A Weather‐Soil Variable for Estimating Soil Moisture Stress and Corn Yield Probabilities

Dale, Robert F.; Daniels, James A.

doi:10.2134/agronj1995.00021962008700060013x

Cited by 17 publications

(8 citation statements)

References 7 publications

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“…A slight modification to the above definition is to use potential water uptake in place of actual water uptake, as in the DSSAT crop models (Ritchie, 1998). Dale and Daniels (1995), on the other hand, used ET/PET to quantify water stress, where ET and PET are actual and potential evapotranspiration. Morgan et al (1980) used the ratio of available soil moisture to available soil moisture at field capacity in the soil profile as an indication of soil moisture stress.…”

Section: The Plant As a Hydraulic Systemmentioning

confidence: 99%

Trans‐Disciplinary Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems

Ahuja

Timlin

2006

Soil Science Soc of Amer J

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Synthesis and quantification of disciplinary knowledge at the whole system level, via the process models of agricultural systems, are critical to achieving improved and dynamic management and production systems that address the environmental concerns and global issues of the 21st century. Soil physicists have made significant contributions in this area in the past, and are uniquely capable of making the muchneeded and exciting new contributions. Most of the exciting new research opportunities are trans-disciplinary, that is, lie on the interfacial boundaries of soil physics and other disciplines, especially in quantifying interactions among soil physical processes, plant and atmospheric processes, and agricultural management practices. Some important knowledge-gap and cutting-edge areas of such research are: (1) quantification and modeling the effects of various management practices (e.g., tillage, no-tillage, crop residues, and rooting patterns) on soil properties and soil-plant-atmosphere processes; (2) the dynamics of soil structure, especially soil cracks and biochannels, and their effects on surface runoff of water and mass, and preferential water and chemical transport to subsurface waters; (3) biophysics of changes in properties and processes at the soil-plant and plant-atmosphere interfaces; (4) modeling contributions of agricultural soils to climate change and effects of climate change on soil environment and agriculture; and (5) physical (cause-effect) quantification of spatial variability of soil properties and their outcomes, new methods of parameterizing a variable field for field-scale modeling, and new innovative methods of aggregating output results from plots to fields to larger scales. The current status of the various aspects of these research areas is reviewed briefly. The future challenges are identified that will require both experimental research and development of new concepts, theories, and models.

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Section: The Plant As a Hydraulic Systemmentioning

confidence: 99%

Trans‐Disciplinary Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems

Ahuja

Timlin

2006

Soil Science Soc of Amer J

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“…The response of corn plants to water stress has been shown to change with hybrid (Lorens et al, 1987) and can be affected by improving technological level (Dale and Daniels, 1995). Effects of water stress on corn include the visible symptoms of reduced growth, delayed maturity, and reduced crop yield.…”

Section: Introductionmentioning

confidence: 99%

Yield response of corn to deficit irrigation in a semiarid climate

Payero

Melvin

Irmak

et al. 2006

Agricultural Water Management

252

147

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“…Weather remains the most unpredictable and uncontrollable input in crop production (Dale and Daniels 1995). Of the primary weather variables affecting crop growth and yield, precipitation is the most variable and often the most limiting.…”

Section: Mots Clésmentioning

confidence: 99%

When is short-season soybean most susceptible to water stress?

Morrison¹,

McLaughlin²,

Cober³

et al. 2006

Can. J. Plant Sci.

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. 2006. When is short-season soybean most susceptible to water stress? Can. J. Plant Sci. 86: 1327-1331. Fourteen soybean (Glycine max L. Merr.) cultivars were grown at Ottawa from 1993 to 2004 in a replicated design. Phenology, yield and seed quality data were collected. Climate data were merged into the data set. Seven key phenological growth stages were identified and the total precipitation (ppt) between stages was calculated per cultivar for all possible durations. Mean cumulative ppt among the growth stage durations was correlated with mean seed yield, 1000-seed weight (tsw) seed protein and oil content. Variation in ppt prior to flowering did not influence yield. Yield and tsw were found to be most susceptible to water stress from flowering to the end of seed development. The most sensitive stage occurred during a period from the beginning to the end of pod development (R4 to mid R5). Seed protein was correlated with ppt from the beginning of flowering to the beginning of seed development. Seed oil content was reduced by late season precipitation. The identification of the most sensitive stage of development in soybean to water stress will be useful for producers forecasting yield response to precipitation and for plant breeders targeting selection for water stress tolerance. Ils ont recueilli des données sur la phénologie, le rendement et la qualité des semences. Des relevés météorologiques ont ensuite été intégrés à la base de données. Après avoir établi les sept stades clés de croissance d'après la phénologie, les auteurs ont calculé les précipitations totales (ppt) par cultivar entre les différents stades, pour toutes les durées possibles. Finalement, les ppt cumulatives moyennes ont été corrélées au rendement grainier moyen, au poids de mille graines, à la concentration de protéines et à la teneur en huile. La variation des ppt avant la floraison n'a aucune incidence sur le rendement. Le rendement et le poids de mille graines sont les paramètres les plus sensibles au stress hydrique entre la floraison et la fin du développement des graines. Le stade le plus fragile survient entre le début et la fin du développement des gousses (R4 à milieu de R5). La concentration de protéines présente une corrélation avec les ppt du début de la floraison au début du développement des graines. Des précipitations en fin de saison réduisent la teneur en huile de la graine. L'identification du stade de développement du soja le plus sensible au stress hydrique aidera les producteurs à prévoir la réaction du rendement aux précipitations et les phytogénéticiens à sélectionner des variétés tolérant mieux le stress hydrique. Mots clés:Stress hydrique, soja, Glycine max L. Merr.Weather remains the most unpredictable and uncontrollable input in crop production (Dale and Daniels 1995). Of the primary weather variables affecting crop growth and yield, precipitation is the most variable and often the most limiting. In many soybean (Glycine max L. Merr.) growing regions, periodic water stress during critical periods of development...

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A Weather‐Soil Variable for Estimating Soil Moisture Stress and Corn Yield Probabilities

Cited by 17 publications

References 7 publications

Trans‐Disciplinary Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems

Trans‐Disciplinary Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems

Yield response of corn to deficit irrigation in a semiarid climate

When is short-season soybean most susceptible to water stress?

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