Abstract
This study compared N, P, and K concentrations in soils that received injected dairy manure and broadcast inorganic fertilizers for 3 years. Nitrogen from manure and inorganic fertilizer was applied at approximately 84, 168, and 252 kg N ha** minus **1yr** minus **1 in 1982 through 1984. Inorganic P and K fertilizers were applied to match the application rates for expected available P and K in the manure. Corn (Zea mays L. ) was grown on treatment plots in 1982 through 1985 at three locations in south-central Wisconsin. Silage and grain yield, nutrient uptake, and soil N, P, and K concentrations were determined. More total inorganic N in the soil profile and faster downward movement were found under the fertilizer treatments than the manure treatments. Greater loss of manure N from denitrification is suggested for this difference. The additional organic nutrient components of the manure resulted in more total N, P, and K applied than that applied from the inorganic fertilizer. Additional study results are discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1364-1369 |
| Number of pages | 6 |
| Journal | Transactions of the American Society of Agricultural Engineers |
| Volume | 30 |
| Issue number | 5 |
| State | Published - Sep 1987 |
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)