Crop-Water Production Functions

Vaux, Henry J.; Pruitt, William O.

doi:10.1016/b978-0-12-024302-0.50009-6

Cited by 149 publications

(76 citation statements)

References 40 publications

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“…3). Classical crop water production functions have frequently been described as having a convex or curvilinear shape (Stewart and Hagan, 1973;Vaux and Pruitt, 1983;Geerts and Raes, 2009) because irrigation efficiency may decrease as ET m is approached; nevertheless, yield versus field water supply functions are linear if the irrigation efficiency is essentially constant (Stewart and Hagan, 1973). Modern irrigation systems have the capacity for relatively constant nominal efficiencies throughout the range of water applications typically applied.…”

Section: Yield and Field Water Supplymentioning

confidence: 99%

“…Potato and sugar beet yield prediction equations also had similar slopes. The negative intercepts for each of these relationships reflect the nongrowth-related evaporation component of ET c that displaces the yield versus ET c function along the x-axis (Stewart and Hagan, 1973;Vaux and Pruitt, 1983). Hanks and Rasmussen (1982) estimated the soil evaporation (E) portion of ET c and demonstrated that seasonal k y values should always be greater than 1 because the intercept of the yield and ET c relationship is negative.…”

Section: Yield and Crop Evapotranspirationmentioning

confidence: 99%

“…Empirical relationships between crop yield and evapotranspiration have been used for decades to examine the effects of water stress on potential yield reductions (Stewart et al, 1977;Doorenbos and Kassam, 1979;Vaux and Pruitt, 1983;Howell, 1990). Stewart et al (1977) and Doorenbos and Kassam (1979) predicted relative yield reductions from the product of relative evapotranspiration deficits and a crop-specific yield response factor or yield reduction ratio.…”

Section: Introductionmentioning

confidence: 99%

“…This approach has been used extensively to estimate relative yield from inadequate irrigation applications or shortages in water supply (Martin et al, 1984;Scheierling et al, 1997;Kirda et al, 1999;Raes et al, 2006;Shrestha et al, 2010). Relationships between crop yield and evapotranspiration may subsequently be used to develop crop water production functions that relate crop yield to the field water supply, which includes effective precipitation, stored soil moisture depletion, and irrigation amounts that account for spray droplet evaporation and water drift outside the target area, surface runoff, and deep percolation losses (Stewart and Hagan, 1973;Vaux and Pruitt, 1983;Howell, 1990). Effective precipitation is the portion of total precipitation that is available for ET c and does not include surface runoff and deep percolation (Howell, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Crop Yield and Water Requirement Relationships for Major Irrigated Crops in Southern Alberta

Bennett

Harms

2011

Canadian Water Resources Journal

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Water supplies available for irrigation in southern Alberta are limited. A study was conducted in southern Alberta to develop crop yield and evapotranspiration (ET c ) relationships for major irrigated crops based on current maximum potential crop yield data and improved methods for determination of crop evapotranspiration. Production functions for crop yield and the field water supply, which includes irrigation at 80% efficiency, effective precipitation, and stored soil moisture depletion, were subsequently determined. These empirical relationships may be used by water managers, economists, and producers to examine the economic implications of crop yield reductions from water stress due to limited water supplies, less than optimum (deficit) irrigation management, or variation in evaporative demand from year to year in different agro-climatic areas of southern Alberta. Potential yield estimates for different scenarios may be used with relevant economic information to determine optimum water use for irrigation.Résumé : L'approvisionnement en eau pour l'irrigation dans le sud de l'Alberta est limité. Une étude a été menée dans le sud de l'Alberta pour développer les relations entre le rendement des cultures et l'évapotranspiration (ET c ) pour les principales cultures irriguées fondées sur des données de rendement potentiel maximal actuel ainsi que sur les méthodes améliorées pour la détermination de l'évapotranspiration. Les fonctions de production pour le rendement des cultures et de l'approvisionnement en eau champ, qui comprend l'irrigation à 80% d'efficacité, les précipitations efficace, et la diminution de la réserve en eau du sol, ont été déterminées par la suite. Ces relations empiriques peuvent être utilisées par les gestionnaires de la ressource eau, les économistes et les producteurs pour examiner les conséquences économiques de la réduction des rendements due au stress hydrique associé aux réserves limitées en eau, à la gestion inadéquate (déficit) de l'irrigation ou aux variation du niveau d'évapotranspiration d'une année à l'autre sous les différentes zones agro-climatiques du sud de l'Alberta. Les estimations de rendements potentiels pour différents scénarios peuvent être utilisées en conjonction avec les informations économiques pertinentes pour optimiser la gestion de l'eau d'irrigation. 160Canadian Water Resources Journal/Revue canadienne des ressources hydriques

