Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página v
... Unavailable water 63 Development and maintenance of soil structure_ . Surface washing and action of lime Comparison of coarse and fine - grained soils 67 71 74 Page CHAPTER III FUNCTIONS , AVAILABILITY AND CONSERVA- TION OF V.
... Unavailable water 63 Development and maintenance of soil structure_ . Surface washing and action of lime Comparison of coarse and fine - grained soils 67 71 74 Page CHAPTER III FUNCTIONS , AVAILABILITY AND CONSERVA- TION OF V.
Página vi
... TION OF SOIL MOISTURE IN CROP PRO- DUCTION Water often the limiting factor of yield_ Amount of water required per crop ---- " Dry farming " limitations Importance of soil texture Water unavailable to crops Soil texture in relation to ...
... TION OF SOIL MOISTURE IN CROP PRO- DUCTION Water often the limiting factor of yield_ Amount of water required per crop ---- " Dry farming " limitations Importance of soil texture Water unavailable to crops Soil texture in relation to ...
Página 2
... tion of the power of every stream which reaches the sea , reinforced by the force of the winds and the energy of the waves which may be transformed along coast lines , can meet the demands of the future for power and heat ; and hence ...
... tion of the power of every stream which reaches the sea , reinforced by the force of the winds and the energy of the waves which may be transformed along coast lines , can meet the demands of the future for power and heat ; and hence ...
Página 4
... tion has been natural , rational and , up to the present time , perhaps , most advantageous ; but we are fast approaching that stage when it will become of the greatest importance- not that less attention shall be given to ad- vancing 4 ...
... tion has been natural , rational and , up to the present time , perhaps , most advantageous ; but we are fast approaching that stage when it will become of the greatest importance- not that less attention shall be given to ad- vancing 4 ...
Página 7
... tion the mean yield per acre of wheat in Germany , where more attention has been de- voted to the maintenance of soil fertility , was 26 bushels per acre , and in the United Kingdom it exceeded 31 bushels . Not- withstanding the fact ...
... tion the mean yield per acre of wheat in Germany , where more attention has been de- voted to the maintenance of soil fertility , was 26 bushels per acre , and in the United Kingdom it exceeded 31 bushels . Not- withstanding the fact ...
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Términos y frases comunes
abundance agricultural amount of water available plant food become black marsh capillary action capillary rise carried cent compound grains corn cube cubic foot cultivation depth develop diameter drainage drained dry soil earth mulch effective essential plant food evaporation face feeding fertilizer finest clay soils furrows granules green manures ground growing growth humus important inches of water irrigation Japan large yields layer leaching less lime carbonate loam loss of water maintained nitrate nitric acid nitrification nitrogen organic matter peat phosphoric acid physical condition plant food elements plant food materials plant sap poor soils potash pound of dry pounds of water pounds per acre practice productive capacity rain rainfall rice root hairs root zone salts saturated sodium nitrate soil grains soil management soil moisture soil surface soluble plant food solution square miles stable manure subsoil surface four feet surface soil texture tion ture underdrainage water films wheat