Analysis of a precision agriculture approach to cotton production

The hope of precision agriculture is that through more precise timing and u sage of seed, agricultural chemicals and irrigation water that higher econo mic yields can occur while enhancing the economic production of field crops and protecting the environment. The analyses performed in this manuscript demonstrate proof of concept of how precision agriculture coupled with crop simulation models and geographic information systems technology can be use d in the cotton production system in the Mid South to optimize yields while minimizing water and nitrogen inputs. The Hood Farm Levingston Field, loca ted in Bolivar County, Mississippi, next to the Mississippi River, was chos en as the test sight to obtain a one hectare soil physical property grid ov er the entire 201 ha field. The 1997 yield was used as a comparison for the analysis. Actual cultural practices for 1997 were used as input to the mod el. After the 201 simulations were made using the expert system to optimize for water and nitrogen on a one hectare basis, the model predicted that an increase of 322 kg/ha could be obtained by using only an average increase of 2.6 cm. of water/ha and an average decrease of 35 kg N/ha. Published by Elsevier Science B.V.