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Nitrogen-fixing microorganisms in paddy soils (Part 1) Characteristics of the nitrogen fixation in paddy soils |
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| Authors: | Azuma Okuda Masuro Yamaguchi |
| Affiliation: | Faculty of Agriculture , Kyoto University , Japan |
| Abstract: | In most paddy soils, as is already well-known, the crop yield goes on decreasing just for the first few years and then stabilizes at a comparatively high level with no supply of fertilizer or manure. |
| Keywords: | available nitrogen near infrared spectroscopy poultry manure compost total nitrogen uric acid |