeding is the most common thermal intra-row weed control method used in agriculture as an alternative to herbicides in heat-tolerant crops. Within the seventh framework program project "Robot fleets for Highly Effective Agriculture and Forestry Management" (RHEA), the University of Pisa was responsible for the development of an automatic machine for intra-row cross-flaming in maize ( L.). T ...
- DOI:
- 10.13031/aea.32.11114
- https://doi.org/10.13031/aea.32.11114
- Author:
- Chávez, José L.; Neale, Christopher M. U.; Prueger, John H.; Kustas, William P.
- Source:
- Irrigation science 2008 v.27 no.1 pp. 67-81
- ISSN:
- 0342-7188
- Subject:
- alfalfa; corn; crops; developmental stages; eddy covariance; energy balance; environmental factors; evapotranspiration; heat transfer; image analysis; prediction; remote sensing; soil; vegetation; Iowa
- Abstract:
- ... In this study, six extrapolation methods have been compared for their ability to estimate daily crop evapotranspiration (ETd) from instantaneous latent heat flux estimates derived from digital airborne multispectral remote sensing imagery. Data used in this study were collected during an experiment on corn and soybean fields, covering an area of approximately 12 x 22 km, near Ames, Iowa. ETd estim ...
- DOI:
- 10.1007/s00271-008-0122-3
- https://doi.org/10.1007/s00271-008-0122-3
- Author:
- A. Domínguez; J.A. de Juan; J.M. Tarjuelo; R.S. Martínez; A. Martínez-Romero
- Source:
- Agricultural water management 2012 v.110 no. pp. 67-77
- ISSN:
- 0378-3774
- Subject:
- climatic factors; corn; crops; deficit irrigation; developmental stages; evapotranspiration; filling period; irrigation management; models; ripening; water stress; Spain
- Abstract:
- ... For a certain overall deficit target, this paper develops a methodology (Optimized Regulated Deficit Irrigation (ORDI)) for determining the stress level (in terms of the rate between actual crop evapotranspiration (ETₐ) and maximum evapotranspiration (ETₘ)) that can be applied to each growth period for maximum yield. ORDI is based on the equation proposed by Stewart et al. (1977) and compatible wi ...
- DOI:
- 10.1016/j.agwat.2012.04.002
- https://doi.org/10.1016/j.agwat.2012.04.002
- Author:
- Lauren M. Liuzza; Edward W. Bush; Brenda S. Tubana; Lewis A. Gaston
- Source:
- Communications in soil science and plant analysis 2020 v.51 no.3 pp. 392-402
- ISSN:
- 1532-2416
- Subject:
- Glycine max; Zea mays; corn; crop production; crops; developmental stages; dietary recommendations; nutrient content; nutrients; plant tissues; soil; soil nutrients; soybeans; vegetative growth; Louisiana
- Abstract:
- ... Agricultural chemistry is fundamental when determining fertilization inputs for crop production. Reliable recommendations from soil and plant tissue analyzes are critical when applying nutrients for optimum growth. The objective of this study was to assess the variances in nutrient recommendations reported by different analytical laboratories. Agriculture crops, field corn (Zea mays L.) and soybea ...
- DOI:
- 10.1080/00103624.2019.1709488
- https://doi.org/10.1080/00103624.2019.1709488
- Author:
- Ben Zhao; Syed Tahir Ata-Ul-Karim; Zhandong Liu; Dongfeng Ning; Junfu Xiao; Zugui Liu; Anzhen Qin; Jiqin Nan; Aiwang Duan
- Source:
- Field crops research 2017 v.208 pp. 60-68
- ISSN:
- 0378-4290
- Subject:
- corn; cropping systems; crops; cultivars; developmental stages; environmental factors; equations; field experimentation; grain yield; leaves; nitrogen; nitrogen content; nitrogen fertilizers; nutrient use efficiency; summer; China
- Abstract:
- ... Accurate diagnosis of nitrogen (N) fertilizer required for crop growth can serve as a guide for N management by improving N use efficiency and grain yields. The critical N concentration (Nc), the minimum N required for maximal crop growth has been widely used to determine crop N status. Nc dilution curves have been determined in several crops including summer maize on plant dry matter (DM) basis, ...
