Conclusions:
• The SOYA management regime did increase yield above the UTC in the average-yielding environments. In the low-yielding environments, the SOYA treatments had no effect. It is likely that other environmental factors played a large role in overall yield levels for low-yielding environments. Likewise, in the high-yielding environments, the SOYA treatments did not increase yield levels above the control and high yields were obtained at generally lower harvest and seeded plant densities in comparison to the average and low-yielding environments; this finding together with the results from the low-yielding environments indicates that environmental factors play a larger role in attaining yield in comparison to plant density and management. Although specific products were found to increase yield (Study # 1), the SOYA system as a whole is very costly relative to current soybean market prices. It appears the grower would be better served by investing production dollars in planting more seeds/acre as this was a significant factor in higher yield across all environments.
• Three PhD candidates and two M.S. candidates have been working on this project. Plans are being made, and work progresses on publishing the results of this research through several manuscripts.
• Presentations of results were prepared and presented throughout the project. These highlight study objectives, procedures, and results. The project team travelled the U.S. extensively presenting those findings to farmers and other stakeholders in the soybean community.