Soil Fertility and FertilizersFertilizers in a changing world. Soil fertility - past and present. Growth and the factors affecting it. Elements required in plant nutrition. Basic soil-plant relationships. Soil and fertilizer: phosphorus, potassium, sulfur, calcium, and magnesium. Micronutrients and other beneficial elements in soils and fertilizers. Fertilizer manufacture. Soil acidity and liming. Soil fertility evaluation. Fundamentals of fertilizer application. Cropping systems and soil management. Ecomomics of plant-nutrient use. Fertilizers and efficient use of water. Interaction of plant nutrients in a high-yield agriculture. |
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Page 299
... fraction is comprised of organic sulfur that is re- duced to H2S by hydriodic acid . Its sulfur is not bonded directly to carbon and is believed to be largely in the form of sulfate esters and ethers with C - O - S link- ages . Examples ...
... fraction is comprised of organic sulfur that is re- duced to H2S by hydriodic acid . Its sulfur is not bonded directly to carbon and is believed to be largely in the form of sulfate esters and ethers with C - O - S link- ages . Examples ...
Page 316
... fraction , although there were changes in all sulfur fractions . Changes in the carbon - bonded sulfur fraction were due mainly to decomposition of the sulfur - containing amino acids . Studies of the soil organic sulfur fraction ...
... fraction , although there were changes in all sulfur fractions . Changes in the carbon - bonded sulfur fraction were due mainly to decomposition of the sulfur - containing amino acids . Studies of the soil organic sulfur fraction ...
Page 505
... fractions show higher efficiencies relative to the < 100 fraction the lower the reference pH . Amounts of a particular limestone fraction needed to produce a given rise in pH 2 years after application are shown graphically in Figure 11 ...
... fractions show higher efficiencies relative to the < 100 fraction the lower the reference pH . Amounts of a particular limestone fraction needed to produce a given rise in pH 2 years after application are shown graphically in Figure 11 ...
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Common terms and phrases
absorbed acid soils activity adsorption Agriculture Agron Alberta aluminum ammonium phosphate ammonium sulfate amounts anhydrous ammonia anions application areas 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 Figure fixation fraction granules H₂O hydrolysis important increase influence ions iron lb/A leaching legumes levels lime magnesium manganese micronutrients molybdenum neutral nitrate nitrification nitrogen fertilizers nutrition occur organic matter oxides P₂O particles phos phosphate fertilizers phosphate rock phosphorus plant growth plant nutrients plant roots polyphosphate Potash production reaction release residues response salts selenium sodium soil moisture 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