- DOI:
- 10.1016/j.fcr.2017.03.010
- https://doi.org/10.1016/j.fcr.2017.03.010
40. Drip irrigation enhances shallow groundwater contribution to crop water consumption in an arid area
- Author:
- Xingwang Wang; Zailin Huo; Huade Guan; Ping Guo; Zhongyi Qu
- Source:
- Hydrological processes 2018 v.32 no.6 pp. 747-758
- ISSN:
- 0885-6087
- Subject:
- arid zones; corn; cropland; crops; decision making; developmental stages; drainage; ecosystems; evaporation; evapotranspiration; flood irrigation; groundwater; indigenous species; irrigated farming; irrigation management; irrigation water; issues and policy; microirrigation; models; quantitative analysis; soil water; soil water content; water conservation; water requirement; water table
- Abstract:
- ... Shallow groundwater plays a key role in agro‐hydrological processes of arid areas. Groundwater often supplies a necessary part of the water requirement of crops and surrounding native vegetation, such as groundwater‐dependent ecosystems. However, the impact of water‐saving irrigation on cropland water balance, such as the contribution of shallow groundwater to field evapotranspiration, requires fu ...
- DOI:
- 10.1002/hyp.11451
- https://doi.org/10.1002/hyp.11451
- Author:
- Fageria, N.K.
- Source:
- Communications in soil science and plant analysis 2004 v.35 no.7-8 pp. 961-974
- ISSN:
- 0010-3624
- Subject:
- Glycine max; Oryza sativa; Oxisols; Phaseolus vulgaris; Zea mays; annuals; beans; corn; crop rotation; crops; developmental stages; dry matter accumulation; field experimentation; nutrient content; nutrient management; nutrients; plant age; plant tissues; rice; sampling; shoots; sowing; soybeans; tissue analysis
- Abstract:
- ... Knowledge of dry matter production and nutrient concentrations in annual crops at different growth stages is important for nutrient management and improving yields. Field experiments were conducted to determine dry matter yield of shoot of upland rice (Oryza sativa L.), common bean (Phaseolus vulgaris L.), corn (Zea mays L.), and soybean (Glycine max L. Merrill) grown in rotation on an Oxisol. Pla ...
- DOI:
- 10.1081/CSS-120030572
- https://doi.org/10.1081/CSS-120030572
- Author:
- Mauro E. Holzman; Facundo Carmona; Raúl Rivas; Raquel Niclòs
- Source:
- ISPRS journal of photogrammetry and remote sensing 2018 v.145 pp. 297-308
- ISSN:
- 0924-2716
- Subject:
- agroclimatology; corn; crop yield; crops; developmental stages; evapotranspiration; food security; harvesting; models; moderate resolution imaging spectroradiometer; photosynthesis; radiant energy; semiarid zones; soil water; solar radiation; soybeans; summer; temperature; vegetation; vegetation index; water holding capacity; water stress; winter; yield forecasting
- Abstract:
- ... Soil moisture (SM) available for evapotranspiration is crucial for food security, given the significant interannual yield variability of rainfed crops in large agricultural regions. Also, incoming solar radiation (Rs) influences the photosynthetic rate of vegetated surfaces and can affect productivity. The aim of this work is to evaluate the ability of crop water stress and Rs remotely sensed data ...
