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- W151749319 abstract "Irrigated cropping systems on the High Plains aredominated by water intensive continuous corn (Zea mays L.)production, which along with other factors has caused a decline inthe Ogallala aquifer. Potentially demand for water from the aquifercould be decreased by including drought tolerant crops, like grainsorghum (Sorghum bicolor L.) and cotton (Gossypium hirsutum L.), inthe cropping systems. This study calibrated the CERES-Maize,CERES-Sorghum, and CROPGRO-Cotton models for the High Plains andstudied the simulated effects of different irrigation amounts andinitial soil water contents on corn, cotton, and grain sorghum.Input files for calibration were created from irrigated and drylandresearch plots across Kansas. Information was collected on: soilphysical properties, dry matter, leaf area, initial and final soilwater content, management, and weather. CERES-Maize simulated grainyield, kernel number, ear number, and seed weight across thelocations with root mean square errors (RMSE) of 2891 kg ha-1, 1283kernels m-2, 1.6 ears m-2, and 38.02 mg kernel-1, respectively.CERES-Sorghum simulated grain yield, kernel number, head number,and seed weight with RMSEs of 2150 kg ha-1, 5755 kernels m-2, 0.13heads m-2, and 4.51 mg kernel-1. CROPGRO-Cotton simulated lintyield and boll number with RMSEs of 487 kg ha-1 and 25.97 bollsm-2. Simulations were also conducted with CERES-Maize,CERES-Sorghum, and CROPGRO-Cotton to evaluate the effects ofirrigation amounts and initial soil water content on yield,evapotranspiration (ET), water use efficiency (WUE), availablesoil water at maturity, and gross income per hectare. Simulationsused weather data from Garden City, KS from 1961 to 1999.Irrigation amounts were different for all variables for corn andgrain sorghum. For cotton, yield, WUE, soil water, and gross incomewere not different between the top two irrigation amounts. Forcorn and grain sorghum, initial soil water content was onlydifferent at 50% plant available water. Initial soil water had noaffect on cotton, except for ET at 50%. Simulations showed thatcotton yields are similar at lower irrigation. Also, croppingsystems that include cotton have the potential to reduce overallirrigation demand on the Ogallala aquifer, potentially prolongingthe life of the aquifer." @default.
- W151749319 created "2016-06-24" @default.
- W151749319 creator A5068852815 @default.
- W151749319 date "2007-05-08" @default.
- W151749319 modified "2023-09-23" @default.
- W151749319 title "Improving irrigated cropping systems on the high plains using crop simulation models" @default.
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