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1. Adoption and welfare impacts of multiple agricultural technologies: evidence from eastern Zambia

Author:
Khonje, Makaiko G.; Manda, Julius; Mkandawire, Petros; Tufa, Adane Hirpa; Alene, Arega D.
Source:
Agricultural economics 2018 v.49 no.5 pp. 599-609
ISSN:
0169-5150
Subject:
crop yield,   etc   ; poverty; Zambia;     Show all 3 Subjects
Abstract:
... Using plot level panel data and multinomial endogenous switching regression, this article analyzes the adoption and welfare impacts of multiple agricultural technologies in eastern Zambia. We adapt a multinomial endogenous switching/treatment effect regression framework to correct for selection bias and endogeneity originating from both observed and unobserved heterogeneity. Results indicate that ...
DOI:
10.1111/agec.12445

2. CRISPR/Cas in Arabidopsis: overcoming challenges to accelerate improvements in crop photosynthetic efficiencies

Author:
Khumsupan, Panupon; Donovan, Sophie; McCormick, Alistair J.
Source:
Physiologia plantarum 2019 v.166 no.1 pp. 428-437
ISSN:
0031-9317
Subject:
crop yield,   etc   ; Arabidopsis thaliana; gene editing; models; photosynthesis;     Show all 5 Subjects
Abstract:
... The rapid and widespread adoption of clustered regularly interspaced short palindromic repeats (CRISPR)/Cas technologies has allowed genetic editing in plants to enter a revolutionary new era. In this mini review, we highlight the current CRISPR/Cas tools available in plants and the use of Arabidopsis thaliana as a model to guide future improvements in crop yields, such as enhancing photosynthetic ...
DOI:
10.1111/ppl.12937

3. External shocks, agent interactions, and endogenous feedbacks — Investigating system resilience with a stylized land use model

Author:
Chen, Yang; Bakker, Martha M.; Ligtenberg, Arend; Bregt, Arnold K.
Source:
Ecological complexity 2019 pp. 100765
ISSN:
1476-945X
Subject:
crop yield,   etc   ; ecology; land use; models; social behavior; soil;     Show all 6 Subjects
Abstract:
... Dynamics of coupled Social-Ecological Systems (SES) result from the interplay of society and ecology. To assess SES resilience, we constructed an Agent-Based Model (ABM) of a land use system as a stereotypical example of SES and investigated how resilience of the represented system is affected by both external disturbances and internal dynamics. The model explicitly considered different aspects of ...
DOI:
10.1016/j.ecocom.2019.04.003

4. Utilization of Large-Sized Dolomite By-Product Particles and Losses of Cations from Acidic Soil

Author:
Litvinovich, Andrey; Salaev, Ivan; Pavlova, Olga; Lavrishchev, Anton; Bure, Vladimir; Saljnikov, Elmira
Source:
Communications in soil science and plant analysis 2019 v.50 no.7 pp. 869-877
ISSN:
1532-2416
Subject:
crop yield,   etc   ; acid soils; biomass production; byproducts; cations; dolomite; flour;     Show all 7 Subjects
Abstract:
... To investigate the possibilities of utilization of dolomite large size fractions (dropouts) and their effect on plants a five-year experiment was set in 2015. A fertilization value of large fractions (5–7 and 7–10 mm) of dolomite in two doses was studied. The biomass yield of crops in dolomite dropout treatment was around 90% from the treatment using dolomite flour (control). Losses of bases from ...
DOI:
10.1080/00103624.2019.1589490

5. Considerations on spatial crop load mapping

Author:
Taylor, J.A.; Dresser, J.L.; Hickey, C.C.; Nuske, S.T.; Bates, T.R.
Source:
Australian journal of grape and wine research 2019 v.25 no.2 pp. 144-155
ISSN:
1322-7130
Subject:
crop yield,   etc   ; fruits; georeferencing; labor; vigor; vines; vineyards; viticulture;     Show all 8 Subjects
Abstract:
... Crop load, the ratio of vine size to mass of fruit harvested, is fundamental to viticulture. Measuring vine size and crop yield, the components of crop load, has historically been a labour intensive exercise that has limited the use of crop load information to improve management in vineyards. Recent advances in assessing vine vigour, size and yield using geo‐referenced sensors are starting to make ...
DOI:
10.1111/ajgw.12378

