Ammonium-N 第1页

Characteristics of Absorbing Ammonium and Nitrate Nitrogen of Six Crops at Different Growth Stages Experimental study on nitrogen leaching in a direct-seeding rice paddy of Taihu Lake Basin Spatial distribution of soil nitrogen in gully hillsides of Sejila Mountain, Southeastern Tibet Effects of long term plant Medicago sativa Linn. on soil nitrogen nutrient