Nitrogen use efficiency of maize and cotton

• Large farming companies are increasingly concerned with environmental indicators because of the external marked. Need to monitor farming practices.

Study:

• Data from 2011 to 2019 of 4,519 commercial fields (1.32 Mha) grown with maize and cotton
• 2 crops per year in different rotations2nd. season usually after soybeans
• N export (grain and link yields vs. Ncontent) and actual N applied to calculate N Surplus and NUE