6. Drought characterisation based on an agriculture-oriented standardised precipitation index

Author:
Tigkas, Dimitris; Vangelis, Harris; Tsakiris, George
Source:
Theoretical and applied climatology 2019 v.135 no.3-4 pp. 1435-1447
ISSN:
0177-798X
Subject:
crop yield,   etc   ; agricultural industry; atmospheric precipitation; drought; semiarid zones; Greece;     Show all 6 Subjects
Abstract:
... Drought is a major natural hazard with significant effects in the agricultural sector, especially in arid and semi-arid regions. The accurate and timely characterisation of agricultural drought is crucial for devising contingency plans, including the necessary mitigation measures. Many drought indices have been developed during the last decades for drought characterisation and analysis. One of the ...
DOI:
10.1007/s00704-018-2451-3

7. Measuring Maize in South Africa: The Shifting Structure of Production During the Twentieth Century, 1904–2015

Author:
Greyling, Jan C.; Pardey, Philip G.
Source:
Agrekon 2019 v.58 no.1 pp. 21-41
ISSN:
2078-0400
Subject:
crop yield,   etc   ; agricultural statistics; corn; farmers; South Africa;     Show all 5 Subjects
Abstract:
... Using a new compilation of agricultural data, we find that South Africa increased its total maize production from 328,000 tons in 1904 to 1.68 million tons in 1935, and 12.2 million tons centred on 2015. This 6.1-fold increase in overall maize production since 1935 occurred against a 35.7 per cent reduction in the area planted, made possible by an 8.6-fold increase in average maize yields. While c ...
DOI:
10.1080/03031853.2018.1523017

8. Partially Linear Functional Additive Models for Multivariate Functional Data

Author:
Wong, Raymond K. W.; Li, Yehua; Zhu, Zhengyuan
Source:
Journal of the American Statistical Association 2019 v.114 no.525 pp. 406-418
ISSN:
1537-274X
Subject:
crop yield,   etc   ; equations; models; principal component analysis; yield forecasting;     Show all 5 Subjects
Abstract:
... We investigate a class of partially linear functional additive models (PLFAM) that predicts a scalar response by both parametric effects of a multivariate predictor and nonparametric effects of a multivariate functional predictor. We jointly model multiple functional predictors that are cross-correlated using multivariate functional principal component analysis (mFPCA), and model the nonparametric ...
DOI:
10.1080/01621459.2017.1411268

9. Vertical farming: a summary of approaches to growing skywards

Author:
Beacham, Andrew M.; Vickers, Laura H.; Monaghan, James M.
Source:
Journal of horticultural science & biotechnology 2019 v.94 no.3 pp. 277-283
ISSN:
1462-0316
Subject:
crop yield,   etc   ; agricultural land; crops; food production; vegetables; vertical farming;     Show all 6 Subjects
Abstract:
... Pressure on agricultural land from a rising global population is necessitating the maximisation of food production per unit area of cultivation. Attention is increasingly turning to Vertical Farming (VF) approaches in an attempt to provide a greater crop yield per square meter of land. However, this term has been used to cover a broad range of approaches, from personal- or community-scale vegetabl ...
DOI:
10.1080/14620316.2019.1574214

10. First report of Lasiodiplodia brasiliense causing maize stalk rot

Author:
Aguiar, F. M.; Costa, R. V.; Silva, D. D.; Lana, U. G. P.; Gomes, E. A.; Cota, L. V.
Source:
Australasian plant disease notes 2018 v.13 no.1 pp. 41
ISSN:
1833-928X
Subject:
crop yield,   etc   ; Lasiodiplodia; corn stover; fungi; Brazil;     Show all 5 Subjects
Abstract:
... Maize stalk rot can lead to major corn yield losses in Brazil and worldwide. Maize stalks exhibiting tiny black specks or light brown lesions were collected in the city of Luís Eduardo Magalhães. Based on morphological characteristics and molecular assays, the fungus was identified as Lasiodiplodia brasiliense. This is the first report of maize stalk rot caused by L. brasiliense. ...
DOI:
10.1007/s13314-018-0320-7

11. Recent changes in county-level maize production in the United States: Spatial-temporal patterns, climatic drivers and the implications for crop modelling

