Global Maize Project in the United States: Ames, Iowa

The objective of this study is to determine whether or not an ecological intensification (EI) approach can increase yields more quickly over time than current farmer practice. The study design is a split plot. The main plot is management system: 1) farmer practice (FP), and 2) EI. The split plot is: 1) N application according to the management system, and 2) no N. The treatments are in a randomized complete block, with four replications.

Data from 2012 have yet to be analyzed. The site was affected by drought. In 2011, no significant differences in maize yield resulted from the differences in management practice. Maize in both systems did, however, respond to N additions, with both systems responding similarly. IPNI-26