Laboratory assessment of nitrogen mineralization in a wheat-based rotation trial
1997
Hasbany, R. | Atallah, T. (Lebanese Univ., Beirut (Lebanon). Faculty of Agriculture) | Garabet, S. | Ryan, J. (ICARDA, Aleppo (Syria))
The extent to which organic matter is mineralized during the growing season has a major impact on the extent of crop response to fertilization, especially with nitrogen. In long-term trials at Tel Hadya, organic matter and total soil N levels have gradually been influenced by rotations and soil management. In this laboratory study of factors associated with N mineralization, maximum mineral N was produced by incubation at around field capacity at 24 to 30EC. Wetting and drying also increased mineralization. Maximum N mineralization occurred in soil from Medicago plots and least for lentil. This study provides the basis for examining mineralization in situ in these rotation trials. This should add to our overall understanding of the dynamics of soil N in Mediterranean regions
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