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Soil Fertility - Past and Present | |
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Ancient Records | |
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Soil Fertility During the First Eighteen Centuries A.D. | |
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Progress During the Nineteenth Century | |
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The Development of Soil Fertility in the United States | |
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Increasing Crop Yields | |
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Looking to the Twenty-first Century | |
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Growth and the Factors Affecting It | |
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Factors Affecting Plant Growth | |
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Growth and Growth Expressions | |
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Modeling Applications in Soil Fertility | |
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Elements Required in Plant Nutrition | |
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Essentiality of Elements in Plant Nutrition | |
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Elements Required in Plant Nutrition | |
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Function of Nutrients in Plants: Macronutrients | |
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Function of Nutrients in Plants: Micronutrients | |
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Basic Soil-Plant Relationships | |
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Ion Exchange in Soils | |
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Movement of Ions from Soils to Roots | |
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Ion Absorption by Plants | |
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Soil and Fertilizer Nitrogen | |
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The N Cycle | |
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N Fixation by Rhizobium and Other Symbiotic Bacteria | |
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N Fixation by Nonsymbiotic Soil Microorganisms | |
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N Addition from the Atmosphere | |
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Industrial Fixation of N | |
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Forms of Soil N | |
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Forms of N Absorbed by Plants | |
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N Transformations in Soils | |
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Fertilizer N Materials | |
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Soil and Fertilizer Phosphorus | |
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The P Cycle | |
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P Fertilizers | |
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Soil and Fertilizer Potassium | |
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K Content of Soils | |
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Forms of Soil K | |
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Soil Factors Affecting K Availability | |
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Plant Factors Affecting K Availability | |
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K Soil Testing | |
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K Fertilizers | |
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Agronomic Value of K Fertilizers | |
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Soil and Fertilizer Sulfur, Calcium, and Magnesium | |
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Sulfur | |
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Calcium | |
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Magnesium | |
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Micronutrients and Other Beneficial Elements in Soils and Fertilizers | |
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General Relationships of Micronutrients in Soils | |
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Iron | |
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Zinc | |
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Copper | |
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Manganese | |
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Boron | |
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Chloride | |
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Molybdenum | |
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Cobalt | |
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Sodium | |
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Silicon | |
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Selenium | |
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Soil Acidity and Basicity | |
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General Concepts | |
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Soil Acidity | |
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The Soil as a Buffer | |
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Determination of Active and Potential Acidity in Soils | |
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Soil pH for Crop Production | |
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Liming Materials | |
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Use of Lime in Agriculture | |
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Application of Liming Materials | |
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Factors Determining the Selection of a Liming Program | |
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Acidulating the Soil | |
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Saline, Sodic, and Saline/Sodic Soils | |
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Soil Fertility Evaluation | |
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Nutrient-Deficiency Symptoms of Plants | |
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Plant Analyses | |
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Biological Tests | |
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Soil Testing | |
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Remote Sensing | |
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Fundamentals of Fertilizer Application | |
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Crop Characteristics | |
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Soil Characteristics | |
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Fertilizer Placement | |
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General Considerations | |
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Utilization of Nutrients from the Subsoil | |
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Fluid Fertilizers | |
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Fertilizers, Water Use, and Other Interactions | |
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Nutrient-Water Interactions | |
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Other Interactions | |
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Economics of Plant-Nutrient Use | |
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Fertilizer Use and Prices | |
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Maximum Economic Yield | |
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Yield Level and Unit Cost of Production | |
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Returns per Dollar Spent or Profit per Acre | |
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What Is the Most Profitable Rate of Plant Nutrients? | |
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Price of Fertilizer in Relation to the Value of the Crop | |
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Price per Pound of Nutrients | |
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Liming | |
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Animal Wastes | |
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Plant Nutrients as Part of Increasing Land Value | |
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Additional Benefits from Maximum Economic Yields | |
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Cropping Systems and Soil Management | |
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Soil and Crop Productivity | |
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OM in the Soil | |
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Tillage | |
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Legumes in the Rotation | |
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Rotations Versus Continuous Cropping | |
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Winter Cover/Green Manure Crops | |
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Animal Manure | |
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Sewage | |
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Common Conversions and Constants | |
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Index | |