Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página vii
... yields to soluble salts Surface washing Encouraging rise of soluble salts 142 145 146 CHAPTER VI WHY ARE LIME SOILS ... large soil surface may render plant food un- available Thorough granulation conserves plant food Porosity of soil ...
... yields to soluble salts Surface washing Encouraging rise of soluble salts 142 145 146 CHAPTER VI WHY ARE LIME SOILS ... large soil surface may render plant food un- available Thorough granulation conserves plant food Porosity of soil ...
Página viii
... large yields ---- Condition necessary for maximum duty of water 212 Prime physical condition of soil Abundance of plant food -- 212 215 218 219 Uniform distribution of water Amount of water applied at one time Loss of water by surface ...
... large yields ---- Condition necessary for maximum duty of water 212 Prime physical condition of soil Abundance of plant food -- 212 215 218 219 Uniform distribution of water Amount of water applied at one time Loss of water by surface ...
Página 7
... 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 ... large output of wheat she produces at the same time , of oats , of barley ... yields of cereals.
... 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 ... large output of wheat she produces at the same time , of oats , of barley ... yields of cereals.
Página 15
... large amounts of plant food materials , but not in available forms , and which it must become the business of soil management to trans- form into available condition with sufficient rapidity to meet the need of heavy yields . 3. 15 ...
... large amounts of plant food materials , but not in available forms , and which it must become the business of soil management to trans- form into available condition with sufficient rapidity to meet the need of heavy yields . 3. 15 ...
Página 16
... yields . 3. The necessity for an ample crumb- structure of the soil throughout the effective root zone , which bad ... large amounts of water may be stored to become charged with dissolved plant 16 SOIL MANAGEMENT.
... yields . 3. The necessity for an ample crumb- structure of the soil throughout the effective root zone , which bad ... large amounts of water may be stored to become charged with dissolved plant 16 SOIL MANAGEMENT.
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Términos y frases comunes
abundance amount of water available plant food become black marsh capacity of fields carried cent coarse sandy soil compound grains corn crumb structure cube cubic foot cultivation deep depth develop diameter dissolved drainage dry soil earth mulch effective essential plant food evaporation face feeding fertilizers finest clay soils furrows granules green manures growing growth humus important increase internal surface irrigation large yields leaching less lime carbonate loam loss of water magnesia maintained nitrate nitric acid nitrification nitrogen organic matter phosphoric acid physical condition plant food elements plant food materials plant sap poor soils potash pounds of water pounds per acre practice productive capacity rain rainfall root hairs root zone roots of crops salts saturated soil grains soil management soil moisture soil particles soil surface soluble plant food solution square square miles stable manure surface four feet surface soil tion underdrainage water films water-soluble plant food wheat