- DOI:
- 10.1016/j.isprsjprs.2018.03.014
- https://doi.org/10.1016/j.isprsjprs.2018.03.014
- Author:
- Abdelaziz Nilahyane; M. Anowarul Islam; Abdel O. Mesbah; Axel Garcia y Garcia
- Source:
- Agronomy 2018 v.8 no.10 pp. -
- ISSN:
- 2073-4395
- Subject:
- Zea mays; application timing; corn; crops; developmental stages; evapotranspiration; fertilizer application; field experimentation; growing season; irrigation water; microirrigation; nitrogen; nitrogen fertilizers; semiarid zones; silage; urea ammonium nitrate; water use efficiency; Wyoming
- Abstract:
- ... In water-scarce regions, high yield and improved water use efficiency (WUE) of crops can be obtained if water and nitrogen (N) are properly applied. While water and N have been the subject of research worldwide, studies are needed to advance our understanding on the complexity of their interaction. A field experiment was conducted at the University of Wyoming Powell Research and Extension Center i ...
- DOI:
- 10.3390/agronomy8100208
- https://doi.org/10.3390/agronomy8100208
- Author:
- Usha Mina; Ram Kumar; Robin Gogoi; Arti Bhatia; R.C. Harit; Deepak Singh; Amit Kumar; A. Kumar
- Source:
- Ecological indicators 2019 v.105 pp. 292-302
- ISSN:
- 1470-160X
- Subject:
- adverse effects; biomass; carbon dioxide; climate change; corn; crops; data collection; developmental stages; genotype; leaves; phenols; photosynthesis; principal component analysis; temperature; water content
- Abstract:
- ... Reports on the adverse impacts of climate change on growth and productivity of crops due to elevated temperature and carbon dioxide concentration ([CO2]) is persistently raising the need for development of tools to assess response of crops to climate change factors. In the present study, Crop Health Index (CHI) was generated for response of maize genotypes under elevated temperature and [CO2]. Und ...
- DOI:
- 10.1016/j.ecolind.2017.08.060
- https://doi.org/10.1016/j.ecolind.2017.08.060
- Author:
- SAMI UL-ALLAH; ASIF ALI KHAN; THOMAS FRICKE; ANDREAS BUERKERT; MICHAEL WACHENDORF
- Source:
- Experimental agriculture 2015 v.51 no.4 pp. 485-500
- ISSN:
- 1469-4441
- Subject:
- Avena sativa; Sorghum bicolor subsp. bicolor; Sorghum bicolor subsp. drummondii; Trifolium alexandrinum; Zea mays; animal manures; chlorophyll; corn; cropping systems; crops; developmental stages; farmers; fertilizer application; field experimentation; forage; forage production; forage yield; irrigation rates; irrigation water; livestock; mineral fertilizers; oats; prediction; semiarid zones; vegetative growth; water use efficiency; Pakistan
- Abstract:
- ... In many parts of Pakistan, availability of green forage is critical to livestock farmers. Forage production is often conducted with two succeeding crops grown within one year and it is highly affected by uncertain availability of irrigation water and low levels of applied mineral fertilisers. The objectives of the present study were to (i) evaluate the effects of crop species, fertiliser type and ...
- DOI:
- 10.1017/S001447971400043X
- https://doi.org/10.1017/S001447971400043X
- Author:
- Bo Ma; Gang Liu; Fan Ma; Zhanbin Li; Faqi Wu
- Source:
- Acta agriculturæ Scandinavica 2019 v.69 no.1 pp. 12-25
- ISSN:
- 1651-1913
- Subject:
- agricultural land; corn; crops; developmental stages; rain; rainfall simulation; runoff; sediment yield; sediments; soil erosion; soybeans; topography; winter wheat; China
- Abstract:
- ... Crops are the most important ground cover on slope farmland and have a significant impact on the soil erosion. But soil erosion on slope farmland is also affected by many other factors, such as topography and rainfall. In order to explore the effect of crop growth on soil erosion on different slope gradient of slope farmland, and analyze the interaction of crop growth and slope gradient on soil er ...
- DOI:
- 10.1080/09064710.2018.1488988
- https://doi.org/10.1080/09064710.2018.1488988
- Author:
- Igbadun, Henry E.; Salim, Baanda A.; Tarimo, Andrew K. P. R.; Mahoo, Henry F.
