76 CULTIVATION METHODS AND ROTATIONS FOR GREAT PLAINS. 



Page. 



Crops, rotation, basis of comparison for crops grown 24-40 



comparison of fall and spring plowing 50-51 



sequences 52-54 



systems with tillage methods, studies and experi- 

 ments 8-12,67-72 



with continuous cropping .-. 20-40 



yield and value per acre 



of various grains 34-45 



dry-land agriculture, importance 10 



experiments, conclusions 67-72 



explanatory notes 23-24 



factors involved 65-67 



Great Plains area, necessity and value 10 



planning, rules 67 



principles . 65-67 



system, difficulties of establishment 9-10 



tests of various grains, average yield and value per acre, 1906- 



1909 28-34 



value in conservation of organic matter in soil 55-65 



sequences, comparison 52-54 



Cultivation, corn. See Corn, cultivation. 



methods, and crop rotations, Great Plains area, purpose of investi- 

 gations 7-8 



results of investi- 

 gations 8-12 



sufficiency of the 

 data submitted . 12-13 



wheat. See Wheat, cultivation. 



Disking, corn stubble, comparison with plowing, for spring wheat 49 



Dry-land agriculture. See Agriculture, dry-land. 



Farming, one-crop, various systems, test of merits 14-20 



Fodder, corn. See Corn, fodder. 



Grain. See Barley, Corn, Oats, and Wheat. 



Great Plains area, continuous cropping, comparison with alternate cropping and 



summer tillage 14-20 



cultivation methods and crop rotations, purpose of investi- 

 gations 7-8 



results of investiga- 

 tions 8-12 



sufficiency of the 

 data submitted . . 12-13 



precipitation, 1904-1909, by months 72-74 



Hay, cost and value 47 



Introduction to bulletin 7 



Kansas, cropping methods, various grains, average yield and value per acre, 



1900-1909 26-27 



various grains, average price per bushel, 1900-1909 25-26 



Matter, organic, in the soil, conservation, rotations 55-65 



Moisture, conservation, arid regions, conditions, value, etc 19-20 



Nebraska, cropping methods, various grains, average yield and value per acre, 



1900-1909 26-27 



various grains, average price per bushel, 1900-1909 25-26 



187 



