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Keyword [Organic nitrogen forms]
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1. The Evolution Of Humus And Organic Nitrogen Forms And Its Relation Of N Supply Capacity In Sheltered Soil
2. Effect Of Different Fertilization Management On Soil Carbon And Nitrogen For Wheat-maize Rotation
3. Soil Organic Nitrogen Forms And Their Contributions To Mineralizable Nitrogen In Water-stable Aggregates Of Paddy Soil In Black Soil Region
4. Inorganic and organic nitrogen forms in forest soils and their contributions to temperate, woody plant nutrition
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