Exchangeable ammonium and nitrate from different nitrogen fertilizer preparations in polyacrylamide-treated and untreated agricultural soils

Medicine & Life Sciences

• ammonium nitrate 100%
• Fertilizers 85%
• polyacrylamide 79%
• Soil 59%
• Nitrogen 54%
• Nitrification 43%
• Urea 37%
• dicyandiamido 29%
• Ammonium Sulfate 20%
• amidase 11%
• Potassium Chloride 9%
• Urease 9%
• Delayed-Action Preparations 9%
• Amides 9%
• Polymers 7%
• Molecular Weight 6%
• Water 5%

Agriculture & Biology

• agricultural soils 61%
• polyacrylamide 53%
• ammonium 51%
• nitrogen fertilizers 49%
• nitrates 45%
• urea 30%
• dicyandiamide 23%
• nitrification inhibitors 21%
• ammonium sulfate 14%
• fertilizers 11%
• soil 11%
• furrow irrigation 10%
• amidase 10%
• soil enzymes 10%
• soil erosion 9%
• nitrification 9%
• fertilizer rates 9%
• potassium chloride 9%
• urease 8%
• soil treatment 8%
• amides 8%
• irrigation water 7%
• polymers 5%

Earth & Environmental Sciences

• agricultural soil 56%
• urea 56%
• fertilizer 47%
• ammonium 45%
• nitrate 39%
• nitrogen 32%
• nitrification 30%
• ammonium sulfate 25%
• soil 23%
• inhibitor 20%
• furrow irrigation 16%
• potassium chloride 14%
• microcosm 11%
• rate 10%
• soil erosion 10%
• incubation 9%
• enzyme 8%
• polymer 8%
• irrigation 8%