The total phosphorus content in manure varies depending on the animal species, age, diet, and how the manure has been stored. Concentration of phosphorus in some manures may be up to 80 to 90 lbs P2O5 per ton (some poultry manures, for example), whereas other manure may contain as little as 4 lbs P2O5 per ton. It will require a laboratory analysis to know for sure. When manure is applied to the soil, what percentage of this phosphorus is available to the crop during the first year? A large fraction of the phosphorus in manure is considered to be plant available [...]
The Illinois Soybean Association (ISA) checkoff and membership programs represent more than 43,000 soybean farmers in Illinois. The checkoff funds market development and utilization efforts while the membership program supports the government relations interests of Illinois soybean farmers at the local, state, and national level, through the Illinois Soybean Growers (ISG). ISA upholds the interests of Illinois soybean producers through promotion, advocacy, and education with the vision of becoming a market leader in sustainable soybean production and profitability.