Midseason Estimates of Cotton Lint Yield Response to Nitrogen Fertilizer Using in-Season Plant-Based Indices

This poster presentation will provide a summary of a study that was initiated in 2008 in north Louisiana that intends to evaluate the use of cotton plant height, leaf nitrogen (N) content, chlorophyll readings, and remotely sensed-vegetation index (normalized difference vegetation index-NDVI) to estimate cotton lint yield response to N fertilizer. In the process, the optimal time or growth stage from which these plant variables should be collected to obtain the best estimate of cotton lint yield response to N fertilization will be also determined. An in-season plant-based estimate of lint yield response to N fertilizer is essential in developing a more precise N rate recommendation procedure for cotton.