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- Author:
- Widmoser, P.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 224-230
- ISSN:
- 0378-3774
- Subject:
- estimation; crop production; plant stress; canopy; biomarkers; equations; infrared radiation; water requirement; validity; water stress; plant-water relations; surface temperature; homeostasis; thermometers; reference standards; energy balance; measurement; prediction; crops
- Abstract:
- ... Canopy temperature, which may be estimated by infrared thermometry (IRT), can serve as an indicator of plant water status. proposed the nowadays much used concept of the crop water stress index, which relates observed canopy surface temperature (T s ) to maxima and minima temperature bounds. defined those bounds on the basis of the energy balance. Those bounds vary with the meteorological situatio ...
- DOI:
- 10.1016/j.agwat.2009.09.012
-
http://dx.doi.org/10.1016/j.agwat.2009.09.012
- Author:
- Zhu, Xiangming; Zuo, Qiang; Shi, Jianchu
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 291-299
- ISSN:
- 0378-3774
- Subject:
- irrigation water; simulation models; root systems; plant nutrition; total soluble solids; soil nutrients; nutrient uptake; model validation; water flow; soil nutrient dynamics; soil water; soil fertility; soil transport processes; solubility; phosphorus; water uptake; roots; hydrologic models; soil-plant interactions
- Abstract:
- ... Soil soluble phosphorus (P) transport with root-phosphorus-uptake (RPU) is a critical process for plant growth, cycling of P in soil-plant systems and environment protection. However, modeling soil soluble P transport is extremely challenging because it is difficult to measure the RPU distribution directly, especially in the field. In this study, an inverse method, which was utilized successfully ...
- DOI:
- 10.1016/j.agwat.2009.09.020
-
http://dx.doi.org/10.1016/j.agwat.2009.09.020
- Author:
- Flake, John; Moon, Todd K.; McKee, Mac; Gunther, Jacob H.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 208-214
- ISSN:
- 0378-3774
- Subject:
- freshwater; arid zones; basins; irrigation canals; water requirement; probability analysis; watersheds; water flow; data analysis; irrigated farming; irrigation requirement; probabilistic models; hydrologic models; prediction; Utah
- Abstract:
- ... This work addresses management of water for irrigation in arid regions where significant delays between the time of order and the time of delivery present major difficulties. Motivated by improvements to water management that will be facilitated by an ability to predict water demand, it employs a data-driven approach to developing canal flow prediction models using the relevance vector machine (RV ...
- DOI:
- 10.1016/j.agwat.2009.09.010
-
http://dx.doi.org/10.1016/j.agwat.2009.09.010
- Author:
- Baalousha, Husam
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 240-246
- ISSN:
- 0378-3774
- Subject:
- geographical distribution; kriging; sampling; basins; water quality; groundwater contamination; spatial distribution; geostatistics; data collection; thematic maps; pollutants; groundwater; spatial data; hydrogeology; case studies; detection; nitrates; environmental monitoring; New Zealand
- Abstract:
- ... A groundwater monitoring network can provide quantity and quality data necessary to make informed decisions regarding the state of the environment. A properly designed monitoring system provides a representative understanding of the state of the monitored area. The selection of the optimum number of monitoring sites and their spatial distribution is a major challenge for the hydrogeologist. On the ...
- DOI:
- 10.1016/j.agwat.2009.09.013
-
http://dx.doi.org/10.1016/j.agwat.2009.09.013
- Author:
- Galelli, S.; Gandolfi, C.; Soncini-Sessa, R.; Agostani, D.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 187-200
- ISSN:
- 0378-3774
- Subject:
- freshwater; simulation models; rivers; stochastic processes; equations; water requirement; flood irrigation; hydrologic models; methodology; irrigated farming; irrigation requirement; decision making; Italy
- Abstract:
- ... Complex decision-making problems, related to planning and management of irrigation water resources, generally preclude the use of large, distributed-parameter models, which are then commonly substituted by lumped-parameter models. This paper, with the aim of improving the quality of these latter, introduces a new approach for their design. This approach is based on metamodelling, which proposes to ...
