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Published online 21 June 2006
Published in Soil Sci Soc Am J 70:1328-1337 (2006)
DOI: 10.2136/sssaj2005.0189
© 2006 Soil Science Society of America
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Soil Nitrogen and Nutrient Dynamics after Repeated Application of Treated Dairy-Waste

Mussie Y. Habteselassiea, Bruce E. Millerb, Seth G. Thackera, John M. Starkc and Jeanette M. Nortona,*

a Dep. of Plants, Soils, and Biometeorology
b Dep. of Agricultural Systems Technology and Education
c Dep. of Biology, Utah State Univ., Logan, UT 84322


Figure 1
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  		Fig. 1. Preseason nitrate and ammonium pool sizes for two depth intervals in cornfield soils that received dairy-waste compost (DC), liquid-dairy waste (LW), or ammonium sulfate (AS) to supply about 100 and 200 kg available N ha–1 annually for 6 yr. Values represent means ±1 SE (n = 4).

 

Figure 2
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  		Fig. 2. Postharvest nitrate concentration at different depth intervals for field soils that received dairy-waste compost (DC), liquid dairy waste (LW) or ammonium sulfate (AS) to supply about 100 and 200 kg available N ha–1 for Years 1999 through 2002. Values represent means ±1 SE (n = 4).

 

Figure 3
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  		Fig. 3. Nitrification potential for cornfield soils that received dairy-waste compost (DC), liquid dairy waste (LW), or ammonium sulfate (AS) to supply about 100 and 200 kg available N ha–1 annually for 6 yr. Soil samples were collected 90 d after planting time. Values represent means ±1 SE (n = 4).

 




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