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Microbial Nitrogen Transformations in Response to Treated Dairy Waste in Agricultural Soils

^a Dep. of Soil Science, North Carolina State Univ., Raleigh, NC 27695
^b Dep. of Plants, Soils, and Biometeorology, Utah State Univ., Logan, UT 84322

View larger version (37K): [in a new window]   Fig. 1. Soil NH+4– and NO–3–N pool sizes of two depth intervals in various soil treatments in June (early growing season) and in November (after harvest). Values are means and standard errors for n = 4. Control, soil without N fertilization; AS, soil fertilized with (NH4)2SO4; DC, soil fertilized with dairy-waste compost; LS, soil fertilized with dairy-waste lagoon effluent; application rates equivalent to available N of 100 and 200 kg N ha–1.