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• W2775889749 abstract "The use of hairy vetch as a winter cover crop for cotton production in Northwest Louisiana has contributed to sustaining cotton production as well as improving soil quality. To test the efficacy of hairy vetch (HV) cultivation as a natural N supplement for cotton production, a long-term field experiment lasting 27 years was evaluated using the Denitrification-Decomposition (DNDC) model. Different N fertilization practices, including 0 kg N ha− 1 (PL_1), HV alone (PL_2), 44.8 kg N ha− 1 (PL_3), and 67.3 kg N ha− 1 (PL_4), were compared to evaluate nitrogen (N) response to cotton yield. Measured crop yield from each treatment was used to calibrate and validate the model. The DNDC model was employed to test the effects of N application scenarios on cotton yields and HV incorporation on N balance under irrigated and non-irrigated conditions. In model calibration, statistical indices for the model performance on cotton seed yield showed that PL_1 had a normalized root mean square error (NRMSE) value of 24.5%, a model efficiency (ME) value of 0.51, and a correlation coefficient (r) of 0.87 (P < 0.01). The DNDC model was validated with PL_2, PL_3, and PL_4. PL_2, PL_3 and PL_4 had a NRMSE of 18.6%, 16.4% and 15.8% respectively, ME value of 0.19, 0.47 and 0.52 respectively, and an r of 0.75, 0.83 and 0.85 (P < 0.05) respectively. Estimates of soil organic carbon (SOC) for HV treatment showed double the SOC content during a 27-year long-term experiment, while both treatments of 44.8 kg N ha− 1 and 67.3 kg N ha− 1 showed similar levels of SOC of a 25% increase compared to the control. Based on the scenario analysis, sustainable cotton yields do not require N fertilizer application under HV cultivated fields, and no yield differences were observed between irrigated and non-irrigated conditions." @default.
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• W2775889749 date "2018-05-01" @default.
• W2775889749 modified "2023-10-12" @default.
• W2775889749 title "Modeling long-term effects of hairy vetch cultivation on cotton production in Northwest Louisiana" @default.
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• W2775889749 doi "https://doi.org/10.1016/j.scitotenv.2017.12.165" @default.
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