Title: Evaluating Benefit from Over-winter Corn Crops
Principle Investigator: L.G. Bundy/ UW-Madison, Soil Science
Objective: To determine the effect of cover crop species on the beneficial effect on subsequent crop yields; determine the relationship between cover crop benefits and nitrogen rate applied to the subsequent crop; evaluate some cover crop management variables to obtain information about the mechanisms for the cover crop effect.
Funding Level: $11,620, $11,520, $11,920
Duration: 3 years
Title: Plant Availability of P from Manure Differing in P Concentration compared with Other P Sources
Principle Investigator: L.G. Bundy / UW-Madison, Soil Science
Objective: To determine the effects of dairy diet P concentrations on P losses in runoff from land-applied manure; compare plant availability of P in dairy manures, fertilizer P, and municipal sewage sludge; compare the effects of P additions from manures, P fertilizer, and biosolids on soil test P levels, and forms of P in soils.
Funding Level: $6340
Duration: 1 year
Title: Use of Surfactant-Modified Zeolite as Fertilizer Additives to Control Nitrate, Sulfate, and Phosphate Release
Principle Investigator: Zhaohui Li / UW-Parkside
Objective: To determine maximum amounts of nitrate, sulfate, and phosphate loading on SMZ; to determine the release of nitrate, sulfate, and phosphate; to study the mechanisms of anion release via desorption kinetic; to compare the reduction in leaching loss of nitrate and phosphate when SMZ is used; to evaluate the efficiency of using SMZ as additives to CRF’s in greenhouse scale.
Funding Level: $8,122, $8,307
Duration: 2 years
Title: Effect of Stand Age on Alfalfa Response to N and/or S and Confirmation of Alfalfa S Needs in Wisconsin
Principle Investigator: K.A. Kelling and P.E. Speth / UW-Madison, Soil Science
Objective: To determine if the S responses observed at Arlington in the 1993-1996 potassium trial are now typical for southern WI; to determine if S responses now observed in southern WI are stand-age related; to use multiple on-farm trials to field calibrate the WI “Sulfur Availability Index” (SAI) model.
Funding Level: $7,522, $7,900, $8,300
Duration: 3 years
Title: Evaluation of Dairy Manure Use in Potato Production Systems
Principle Investigator: K.A. Kelling / UW-Madison, Soil Science
Objective: To determine the availability and movement/accumulation (N and P) of manurial nutrients and the influence of manure on incidence and severity of potato common scab; evaluate the effect of time after manure applications on common scab incidence and severity; determine if potato production practices can be defined which allow for the integration of the potato and dairy industry.