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Published online 29 September 2005
Published in Soil Sci Soc Am J 69:1844-1855 (2005)
DOI: 10.2136/sssaj2004.0361
© 2005 Soil Science Society of America
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Soil Moisture and Temperature Effects on Nitrogen Release from Organic Nitrogen Sources

S. Ageharaa,b,* and D. D. Warnckea

a Dep. of Crop and Soil Sciences, Michigan State Univ., East Lansing, MI 48824-1325
b Texas Agricultural Experiment Station, Texas A&M Univ., 1619 Garner Field Rd., Uvalde, TX 78801



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  		Fig. 1. Net cumulative N mineralized from soil organic matter at different soil moistures (a) and temperatures (b). Slopes in regression lines followed by the same letter are not significantly different at {alpha} = 0.05.

 


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  		Fig. 2. Net cumulative N released from four organic N sources at different soil moistures. The N0 or k0 values followed by the same letter are not significantly different at {alpha} = 0.05. AP, alfalfa pellets; BM, blood meal; CM, partially composted chicken manure.

 


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  		Fig. 3. Net cumulative N released from four organic N sources at different temperatures. The N0 or k0 values followed by the same letter are not significantly different at {alpha} = 0.05. AP, alfalfa pellets; BM, blood meal; CM, partially composted chicken manure.

 




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