Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página ix
... peats Shrinkage of peat soil 270 271 272 274 Not suited to legumes 277 CHAPTER XII AGRICULTURE OF THREE ANCIENT NATIONS 278-303 Necessity for maintenance of soil fertility in China , Korea and Japan More than one crop in a season ...
... peats Shrinkage of peat soil 270 271 272 274 Not suited to legumes 277 CHAPTER XII AGRICULTURE OF THREE ANCIENT NATIONS 278-303 Necessity for maintenance of soil fertility in China , Korea and Japan More than one crop in a season ...
Página 63
... peat swamps where the water content is exces- sively high . To understand these facts it must be remembered that there is a certain thickness of water film which is held so firmly to the soil grain surfaces as to be wholly unavailable ...
... peat swamps where the water content is exces- sively high . To understand these facts it must be remembered that there is a certain thickness of water film which is held so firmly to the soil grain surfaces as to be wholly unavailable ...
Página 93
... peat soils and certain clay types , especially when the subsoil near the surface is extremely fine in texture , when on surrounding soils of different texture , and with smaller absolute water content , good growing conditions exist 93 ...
... peat soils and certain clay types , especially when the subsoil near the surface is extremely fine in texture , when on surrounding soils of different texture , and with smaller absolute water content , good growing conditions exist 93 ...
Página 94
... peat soils the extent of solid surface for fixing water is extremely large , and hence we often see desert types of vegetation grow- ing in such places . It is my judgment , too , that any soil containing a high content of colloidal ...
... peat soils the extent of solid surface for fixing water is extremely large , and hence we often see desert types of vegetation grow- ing in such places . It is my judgment , too , that any soil containing a high content of colloidal ...
Página 182
... peat soils which causes plants to suffer from lack of water when there are enormous quantities present . INFLUENCE OF HUMUS ON WATER CONTENT OF SOILS Much is said regarding the influence of humus in increasing the water content of soils ...
... peat soils which causes plants to suffer from lack of water when there are enormous quantities present . INFLUENCE OF HUMUS ON WATER CONTENT OF SOILS Much is said regarding the influence of humus in increasing the water content of soils ...
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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