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Section: Yield and Field Water Supplymentioning

confidence: 99%

Section: Yield and Crop Evapotranspirationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crop Yield and Water Requirement Relationships for Major Irrigated Crops in Southern Alberta

Bennett

Harms

2011

Canadian Water Resources Journal

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“…Vaux and Pruitt (1983) found the yield of various agricultural crops as a linear function of cumulative ET. However, a non-linear response may also result due to the availability of excessive water, resulting in an increased E without a corresponding increase in the yield (Vaux and Pruitt 1983;Liu et al 2002). In contrast, Dunin (2002) suggested that there was no relationship between net primary productivity and annual water use.…”

Section: Relationship Between Biomass and Water Usementioning

confidence: 99%

Maximising the use of soil water by herbaceous species in the high rainfall zone of southern Australia: a review

Singh¹,

Bird²,

Saul³

2003

Aust. J. Agric. Res.

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Abstract. The planting of deep-rooted pasture species, herbaceous shrubs, and trees has been widely recommended to reduce deep drainage and recharge to the groundwater in the high rainfall zone (HRZ). However, in more recent years, the value of perennial pastures to reduce recharge has been questioned in areas with >600 mm annual rainfall. Currently, pastures dominated by annual species with relatively low productivity occur across much of the HRZ where deep drainage is most likely contributing to recharge. This review outlines our current understanding of water use by various herbaceous species, and indicates ways in which their water use may be increased in the HRZ of southern Australia.To reduce deep drainage in the HRZ, the soil water deficit must be increased prior to the opening autumn rains. This will allow a greater storage of water before any potential deep drainage occurs. There are two ways that this can be achieved with the use of herbaceous species. Firstly, change to or encourage species that use more water annually. Although plants with deeper root systems including lucerne have the ability to dry the soil to depth, a combination of winter-and summer-active species, rotational grazing, and pasture spelling would extend the active growing season and soil water use of annual and perennial species. A second option is to increase the productivity of the pasture, as there is a direct link between growth and water use. For example, improving pasture productivity by 50%, say from 8 to 12 t dry matter/ha, could use (transpire) approximately 160 mm more water annually by a C 3 species, irrespective of evaporation from the soil surface or evaporative demand factors. This is supported by strong correlations between plant dry mass and water use among a wide range of C 3 and C 4 plants of diverse growth form and habitat. This relationship appears to have been overlooked in recent studies of various components of the soil water balance model, possibly due to limited and unreliable estimates of evapotranspiration (ET). An improved relationship between 'estimated' ET and measured dry matter production should improve the capability of the soil water balance model to predict deep drainage, which is primarily dependent on the ET. Ways to increase pasture productivity and soil water use include regular applications of fertiliser and lime, and better management of waterlogged and acidic soils in the HRZ. Summer-active native species may also be useful on soils where the persistence of other deep-rooted perennials is poor; however, little is known about their productivity and persistence when heavily grazed.We believe that the relationship between water use and pasture production needs to be reassessed to improve the predictability of the soil water balance approach and recommend further research in both the field and under controlled conditions to determine the potential for increased water use in the HRZ of southern Australia by combinations of plant species and greater pasture productivity.A R 0 2 0 8 3 W a t e r u ...

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Artificial Intelligence as a Tool for Conservation and Efficient Utilization of Renewable Resource

Vinay

Bale

Tiwari

et al. 2022

Artificial Intelligence for Renewable Energy Systems

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Crop-Water Production Functions

Cited by 149 publications

References 40 publications

Crop Yield and Water Requirement Relationships for Major Irrigated Crops in Southern Alberta

Crop Yield and Water Requirement Relationships for Major Irrigated Crops in Southern Alberta

Maximising the use of soil water by herbaceous species in the high rainfall zone of southern Australia: a review

Artificial Intelligence as a Tool for Conservation and Efficient Utilization of Renewable Resource

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