Author:
Leng, Guoyong; Peng, Jian; Huang, Shengzhi
Source:
The Science of the total environment 2019 v.686 pp. 819-827
ISSN:
0048-9697
Subject:
crop yield,   etc   ; census data; climatic factors; corn; crop models; food availability; simulation models; United States;     Show all 8 Subjects
Abstract:
... Despite the fact that it is the total crop production that shapes future food supply rather than one of its single component, previous studies have mainly focused on the changes in crop yield. It is possible that recent gains in crop production are mainly due to improvement of yield rather than growth of harvest area. However, it remains unclear about the geographical patterns of their relative co ...
DOI:
10.1016/j.scitotenv.2019.06.026

12. Co-design of improved climbing bean production practices for smallholder farmers in the highlands of Uganda

Author:
Ronner, E.; Descheemaeker, K.; Almekinders, C.; Ebanyat, P.; Giller, K.E.
Source:
Agricultural systems 2019 v.175 pp. 1-12
ISSN:
0308-521X
Subject:
crop yield,   etc   ; beans; farms; gender; highlands; limited resource farmers; nongovernmental organizations; researchers; socioeconomics; Uganda;     Show all 10 Subjects
Abstract:
... We evaluated the usefulness of a co-design process to generate a relevant basket of options for climbing bean cultivation in the context of a large-scale project. The aim was to identify a range of options sufficiently diverse to be of interest for farmers of widely-different resource endowment. The co-design process consisted of three cycles of demonstration, evaluation and re-design in the easte ...
DOI:
10.1016/j.agsy.2019.05.003

13. Limited nitrogen availability has cultivar-dependent effects on potato tuber yield and tuber quality traits

Author:
Van Dingenen, Judith; Hanzalova, Katerina; Abd Allah Salem, Mohamed; Abel, Christin; Seibert, Tanja; Giavalisco, Patrick; Wahl, Vanessa
Source:
Food chemistry 2019 v.288 pp. 170-177
ISSN:
0308-8146
Subject:
crop yield,   etc   ; Luehea; Solanum tuberosum; breeding; cultivars; food quality; nitrogen; potatoes; sprouting; starch; sucrose; tubers;     Show all 12 Subjects
Abstract:
... An excess of nitrogen (N) is used in agriculture endangering the environment and food quality. One approach to circumvent this is to generate crops with a stable or even increased productivity under limited N. Here, we studied the effect of reduced N availability on potato (Solanum tuberosum) tuber yield and quality traits using five varieties: the wild Andigena and the commercial cultivars Désiré ...
DOI:
10.1016/j.foodchem.2019.02.113

14. Impacts of integrated soil fertility management on yield and household income: The case of Tamale (Ghana) and Kakamega (Kenya)

Author:
Adolwa, Ivan Solomon; Schwarze, Stefan; Buerkert, Andreas
Source:
Ecological economics 2019 v.161 pp. 186-192
ISSN:
0921-8009
Subject:
crop yield,   etc   ; farmers; farms; household income; livelihood; models; soil fertility; Ghana; Kenya;     Show all 9 Subjects
Abstract:
... Integrated soil fertility management (ISFM) has been widely promoted by research and philanthropic organizations as well as governments to increase crop yields and improve livelihoods of smallholder farmers in Africa. Therefore, it is surprising that there is still scant information on its impact on crop yields and household income. This paper uses a counterfactual model to assess ISFM impact on y ...
DOI:
10.1016/j.ecolecon.2019.03.023

15. Physiological and productive parameters of the okra under irrigation levels

Author:
dos Santos Farias, Diego Bispo; da Silva, Paulo Silas Oliveira; Tadeu Lucas, Ariovaldo Antonio; de Freitas, Maria Iderlane; de Jesus Santos, Tiago; Nascimento Fontes, Pryanka Thuyra; de Oliveira Júnior, Luiz Fernando Ganassali
Source:
Scientia horticulturae 2019 v.252 pp. 1-6
ISSN:
0304-4238
Subject:
crop yield,   etc   ; chlorophyll; fluorescence; gas exchange; irrigation rates; okra; water stress;     Show all 7 Subjects
Abstract:
... Plants undergoing any kind of water stress, whether due to excess or lack of water, undergo changes in their biochemical and physiological system, compromising their development. The effects of different irrigation levels on the physiological parameters (chlorophyll content, chlorophyll a fluorescence and gas exchange) and yield of okra were evaluated. Four levels of irrigation were evaluated (ver ...
DOI:
10.1016/j.scienta.2019.02.066

