X CONTENTS 



PAGE 



species, 36; The extensively cultivated species, 37; 

 American upland cotton, 38; Sea Island cotton^ 39; 

 Peruvian cotton, 40; Indian cotton, 41; Bengal cot- 

 ton, 42. 



CHAPTER V 



Cotton Varieties ..... 38-52 



What is a variety, 43; Origin of varieties, 44; Sta- 

 bility of varieties, 45; Influence of soil and climate, 

 46; Classification of varieties, 47; Cluster type, 48; 

 Semi-cluster type, 49; Rio Grande type, 50; Early 

 varieties of the King type, 51; The Big-boll type, 52; 

 The long-limbed type, 53; Intermediate varieties, 54; 

 Long-staple upland varieties, 55; High ranking vari- 

 eties, 56. 



CHAPTER VI 



Cotton Breeding . 53-66 



Reasons for breeding cotton, 57; Need of improve- 

 ment in cotton, 58; Start with the best variety, 59; 

 Qualities sought for in breeding cotton, 60; Qualities 

 associated with high yield, 61; Characters that deter- 

 mine quality, 62; Well defined ideal necessary, 63; 

 Methods of improving cotton, 64. The Improvement 

 of Cotton by Selection:' Selection of foundation stock, 

 65; Ginning cotton from select plants, 66; Testing 

 transmitting power of plants, 67; Selecting the best 

 progenies, 68; Making the second generation selec- 

 tions, 69; The multiphcation plot, 70; Influence of en- 

 vironment, 71. The Use of Hybridization in Cotton 

 Breeding: Reasons for hybridizing cotton, 72; The na- 

 ture of hybrids, 73; Fixation of cotton-hybrids, 74; 

 Methods of crossing cotton, 75; Hybridization versus 

 selection, 76; Acclimatization, 77. 



CHAPTER VII 



Cotton Soils and Climatic Adaptations . 67-80 



Cotton Soils: Soil types,- 78; Cotton soils of the 

 Coastal Plain Province, 79; Cotton soils of the 



