SOIL PROFILE N, P, AND K CHANGES FROM INJECTED LIQUID DAIRY MANURE OR BROADCAST FERTILIZER.

S. D. Comfort, P. P. Motavalli, K. A. Kelling, J. C. Converse

Research output: Contribution to journalArticle

10 Scopus citations

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 languageEnglish (US)
Pages (from-to)1364-1369
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume30
Issue number5
StatePublished - Sep 1987

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

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