- DOI:
- 10.1016/j.agwat.2009.09.007
-
http://dx.doi.org/10.1016/j.agwat.2009.09.007
- Author:
- Leal, Rafael Marques Pereira; Firme, Lilian Pittol; Herpin, Uwe; da Fonseca, Adriel Ferreira; Montes, Célia Regina; dos Santos Dias, Carlos Tadeu; Melfi, Adolpho José
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 271-276
- ISSN:
- 0378-3774
- Subject:
- tropical soils; tropical agriculture; sugarcane; dissolved organic carbon; crop yield; soil solution; nutrient uptake; risk assessment; sewage effluent; soil fertility; wastewater irrigation; plant nutrition; groundwater contamination; leaching; irrigated farming; nitrogen; Saccharum; irrigated soils; soil nutrient dynamics; nitrates; soil-plant interactions; Brazil
- Abstract:
- ... Carbon (C) and nitrogen (N) dynamics in agro-systems can be altered as a consequence of treated sewage effluent (TSE) irrigation. The present study evaluated the effects of TSE irrigation over 16 months on N concentrations in sugarcane (leaves, stalks and juice), total soil carbon (TC), total soil nitrogen (TN), NO₃ ⁻-N in soil and nitrate (NO₃ ⁻) and dissolved organic carbon (DOC) in soil solutio ...
- DOI:
- 10.1016/j.agwat.2009.09.018
-
http://dx.doi.org/10.1016/j.agwat.2009.09.018
- Author:
- Jin, Y.H.; Zhou, D.W.; Jiang, S.C.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 326-332
- ISSN:
- 0378-3774
- Subject:
- arid zones; Zea mays; plant available water; soil temperature; soil water content; plant growth; sowing; dry environmental conditions; corn; depth; drought; semiarid soils; furrows; grain yield; soil ridges; China
- Abstract:
- ... Water deficits and unusually warm soil temperatures can adversely affect conventional ridge sown systems. Increasingly serious water and temperature issues associated with global climate change may be problematic in the future, particularly in semiarid regions. This study explored the soil water and crop yield benefits of switching the sowing location of corn from ridges to furrows. Experiments we ...
- DOI:
- 10.1016/j.agwat.2009.10.002
-
http://dx.doi.org/10.1016/j.agwat.2009.10.002
- Author:
- Yoshikawa, N.; Nagao, N.; Misawa, S.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 259-270
- ISSN:
- 0378-3774
- Subject:
- rice; Oryza sativa; kinematics; protective effect; fields; paddy soils; hills; hydrologic models; crop production; agricultural runoff; drainage channels; dams (hydrology); velocity; flooded conditions; stream channels; floods; water flow; rain; Japan
- Abstract:
- ... To mitigate flood damage due to a recent increase in the frequency and magnitude of heavy rainfall events, the Kamihayashi district in Niigata prefecture, Japan, has undertaken flood mitigation measures using paddy fields by installing runoff control devices in drainage boxes of paddy field plots. The purpose of this study is to evaluate the flood mitigation performance of the Paddy Field Dam proj ...
- DOI:
- 10.1016/j.agwat.2009.09.017
-
http://dx.doi.org/10.1016/j.agwat.2009.09.017
- Author:
- Hassanli, Ali Morad; Ahmadirad, Shahram; Beecham, Simon
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 357-362
- ISSN:
- 0378-3774
- Subject:
- crop yield; roots; water stress; sugar beet; wastewater irrigation; freshwater; water quality; process monitoring; Beta vulgaris subsp. vulgaris; soil water; root growth; irrigated farming; water resources; sugar content; water use efficiency; furrow irrigation; microirrigation; irrigation management; wastewater; Iran
- Abstract:
- ... Rapid urbanization and industrialization have increased the pressure on limited existing fresh water to meet the growing needs for food production. Two immediate responses to this challenge are the efficient use of irrigation technology and the use of alternative sources of water. Drip irrigation methods may play an important role in efficient use of water but there is still limited information on ...
- DOI:
- 10.1016/j.agwat.2009.10.010
-
http://dx.doi.org/10.1016/j.agwat.2009.10.010
- Author:
- Hou, L.G.; Xiao, H.L.; Si, J.H.; Xiao, S.C.; Zhou, M.X.; Yang, Y.G.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 351-356
- ISSN:
- 0378-3774
- Subject:
- arid lands; dry environmental conditions; water requirement; seasonal variation; estimation; weather; energy balance; Populus; hydrologic models; mathematical models; oases; equations; riparian forests; soil water; crop coefficient; tree growth; crop models; evapotranspiration; growing season; reference standards; arid soils; China
- Abstract:
- ... Based on successive observation, fifteen-day evapotranspiration (ET c ) of Populus euphratica Oliv forest, in the extreme arid region northwest China, was estimated by application of Bowen ratio-energy balance method (BREB) during the growing season in 2005. During the growing season in 2005, total ET c was 446.96mm. From the beginning of growing season, the ET c increased gradually, and reached i ...