16. Post petal fall applications of gibberellins improve fruit set on pear

Author:
Lordan, Jaume; Vilardell, Pere; Peris, Miquel; Torres, Estanis; Alegre, Simó; Asín, Luis
Source:
Scientia horticulturae 2019 v.252 pp. 149-155
ISSN:
0304-4238
Subject:
crop yield,   etc   ; additive effect; cultivars; flowering; frost; fruit drop; fruit set; gibberellins; orchards; pears; scions; spring;     Show all 12 Subjects
Abstract:
... Commercial pear production has become increasingly difficult over the last decade, with low fruit set being one of the main factors leading to poor yield of pear orchards. The use of gibberellins to increase fruit set has been widely reported, but in most of the cases these applications are made at full bloom or right after a spring frost has occurred. However, the increase in fruit set due to ear ...
DOI:
10.1016/j.scienta.2019.03.031

17. Impact of foliar-applied Hoagland’s nutrient solution on growth and yield of mash bean (Vigna mungo L.) under different growth stages

Author:
Waheed, Hasnain; Javaid, Muhammad Mansoor; Shahid, Adeel; Ali, Hafiz Haider; Nargis, Javaria; Mehmood, Azhar
Source:
Journal of plant nutrition 2019 v.42 no.10 pp. 1133-1141
ISSN:
1532-4087
Subject:
crop yield,   etc   ; Vigna mungo; beans; cultivars; developmental stages; field experimentation; mash; nutrient solutions;     Show all 8 Subjects
Abstract:
... In a field experiment, various strengths of Hoagland’s nutrient solutions were sprayed to mitigate the deleterious effects of nutrient stresses at different growth stages on mash bean cultivars. Hoagland’s nutrient solution strengths of 0, 25, 50, and 75% were applied at 7, 14, and 21 days after emergence on mash bean cultivars namely Mash-2 and Mash-88. Hoagland’s nutrient solution of 75% strengt ...
DOI:
10.1080/01904167.2019.1607380

18. Evaluation of GreenCrop Tracker for the Estimation of Leaf Area Index in Wheat Using Digital Photography

Author:
Sandhu, S. S.; Kaur, Prabhjyot; Singh, Jagdish; Nigam, R.; Gill, K. K.
Source:
Proceedings of the National Academy of Sciences, India, Section B: biological sciences 2019 v.89 no.2 pp. 615-621
ISSN:
0369-8211
Subject:
crop yield,   etc   ; canopy; digital images; labor; leaf area index; simulation models; sowing; wheat;     Show all 8 Subjects
Abstract:
... The information on leaf area index (LAI) is important to agricultural scientists for in-season crop yield estimation using different crop growth simulation models. The determination of LAI using currently available instruments is costly/destructive and time consuming. A technique of LAI estimation using GreenCrop Tracker model is available, but it needs to be validated. Therefore, an investigation ...
DOI:
10.1007/s40011-018-0974-0

19. How High the Hedge: Relationships between Prices and Yields in the Federal Crop Insurance Program

Author:
Ramsey, A. Ford; Goodwin, Barry K.; Ghosh, Sujit K.
Source:
Journal of agricultural and resource economics 2019 v.44 no.2 pp. 227-245
ISSN:
1068-5502
Subject:
crop yield,   etc   ; corn; crop insurance; prices; revenue insurance; simulation models; United States;     Show all 7 Subjects
Abstract:
... The theory of the natural hedge states that agricultural yields and prices are inversely related.Actuarial rules for U.S. crop revenue insurance assume that dependence between yield and price is constant across all counties within a state and that dependence can be adequately described by the Gaussian copula. We use nonlinear measures of association and a selection of bivar ate copulas to empirica ...

20. Variety identification of oat seeds using hyperspectral imaging: investigating the representation ability of deep convolutional neural network

Author:
Wu, Na; Zhang, Yu; Na, Risu; Mi, Chunxiao; Zhu, Susu; He, Yong; Zhang, Chu
Source:
RSC advances 2019 v.9 no.22 pp. 12635-12644
ISSN:
2046-2069
Subject:
crop yield,   etc   ; hyperspectral imagery; models; oats; principal component analysis; regression analysis; seeds; support vector machines; wavelengths;     Show all 9 Subjects
Abstract:
... Variety identification of seeds is critical for assessing variety purity and ensuring crop yield. In this paper, a novel method based on hyperspectral imaging (HSI) and deep convolutional neural network (DCNN) was proposed to discriminate the varieties of oat seeds. The representation ability of DCNN was also investigated. The hyperspectral images with a spectral range of 874–1734 nm were primaril ...
DOI:
10.1039/c8ra10335f