Impact of Nitrogen Fertilizer Sources on Ammonia Volatilization and Lint Yield in an Unirrigated Cotton Field

Evaluation of ammonia volatilization losses and lint yield of different fertilizer sources in cotton production systems using replicated small plots has been limited to non-existent. The objective of this trial was to (i) quantify ammonia volatilization from the N sources using a semi-closed chamber method and (ii) evaluate cotton response to N sources on lint yield of dryland cotton. The trial was set up as a RCBD with 3 treatments and replicated four times. The N source treatments include (i) Urea, (iii) Environmental Smart Nitrogen (ESN), and (iv) Urea Ammonium Nitrate (UAN) applied at 90 lbs. N/acre.