78 CULTIVATION METHODS AND ROTATIONS FOE GREAT PLAINS. 



Page. 



Wheat, average price per bushel in various States, 1900-1909 25-26 



comparison of disked corn stubble with summer tillage as preparation for 



crop 45-48 



average value per 

 acre 45-48 



continuous cropping, average yield and value per acre, 1900-1909 27-28 



comparison with alternate cropping and summer 



tillage, experiments 14-20 



crop-rotation tests, average yield and value per acre, 1906-1909 28-34 



rotations, comparison with continuous cropping, value per acre. 36, 40-45 



yield per acre. 35, 40-45 



cultivation, study of methods 59 



oats, and corn a better sequence on spring plowing than oats, wheat, and 



corn 52-54 



relation to summer tillage in three-year rotation 51-52 



spring, comparison of disking with plowing corn stubble for crop 49 



spring, crop rotations, comparisons 20-40 



cropping systems, comparison of yields per acre 16, 18 



tillage methods, average production per acre 8-12, 67-72 



various cropping methods, average yield and value per acre, 1900-1909. . 26-27 

 187 



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