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Changes in Soil Test Phosphorus Concentration After Application of Manure or Fertilizer

^a Dep. of Crop and Soil Sciences, Michigan State University, 286 Plant and Soil Sciences, East Lansing, MI 48824
^b Dep. of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, St. Paul, MN 55108

View larger version (25K): [in a new window]   Fig. 1. Soil test P concentration after application of manure and fertilizer for Port Byron, Verndale, and Ves soils without a previous history of manure application.

View larger version (29K): [in a new window]   Fig. 2. Soil test P response 1 and 9 mo after application of manure and fertilizer to Port Byron soils with and without previous manure application history.

View larger version (28K): [in a new window]   Fig. 3. Soil test P response 1 and 9 mo after application of manure and fertilizer to Verndale soils with and without previous manure application history.

View larger version (29K): [in a new window]   Fig. 4. Soil test P response 1 and 9 mo after application of manure and fertilizer to Ves soils with and without previous manure application history.