.CONTENTS xi 



Piedmont Plateau, 80; Cotton soils of the Appalachian 

 Province, 81; Cotton soils of the limestone valleys 

 and uplands, 82; Cotton soils of the Loessial region, 

 83; Cotton soils of the River Flood Plains Province, 

 84; Cotton soils of the Great Plains Region, 85. 

 Climatic Adaptations: Length of growing season, 86; 

 Amount and distribution of the rainfall, 87; Tem- 

 perature and sunshine, 88. 



CHAPTER VIII 



Fertilizers, Manures and Rotations for Cotton 81-100 



Fertility removed by cotton, 89; Maintenance 

 of fertiUty, 90. Commercial Fertilizers for Cotton: 

 Nitrogen-supplying fertilizers, 91; Sodium nitrate 

 versus cotton-seed meal, 92; Cotton-seed versus cotton- 

 seed meal, 93; Need of cotton soils for nitrogen, 94; 

 Phosphatic fertilizers, 95; Need of cotton soils for 

 phosphoric acid, 96; Potassic fertilizers, 97; Need of 

 cotton soils for potash, 98; Potash fertilizers check 

 rust, 99; A fertilizer test for cotton, 100; Judging fer- 

 tilizer needs by appearance of plants, 101; Home- 

 mixing fertilizers, 102; Time of applying fertilizers, 

 103; Methods of applying fertilizers, 104; Fertilizer 

 formulas for cotton, 105. Farm Manures for Cotton: 

 Stable manure for cotton, 106; Composts for cotton, 

 107. Green-Manures and Rotations for Cotton: Need 

 of organic matter, 408; Suitable crops for green- 

 manurej 109; Green-manures and the supply of or- 

 ganic matter, 110; Green-manure crops and the nitro- 

 gen supply, 111; Will crop rotation maintain fertility, 

 112; Rotations for cotton, 113. 



CHAPTER IX 



Tillage for Cotton . . ... 101-116 



Preparation of the Seed-bed: Drainage the first es- 

 sential, 114; Disposal of stalks and litter, 115; Fall 

 plowing for cotton, 116; Spring plowing for cotton, 