- DOI:
- 10.1016/j.agwat.2009.09.022
-
http://dx.doi.org/10.1016/j.agwat.2009.09.022
- Author:
- Conejero, W.; Ortuño, M.F.; Mellisho, C.D.; Torrecillas, A.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 333-338
- ISSN:
- 0378-3774
- Subject:
- plant density; Prunus persica; irrigation scheduling; measurement; estimation; phenology; tree trunk; plant-water relations; hydrologic models; crop production; plant growth; equations; irrigated farming; water potential; climatic factors; prediction; crop models; peaches; shrinkage; diurnal variation; reference standards; fruiting
- Abstract:
- ... The effects of high crop load (unthinned trees, 22-23 fruits cm⁻² of trunk cross-sectional area (TCSA)), commercial crop load (3-4 fruits cm⁻² of TCSA), and no crop load (all fruitlets removed) on maximum daily trunk shrinkage (MDS), trunk growth rate (TGR) and stem water potential (Ψ stem) were studied during the fruit growth period and 20 days following harvest in fully irrigated early maturing ...
- DOI:
- 10.1016/j.agwat.2009.10.003
-
http://dx.doi.org/10.1016/j.agwat.2009.10.003
- Author:
- Miller, J.; Chanasyk, D.; Curtis, T.; Entz, T.; Willms, W.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 247-258
- ISSN:
- 0378-3774
- Subject:
- water pollution; rivers; water quality; indicator species; cattle; nutrients; microbiological quality; best management practices; streams; cattle production; riverbank protection; estuarine sediments; riparian areas; environmental assessment; excreta; fences; bacteria; protective effect; Alberta
- Abstract:
- ... The goal of beneficial management practices (BMPs) such as streambank fencing is to prevent or reduce water pollution of surface water bodies. We conducted a four year (2004-2007) study on a fenced 800-m reach of the Lower Little Bow (LLB) River in southern Alberta, Canada. Our hypothesis was that riparian health would be improved by streambank fencing, and that cattle exclusion would prevent wate ...
- DOI:
- 10.1016/j.agwat.2009.09.016
-
http://dx.doi.org/10.1016/j.agwat.2009.09.016
- Author:
- Cai, X.L.; Sharma, B.R.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 309-316
- ISSN:
- 0378-3774
- Subject:
- rice; water requirement; plant density; model validation; crop yield; remote sensing; estimation; census data; data collection; thematic maps; weather; hydrologic models; plant growth; basins; accuracy; prediction; crop models; evapotranspiration; India; Bangladesh; Pakistan; Ganges River; Nepal
- Abstract:
- ... Crop consumptive water use and productivity are key elements to understand basin water management performance. This article presents a simplified approach to map rice (Oryza sativa L.) water consumption, yield, and water productivity (WP) in the Indo-Gangetic Basin (IGB) by combining remotely sensed imagery, national census and meteorological data. The statistical rice cropped area and production ...
- DOI:
- 10.1016/j.agwat.2009.09.021
-
http://dx.doi.org/10.1016/j.agwat.2009.09.021
- Author:
- Lam, Q.D.; Schmalz, B.; Fohrer, N.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 317-325
- ISSN:
- 0378-3774
- Subject:
- wastewater treatment; model validation; watersheds; nutrients; pastures; risk assessment; diffusion; lowland forests; point source pollution; probabilistic models; hydrologic models; water pollution; simulation models; water quality; environmental assessment; lowlands; long term effects; water flow; pollution load; nitrates; Germany
- Abstract:
- ... The assessments of potential environmental impacts of point and diffuse source pollution at regional scales are necessary to achieve the sustainable development of natural resources such as land and water. Nutrient related diffuse source pollutant inputs can enhance crop growth and improve soil eutrophication. However, excessive nutrient input can result in the impairment of water quality. The obj ...
- DOI:
- 10.1016/j.agwat.2009.10.004
-
http://dx.doi.org/10.1016/j.agwat.2009.10.004
- Author:
- Nazer, Dima W.; Tilmant, Amaury; Mimi, Ziad; Siebel, Maarten A.; Van der Zaag, Pieter; Gijzen, Huub J.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 339-345
- ISSN:
- 0378-3774
- Subject:
- crop production; crop models; citrus fruits; linear models; arid lands; irrigation scheduling; cropping systems; water allocation; irrigated farming; vegetables; hydrologic models; West Bank
- Abstract:
- ... We examine optimal irrigation water allocation on the West Bank using a linear mathematical programming model. Our analysis involves five agricultural zones and five fruit and vegetable crops: tomatoes, cucumbers, eggplant, squash and citrus. We analyze three scenarios: (1) maintaining the existing cropping patterns, (2) maximizing profit under water and land availability constraints, and (3) maxi ...
