Tuesday, November 14, 2006

Environmentally Neutral N and P Application and Its Relationship to Forage Yield After 10 Yrs of Application.

A. V. Rodd1, Jason Wells2, Robert Gordon2, John A. MacLeod3, and Ali Madani2. (1) AAFC, 4016 Southampton Rd, Nappan, NS B0L 1C0, Canada, (2) Nova Scotia Agricultural College, P.O. Box 550, Truro, NS B2N 5E3, Canada, (3) Agriculture and AgriFood Canada, Crops and Livestock Research Center, AAFC, 440 University Ave, Charlottetown, PE C1A 4N6, Canada

Excess application of manure can have detrimental effects on the environment through the buildup of excess N and P.   The environmentally neutral point for manure application is where the amount of N and P taken up by the plant is equal to the amount of N and P applied.  The relationship between forage yield and the break points are shown after 10 years of semi-solid beef manure application to forage grown on dykeland and upland soils.  Various weather condition scenarios had little impact on the N and P breakpoints.

Handout (.pdf format, 1096.0 kb)