The Book of Wheat: An Economic History and Practical Manual of the Wheat IndustryOrange Judd Company, 1919 - 369 páginas |
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Página 107
... . This reduction in cost of production represented a saving of about $ 91,000,000 for the United States on the wheat crop of 1907 . CHAPTER VII . CROP ROTATION AND IRRIGATION CROP ROTATION . YIELD AND COST OF PRODUCTION 107.
... . This reduction in cost of production represented a saving of about $ 91,000,000 for the United States on the wheat crop of 1907 . CHAPTER VII . CROP ROTATION AND IRRIGATION CROP ROTATION . YIELD AND COST OF PRODUCTION 107.
Página 108
... ROTATION AND IRRIGATION CROP ROTATION . The Effects of Continuous Cropping . - Different crops re- inove from and contribute to the soil elements of different kinds or in different proportions . The availability of plant food is also ...
... ROTATION AND IRRIGATION CROP ROTATION . The Effects of Continuous Cropping . - Different crops re- inove from and contribute to the soil elements of different kinds or in different proportions . The availability of plant food is also ...
Página 109
... culture or its abandonment . While there may be extenuating circumstances in pioneer times which will 18th U. S. Census , Agriculture , p . viii , excuse extensive methods of farming when the future must be CROP ROTATION AND IRRIGATION 109.
... culture or its abandonment . While there may be extenuating circumstances in pioneer times which will 18th U. S. Census , Agriculture , p . viii , excuse extensive methods of farming when the future must be CROP ROTATION AND IRRIGATION 109.
Página 110
... rotation of crops that saved the wasted year during which land used to lie fallow . In the middle of the nineteenth century , rotations were practiced which brought a wheat crop every fourth or fifth year , or twice in 6 years . The ...
... rotation of crops that saved the wasted year during which land used to lie fallow . In the middle of the nineteenth century , rotations were practiced which brought a wheat crop every fourth or fifth year , or twice in 6 years . The ...
Página 111
... rotation was practiced in the United States even as recently as 1902. At the close of the eighteenth century the deterioration of the soil became apparent , particularly in Virginia and ... ROTATION IS CROP ROTATION AND IRRIGATION 111.
... rotation was practiced in the United States even as recently as 1902. At the close of the eighteenth century the deterioration of the soil became apparent , particularly in Virginia and ... ROTATION IS CROP ROTATION AND IRRIGATION 111.
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