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Elements Required in Plant Nutrition
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absorbed acid soils activity adsorption Agriculture Agron Alberta aluminum ammonium phosphate amounts anhydrous ammonia anions application boron calcareous soils calcium carbon cation exchange cation exchange capacity chelates chemical chloride clay minerals colloids compounds concentration containing copper corn crops deficiency denitrification dicalcium phosphate diffusion effect elemental sulfur exchange capacity factors fertilizer materials fertilizer phosphorus Figure fixation fraction granule hydrolysis important increase influence ions iron lb/A leaching legumes levels lime magnesium manganese micronutrients molybdenum neutral NH4+ nitrate nitrification nitrogen fertilizers nutrition occur organic matter oxides particles phos phosphate fertilizers phosphate rock phosphorus plant growth plant nutrients plant roots polyphosphate production reaction release residues response retention salts selenium sodium soil moisture soil organic soil pH Soil Sci soil solution soluble sources soybeans SSSA Proc sulfate sulfuric acid superphosphate supply surface Table temperature uptake urea water-soluble wheat yield zinc