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High-Yield Irrigated Maize In The Western U.S. Corn Belt: I. On-Farm Yield, Yield Potential, And Impact Of Agronomic Practices, Patricio Grassini, John Thorburn, Charles Burr, Kenneth Cassman
High-Yield Irrigated Maize In The Western U.S. Corn Belt: I. On-Farm Yield, Yield Potential, And Impact Of Agronomic Practices, Patricio Grassini, John Thorburn, Charles Burr, Kenneth Cassman
Department of Agronomy and Horticulture: Faculty Publications
Quantifying the exploitable gap between average farmer yields and yield potential (YP) is essential to prioritize research and formulate policies for food security at national and international levels. While irrigated maize accounts for 58% of total annual maize production in the Western U.S. Corn Belt, current yield gap in these systems has not been quantified. Our objectives were to quantify YP, yield gaps, and the impact of agronomic practices on both parameters in irrigated maize systems of central Nebraska. The analysis was based on a 3-y database with field-specific values for yield, applied irrigation, and N …
High-Yield Irrigated Maize In The Western U.S. Corn Belt: Ii. Irrigation Management And Crop Water Productivity, Patricio Grassini, Haishun Yang, Suat Irmak, John Thorburn, Charles Burr, Kenneth G. Cassman
High-Yield Irrigated Maize In The Western U.S. Corn Belt: Ii. Irrigation Management And Crop Water Productivity, Patricio Grassini, Haishun Yang, Suat Irmak, John Thorburn, Charles Burr, Kenneth G. Cassman
Department of Agronomy and Horticulture: Faculty Publications
Appropriate benchmarks for water productivity (WP), defined here as the amount of grain yield produced per unit of water supply, are needed to help identify and diagnose inefficiencies in crop production and water management in irrigated systems. Such analysis is lacking for maize in the Western U.S. Corn Belt where irrigated production represents 58% of total maize output. The objective of this paper was to quantify WP and identify opportunities to increase it in irrigated maize systems of central Nebraska. In the present study, a benchmark for maize WP was (i) developed from relationships between simulated yield and seasonal water …