Loss of mineral nitrogen from soil

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Abstract
1. The pattern of downward movement of nitrate in light soil is different from that in heavy clay soil of the kind used in this work.2. In light sandy soils, where vertical structural fissures are absent, nitrate becomes distributed down the profile on leaching.3. In heavy soils, which are well fissured and possess a gleyed horizon of partially decomposed plant debris at cultivation depth, most of the nitrate disappears from the profile after removal, by leaching or denitrification, from the cultivation layer.4. There is little difference in the amount of rain required to remove nitrate from the surface layers of light or heavy soil.5. Heavy and continuous rain is required to remove nitrate completely from either light or heavy soils.6. Nitrification of ammonium sulphate is more rapid in summer than winter, but nitrification does proceed slowly during winter.7. Ammonium nitrogen is not leached from the surface layer of either light or heavy soil.
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