The primary goals of this research are to improve the profitability of soybean and corn production systems by improving nutrient supply, soil physical properties, and subsequently crop yields through the use of poultry litter (PL) additions. Specifically, this research will allow us to gain a better understanding of how PL additions in corn-soybean production systems contribute/alter the nutrient content and physical properties of the soil, soybean cyst nematode (SCN) numbers and plant responses, and weed growth patterns. This understanding will be useful to producers and others as a whole to improve the profitability of production systems by improving yield and soil resources. A major goal...