Water productivity under strategic growth stage-based deficit irrigation in maize

Comas, Louise H.; Trout, Thomas J.; DeJonge, Kendall C.; Zhang, Huihui; Gleason, Sean M.

doi:10.1016/j.agwat.2018.07.015

Cited by 133 publications

(94 citation statements)

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“…These strategies are referred to as deficit, limited and/or regulated irrigation management practices (Sarkar et al, ). However, effective management of cropping systems and irrigation water in the face of limited water resources also depends on the ability to consider the cost–benefit of applying deficit irrigation measures (Comas et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…These strategies are referred to as deficit, limited and/or regulated irrigation management practices (Sarkar et al, 2012). However, effective management of cropping systems and irrigation water in the face of limited water resources also depends on the ability to consider the costbenefit of applying deficit irrigation measures (Comas et al, 2019). In this experimental research, various considerations such as OFR construction, irrigation systems and their operation and maintenance, interest rate at 7% per annum, cost of cultivation, and yield and market prices are taken into account in order to analyse crop and water productivity and cost (Araya et al, 2019).…”

Section: )mentioning

confidence: 99%

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ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†

Reddy

Ricart

Maruthi

et al. 2020

Irrigation and Drainage

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An integrated farming system (IFS) aims to sustain agricultural production, maintain farm incomes, safeguard the environment and respond to climate change impacts. Experiments in a tribal farmer's fields during 2016–2018 with two IFS models (pulse and cotton) were conducted in the Telangana region, India. An on‐farm reservoir (OFR) is designed for storing surface runoff based on the area and runoff coefficient determined through a modelling approach. The results demonstrated how supplemental irrigation and water harvesting are the most important and proven technologies for improving crop productivity and the efficient use of water in dryland areas of the semi‐arid tropics. The economic analysis indicated that after introduction of OFR technology, farmers' profits were increased under both scenarios of prolonged and short dry spells. According to the results, adoption of the OFR and IFS models not only ensured economic returns but provided regular employment even on less than 1 ha of land, which is usually non‐sustainable if monocropping is being practised. The approaches used in this work might be useful for guiding producers’ decisions in optimizing resources and selecting crops based on economic and water use efficiency. © 2020 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Section: )mentioning

confidence: 99%

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†

Reddy

Ricart

Maruthi

et al. 2020

Irrigation and Drainage

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“…The impact of water stress on crop productivity varies with growth stage (Comas et al, 2019; Doorenbos and Kassam, 1979; Geerts and Raes, 2009; Hanks, 1983). Many annual seed‐producing crops have varying responses to water stress during early plant formation, vegetative growth, flowering and seed formation, seed growth, and maturation stages.…”

Section: Model Developmentmentioning

confidence: 99%

“…Many annual seed‐producing crops have varying responses to water stress during early plant formation, vegetative growth, flowering and seed formation, seed growth, and maturation stages. Thus, many crops have multivariate WPFs, and the final grain yield is a summation of the impacts of stress at each growth stage (Comas et al, 2019; Doorenbos and Kassam, 1979; Hanks, 1974). Conceptually, each crop has an optimum distribution of a seasonal water deficit across the season that minimizes yield loss.…”

Section: Model Developmentmentioning

confidence: 99%

“…Strategically distributed seasonal deficits (i.e., deficits are applied first to the least sensitive growth stages) tend to result in curvilinear WPFs that are concave downward (negative second derivative) because deficits are initially applied at stages when the effect on yield is least, while severe deficits affect more yield‐sensitive stages. Several studies with strategic water deficits have measured concave WPFs (Comas et al, 2019; Geerts and Raes, 2009; Manning et al, 2018; Trout and DeJonge, 2017). In this paper, a univariate crop WPF is used that represents a strategic within‐season distribution of available water to the crop.…”

Section: Model Developmentmentioning

confidence: 99%

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An Economic and Biophysical Model of Deficit Irrigation

Trout

Manning

2019

Agronomy Journal

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Competition for scarce water resources may lead to high water prices. Agricultural producers can adapt to increasing water price by adjusting irrigation management strategies. When water prices are high, deficit irrigation, the purposeful reduction of irrigation to reduce water use while accepting reduced yield, may increase net income. Deficit irrigation decisions depend on economic, biological, and physical conditions. A model based on relationships among the amount and cost of irrigation water applied, water productivity, and the value of water saved and crop yield was developed to assist farmers making deficit irrigation decisions. A model application for irrigated maize (Zia mays L.) production in northeast Colorado illustrates conditions under which deficit irrigation increases net income. High water costs and low crop prices favor deficit irrigation. When water has value for leasing, the combination of deficit irrigation production to reduce water use and water leasing may increase net income. Sufficiently high lease prices and low commodity prices favor rainfed production or fallowing. Core Ideas Deficit irrigation may increase net farm income. Expensive water, low crop prices, and high elasticity of water productivity favor deficit irrigation. Combining economic with biophysical models improves applicability.

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Deficit irrigation impacts on greenhouse gas emissions under drip‐fertigated maize in the Great Plains of Colorado

et al. 2022

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Precise water and fertilizer application can increase crop water productivity and reduce agricultural contributions to greenhouse gas (GHG) emissions. Regulated deficit irrigation (DI) and drip fertigation control the amount, location, and timing of water and nutrient application. Yet, few studies have measured GHG emissions under these practices, especially for maize (Zea mays L.). The objective was to quantify N 2 O and CO 2 emission from DI and full irrigation (FI) within a drip-fertigated maize system in northeastern Colorado. During two growing seasons of measurement, treatments consisted of mild, moderate, and extreme DI and FI. Deficit irrigation was managed based on growth stage so that full evapotranspiration (ET) was met during the yield-sensitive reproductive stage, but less than full crop ET was applied during the late vegetative and maturation growth stages. In the first year, mild DI (90% ET) reduced N 2 O emissions by 50% compared with FI. In the second year, compared with FI, moderate DI (69-80% ET) reduced N 2 O emissions by 15%, and extreme DI (54-68% ET) reduced N 2 O emissions by 40%. Only extreme DI in the second year significantly reduced CO 2 emissions (by 30%) compared with FI. Mild DI reduced yield-scaled emissions in the first year, but moderate and extreme DI had similar yield-scaled emissions as FI in the second year. The surface drip fertigation resulted in total GHG emissions that were one-tenth of literature-based measurements from sprinkler-irrigated maize systems. This study illustrates the potential of DI and drip fertigation to reduce N 2 O and CO 2 emissions in irrigated cropping systems.

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Water productivity under strategic growth stage-based deficit irrigation in maize

Cited by 133 publications

References 35 publications

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†

An Economic and Biophysical Model of Deficit Irrigation

Deficit irrigation impacts on greenhouse gas emissions under drip‐fertigated maize in the Great Plains of Colorado

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Water productivity under strategic growth stage-based deficit irrigation in maize

Cited by 133 publications

References 35 publications

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA†

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA†

An Economic and Biophysical Model of Deficit Irrigation

Deficit irrigation impacts on greenhouse gas emissions under drip‐fertigated maize in the Great Plains of Colorado

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Product

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ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†

ECONOMIC ASSESSMENT OF WATER HARVESTING PLUS SUPPLEMENTAL IRRIGATION FOR IMPROVING WATER PRODUCTIVITY OF A PULSE–COTTON BASED INTEGRATED FARMING SYSTEM IN TELANGANA, INDIA^†