Yield and Economic Response of Modern Cotton Cultivars to Nitrogen Fertilizer

Non-optimal application of nitrogen (N) fertilizer in cotton (Gossypium hirsutum L.) production systems often results from a producer’s uncertainty predicting the N rate that ensures maximum economic return. Residual soil nitrate-N (NO3-N) is also unaccounted for management decisions. In this study, lint yield and profitability two cultivars (FiberMax FM 958 Deltapine DP 1646 B2XF) were compared across five treatments [0 kg ha?1 (control), 45 (N-45), 90 (N-90), 135 (N-135), 180 (N-180)] 2018 to 2020. For both cultivars, additional on top control treatment did not increase cotton. each year, N-45 resulted greatest revenue above variable costs (RAVC) values all cultivars. The improved partitioning efficiency newer high levels residual NO3-N allowed sustained plant growth even with reduced application. Overall, show advantage reducing inputs N-rich soils maintain profits. These findings are important promoting more sustainable agricultural through chemical maintained health.