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Prof. Rajan Ghimire
Department of Plant and Environmental Sciences, New Mexico State University, Las Cruces, NM 88003, USA

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0 Sustainable Agriculture
0 greenhouse gas emissions
0 Nutrient cycling
0 soil health
0 Soil organic matter

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Preprint
Published: 17 September 2018
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Studies on N balance due to N inputs and outputs and soil N retention to measure cropping system performance and environmental sustainability are limited due to the complexity of measurements of some parameters. We measured N balance based on N inputs and outputs and soil N retention under dryland agroecosystem affected by cropping system and N fertilization from 2007 to 2011 in the northern Great Plains, USA. Cropping systems were conventional tillage barley (Hordeum vulgaris L.)-fallow (CTB-F), no-tillage barley-fallow (NTB-F), no-tillage barley-pea (Pisum sativum L.) (NTB-P), and no-tillage continuous barley (NTCB). Nitrogen rates to barley were 0, 40, 80, and 120 kg N ha-1. Total N input due to N fertilization, pea N fixation, soil N mineralization, atmospheric N deposition, nonsymbiotic N fixation, and crop seed N and total N output due to grain N removal, denitrification, volatilization, N leaching, gaseous N (NOx) emissions, surface runoff, and plant senescence were 28 to 37% greater with NTB-P and NTCB than CTB-F and NTB-F. Total N input and output also increased with increased N rate. Nitrogen sequestration rate at 0 to 10 cm averaged 22 kg N ha-1 yr-1 for all treatments. Nitrogen deficit ranged from 5 to 16 kg N ha-1 yr-1, with greater deficits for CTB-F and NTB-P and higher N rates. Because of increased grain N removal and reduced N loss to the environment and N fertilizer requirement, NTB-P with 40 kg N ha-1 can enhance agronomic performance and environmental sustainability while reducing N inputs compared to other management practices.

ACS Style

Upendra Sainju; Rajan Ghimire; Gautam Pradhan. Improving Dryland Cropping System Nitrogen Balance with No-Tillage and Nitrogen Fertilization. 2018, 1 .

AMA Style

Upendra Sainju, Rajan Ghimire, Gautam Pradhan. Improving Dryland Cropping System Nitrogen Balance with No-Tillage and Nitrogen Fertilization. . 2018; ():1.

Chicago/Turabian Style

Upendra Sainju; Rajan Ghimire; Gautam Pradhan. 2018. "Improving Dryland Cropping System Nitrogen Balance with No-Tillage and Nitrogen Fertilization." , no. : 1.