- DOI:
- 10.1016/j.agwat.2009.10.006
-
http://dx.doi.org/10.1016/j.agwat.2009.10.006
- Author:
- Li, Fusheng; Yu, Jiangmin; Nong, Mengling; Kang, Shaozhong; Zhang, Jianhua
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 231-239
- ISSN:
- 0378-3774
- Subject:
- water uptake; rhizosphere; fertilizer application; soil chemistry; dry matter accumulation; soil fertility; urease; crop production; Zea mays; corn; beta-fructofuranosidase; soil water; irrigated farming; enzyme activity; nitrogen fertilizers; canopy; acid phosphatase; irrigation systems; catalase; water use efficiency; irrigated soils
- Abstract:
- ... Partial root-zone irrigation (PRI) is an effective water-saving irrigation method but the heterogeneous soil moisture distribution that may affect soil enzymatic activities and crop water use. With pot-grown maize, we investigated the dry mass accumulation, crop water-use efficiency and the activities of four major soil enzymes from jointing to grain filling stages of maize plants subjected to PRI ...
- DOI:
- 10.1016/j.agwat.2009.09.014
-
http://dx.doi.org/10.1016/j.agwat.2009.09.014
- Author:
- Li, Yi; Horton, Robert; Ren, Tusheng; Chen, Chunyan
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 300-308
- ISSN:
- 0378-3774
- Subject:
- water requirement; validity; meteorological parameters; estimation; calibration; evaporation rate; irrigation requirement; probabilistic models; hydrologic models; temporal variation; crop production; plant growth; sampling; equations; irrigated farming; prediction; evapotranspiration; data analysis; China
- Abstract:
- ... It is important to determine how well ET o can be estimated from easily observed E pan (free water evaporation measured by a pan) measurements and the other climatic data. Our objectives are to predict annual ET o with E pan data (with a calibrated k p (=ET o/E pan)) and with a 4-variable regression function method. The significance of the trends of E pan, ET o and k p series were detected. The wh ...
- DOI:
- 10.1016/j.agwat.2009.10.001
-
http://dx.doi.org/10.1016/j.agwat.2009.10.001
- Author:
- Doltra, J.; Muñoz, P.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 277-285
- ISSN:
- 0378-3774
- Subject:
- crop production; crop models; irrigation; hydrologic models; leaching; risk assessment; nutrient uptake; soil types; soil nutrient dynamics; fertigation; soil fertility; model validation; irrigated farming; vegetables; crop rotation; accuracy; nitrates; soil-plant interactions; Spain
- Abstract:
- ... Two different modeling approaches were used to simulate the N leached during an intensively fertigated crop rotation: a recently developed crop-based simulation model (EU-Rotate_N) and a widely recognized solute transport model (Hydrus-2D). Model performance was evaluated using data from an experiment where four N fertigation levels were applied to a bell pepper-cauliflower-Swiss chard rotation in ...
- DOI:
- 10.1016/j.agwat.2009.09.019
-
http://dx.doi.org/10.1016/j.agwat.2009.09.019
- Author:
- Jang, T.I.; Kim, H.K.; Im, S.J.; Park, S.W.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 201-207
- ISSN:
- 0378-3774
- Subject:
- rice; Oryza sativa; water management; floods; land use; probability analysis; watersheds; methodology; seasonal variation; watershed hydrology; paddy soils; irrigated farming; storms; runoff; wet season; computer software; hydrologic models; prediction; South Korea
- Abstract:
- ... Most flood damage in Korea is caused by heavy rainfall events and typhoons during the summer rainy season. A modified Natural Resources Conservation Service (NRCS) TR-20 model, TR-20-RICE, was developed to investigate the storm runoff characteristics of a 385-ha mixed-landuse watershed in Korea. The TR-20-RICE not only used the rainfall excess and hydrologic flood routing components of the origina ...
- DOI:
- 10.1016/j.agwat.2009.09.004
-
http://dx.doi.org/10.1016/j.agwat.2009.09.004
- Author:
- Šťastná, M.; Toman, F.; Dufková, J.
- Source:
- Agricultural water management 2010 v.97 no.2 pp. 286-290
- ISSN:
- 0378-3774
- Subject:
- crop models; plant growth; wet environmental conditions; dry environmental conditions; Solanum tuberosum; longitudinal studies; model validation; tubers; crop yield; potatoes; weather; crop management; accuracy; prediction; Czech Republic
- Abstract:
- ... The study focused on evaluation of SUBSTOR-Potato model and its utilization in potato grows management. The experimental field used for the model evaluation was located in Žabčice—South Moravian region with altitudes of 179m above the sea level. Tuber yield served as reference for the model evaluation. Nine years experimental data set (1994-2002) was used for the model evaluation. Rosara cultivar ...
- DOI:
- 10.1016/j.agwat.2009.09.015
-
http://dx.doi.org/10.1016/j.agwat.2009.09.015