Robert Parnes
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This book has four parts. The Frist part discusses the importance of organic residues to soil fertility and proposes an energy index for comparing organic and inorganic fertilizers; addresses the controversy regarding the effect of organic and inorganic fertilizers on food quality; and discusses options for determining fertilizer applications. The second part covers the range of organic fertilizers including unprocessed locally available residues and compost as well as cover crops; processed wastes; and commercial organic fertilizers. The third part has a chapter for each soil nutrient, except for a single chapter on trace elements. Each chapter describes the importance of the nutrient to the plant; its behavior in the soil; and common organic and inorganic fertilizers and application rates. The _nal part consists of four appendices which contain the only use of chemical and mathematical equations in the book. Appendix A is a collection of conversion xi Preface factors that may be useful. Appendix B presents the details of the argument behind the energy credit proposed for organic matter in Chapter 2. Appendix C calculations on the liming value and acidity of various fertilizers. Appendix D contains a derivation of graphs in _figure 7.1 showing the loss of organic matter in a composting process under different conditions.
1 Introduction
2 Essentials of Soil Fertility
2 1 Organic
Matter and Biological Activity
2 2 Air and Water
3 Food Quality
3 1
Summary
3 2 Food
Quality
3 3 Organic
Versus NPK Fertilizers
3 4 E_ects of
Environment and Culture on Quality
4 Nutrient Requirements
4 1
Summary
4 2
Fertilizer Uptake
5 Soil Nutrient Supply
5 1
Summary
5 2 Methods
Of Evaluating The Soil
5 3 A Survey
Of Soils
II Organic
Fertilizers
6 Unprocessed Residues
6 1
Summary
6 2 Animal
Manure
6 3 Hay And
Straw
6 4 Other
Local Residues
7 Compost
7 1
Summary
7 2 Hot
Composting
7 3 Cold
Composting
7 4 Manure In
Compost
7 5 Nutrient
Value of Compost
8 Other Organic Fertilizers
8 1
Summary
8 2 Cover
Crops
8 3 Organic
Byproducts
8 4
Commercial Organic Products
8 5 Soil
Activators
III
Nutrients and Fertilizers
9 Introduction to Part III
9 1
Summary
9 2
Fertilizer Blends
9 3 Cations
and Anions
10 Nitrogen
10 1
Summary
10 2 Nitrogen
In The Plant
10 3 Nitrogen
In The Soil
10 4 Nitrogen
Fertilizers
11 Phosphorus
11 1
Summary
11 2
Phosphorus In The Plant
11 3
Phosphorus In The Soil
11 4 Phosphorus
Fertilizers
12 Potassium
12 1
Summary
12 2
Potassium In The Plant
12 3
Potassium In The Soil
12 4
Potassium Fertilizers
13 Sulfur
13 1
Summary
13 2 Sulfur
In The Plant
13 3
Available Sulfur
13 4 Sulfur
Fertilizers
14 Calcium And Soil PH
14 1 Summary
14 2 Calcium
In The Plant
14 3 Calcium
In The Soil
14 4 Soil PH
And Cation Exchange
14 5 Calcium
Fertilizers
15 Magnesium
15 1 Summary
15 2
Magnesium In The Plant
15 3
Magnesium In The Soil
15 4
Magnesium Fertilizers
16 Micronutrients
16 1
Summary
16 2
Micronutrients In Plants
16 3
Micronutrients In The Soil
16 4 Sources
Of Micronutrients
IV
Appendices A Conversion Factors
B The Energy Index C Acid And Basic
Fertilizers
C 1 Cation Equivalents
C 2 Liming Fertilizers
C 3 Acidifying Fertilizers
D
Compost Losses
Glossary
Index
Bibliography
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