- Source:
- Irrigation science 2008 v.27 no.1 pp. 11-23
- ISSN:
- 0342-7188
- Subject:
- basins; biomass production; corn; crops; deficit irrigation; developmental stages; dry matter accumulation; dry season; evapotranspiration; field experimentation; grain yield; irrigated farming; irrigation rates; irrigation scheduling; irrigation water; leaf area index; soil water balance; soil water content; subwatersheds; surface irrigation; vegetative growth; water use efficiency; Tanzania
- Abstract:
- ... This paper presents the findings of the effect of some selected deficit irrigation scheduling practices on irrigated maize crop in a sub-catchment in south western part of Tanzania. Field experiments, in which maize (TMV1-ST) variety was planted under total irrigation, were conducted during the dry seasons of 2004 and 2005. Surface irrigation method was used and the crop was planted in basins. The ...
- DOI:
- 10.1007/s00271-008-0117-0
- https://doi.org/10.1007/s00271-008-0117-0
- Author:
- Yang Wu; Fangyuan Huang; Chao Zhang; Zhikuan Jia
- Source:
- Arid land research and management 2016 v.30 no.4 pp. 490-504
- ISSN:
- 1532-4990
- Subject:
- biodegradability; corn; crop yield; crops; developmental stages; dry matter accumulation; fallow; income; mulching; plastic film; semiarid zones; soil water; soil water deficit; straw; water supply; China
- Abstract:
- ... A study was conducted in the semi-arid region of the Loess Plateau in China to identify an alternative material for use instead of plastic film under maize crops. Plastic film (PMW), straw (SMW), and biodegradable film (BMW) were used for mulching throughout the whole season (fallow and growth periods), in addition to straw for mulching (SMF) only during the fallow period. The results showed that ...
- DOI:
- 10.1080/15324982.2016.1194911
- https://doi.org/10.1080/15324982.2016.1194911
- Author:
- F. Madeira; X. Pons
- Source:
- Journal of applied entomology 2015 v.139 no.9 pp. 712-720
- ISSN:
- 0931-2048
- Subject:
- Orius; Zea mays; corn; crops; developmental stages; females; insects; leaves; males; plant density; rubidium; sticky traps; weeds; Iberian Peninsula; Spain
- Abstract:
- ... Orius majusculus Reuter (Heteroptera: Anthocoridae) is the most common and abundant generalist predator in Spanish maize crops and is sensitive to drastic changes in weed density. We carried out a 2‐year study in the NE Iberian Peninsula to examine the dispersal of O. majusculus in maize plots with moderately high and low weed density. Insects were collected using yellow sticky traps and/or a bug‐ ...
- DOI:
- 10.1111/jen.12213
- https://doi.org/10.1111/jen.12213
- Author:
- A. Rehman; F.U. Hassan; R. Qamar; M. Ali; M.S. Zamir; S. Iqbal; M. Shehzad; N. Masood; H.M.R. Javeed
- Source:
- Quality assurance and safety of crops & foods 2017 v.9 no.2 pp. 213-220
- ISSN:
- 1757-837X
- Subject:
- Parthenium hysterophorus; Zea mays; annual weeds; atrazine; biomass; bromoxynil; corn; crop-weed competition; crops; developmental stages; foods; grain yield; grazing lands; irrigation; metolachlor; pendimethalin; quality control; toxicity; Pakistan
- Abstract:
- ... Parthenium hysterophorus L. is a noxious annual weed rapidly spreading in cropped areas of the irrigated Punjab and other parts of Pakistan. It has become a major threat to grazing lands and crops in Punjab province. The main objective of this study was to explore the efficacy of different herbicides with various concentrations viz. pendimethalin, S-metolachlor + atrazine, bromoxynil + 2-methyl-4- ...
- DOI:
- 10.3920/QAS2015.0750
- https://doi.org/10.3920/QAS2015.0750
- « Previous
- Next »
- 1
- 2
- 3
- 4