Title: Manure Management and History Effects on Phosphorus Losses in Runoff From Land-Applied Manure in Corn Production
Principle Investigator: L.G. Bundy / UW-Madison, Soil Science
Objective: To determine the effect of manure application history on dissolved and total P losses in runoff and the effect of manure dry matter content (liquid vs. semi-solid) and management (unincorporated, incorporated, injected) on dissolved and total P losses in runoff; use this information to assist with calibration of P-index values for dissolved and total P losses in runoff; use this information to assist with identification of P-index levels at which more intensive management is needed based on dissolved or total P losses in runoff; a secondary component of this research will be to simultaneously determine N in runoff thus providing additional information on these management practice effects on N losses in runoff.
Funding Level: $15, 130, $15,720, $16,340
Duration: 3 years
Title: Reducing Phosphorus Fertilizer Application to Cranberry Beds
Principle Investigator: T. R. Roper / UW-Madison, Horticulture
Objective: To determine if the critical amount of P fertilizer for cranberries is below 20 kg P/h and if so where the critical value is; provide information for growers to encourage them to reduce phosphorus applications to minimize the risk of phosphorus entering surface waters from cranberry marshes.
Funding Level: $2,350, $2,350, $2,350
Duration: 3 years
Title: Water-availability of Phosphorus from Animal Manures and P Fertilizers Applied to Soils
Principle Investigator: L.R. Cooperband / UW-Madison, Soil Science
Objective: To quantify and compare the amounts of water-available P over time following application of manures and fertilizer P to soils; identify chemical and physical characteristics of soil, manure, soil-manure and soil-fertilizer P combinations that influence water-available P; characterize organic and mineral P forms in manure and manured soils over time and compare with known mineral P forms to identify mechanisms controlling P release to water.