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 156
... Effect on Germination and Seedling Growth . The damaging effect of high con- centrations of NH , and NH1 * and of NO2 on germinating seedlings is well known . An example of how rates of anhydrous ammonia reduced a stand of corn in field ...
... Effect on Germination and Seedling Growth . The damaging effect of high con- centrations of NH , and NH1 * and of NO2 on germinating seedlings is well known . An example of how rates of anhydrous ammonia reduced a stand of corn in field ...
Page 751
... effect of , on denitrification , 139-140 , on potassium availability , 244- 265 , tillage on , 636 Soil air ( see Air , soil ) Soil analysis ( see also Soil testing ) , chemical , methods used for , 553-557 ; determination of cations in ...
... effect of , on denitrification , 139-140 , on potassium availability , 244- 265 , tillage on , 636 Soil air ( see Air , soil ) Soil analysis ( see also Soil testing ) , chemical , methods used for , 553-557 ; determination of cations in ...
Page 754
... effect of , on addition of nitrogen to soil , 649 , on soil organic matter level , 649 ; residual effects of , 651 ; use of , for grazing , 651 ; value of , in reducing soil erosion , 650-651 Winter killing , of crops , effect of ...
... effect of , on addition of nitrogen to soil , 649 , on soil organic matter level , 649 ; residual effects of , 651 ; use of , for grazing , 651 ; value of , in reducing soil erosion , 650-651 Winter killing , of crops , effect of ...
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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