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Creator:: Andrews, Nicholas, Sullivan, Dan M., and Pool, Kristin
Abstract:: Organic vegetable growers rely on legume cover crops as an economical source of plant-available N. This research evaluated N contributions to summer vegetable crops by cover crops (CC) residues by monitoring soil nitrate (NO3-N) concentrations during the summer crop growing season. Replicated field plots were established with three CC mixes:...
Resource Type:: Conference Proceeding
Full Text:: = sandy loam, sil = silt loam soil texture. b Date listed for maximum net NO3-N within each site-yr is

Creator:: Sullivan, Dan M., Cogger, Craig G., Bary, Andrew I., and Myhre, Elizabeth
Abstract:: Credits for available N from past manure applications are often used in nutrient management planning. However, it is difficult to verify the accuracy of these credits. The major objective of this study was to estimate long-term effects of manure application on soil N mineralization. Specific objectives were to: 1) estimate...
Resource Type:: Conference Proceeding and Presentation
Full Text:: Extension Publication, WREP 25. University of Alaska. Horneck, D.A., J.M. Hart, K. Topper and B. Koepsell

Creator:: Heinrich, Aaron and Sullivan, Dan M.
Abstract:: Following the surface application of urea to soil, there is the potential for nitrogen (N) loss from ammonia (NH3) volatilization until sufficient rain or irrigation has moved it into the soil. Many studies measuring NH3 loss have used laboratory and microplot field studies. The limitation of these techniques is that...
Resource Type:: Conference Proceeding
Full Text:: Volatilization. Soil Sci. Soc. of Am. Journal. 75:2341-2347 Jones, C., B. Brown, R. Engel, D. Horneck, and K

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