Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página v
... soil management-- Average yields of cereals Importance of soil management Study of source of soil nitrogen Necessary conditions for fertile soil Relative volumes in foot of surface soil Amount of plant food carried by soils Amount of ...
... soil management-- Average yields of cereals Importance of soil management Study of source of soil nitrogen Necessary conditions for fertile soil Relative volumes in foot of surface soil Amount of plant food carried by soils Amount of ...
Página vii
... soil particles 173 Effective diameter of soil grains Effective diameter determines rate of flow of air and water 174 175 -- Effective diameter determines internal soil surface 177 Increased soil surface makes more water unavailable 179 ...
... soil particles 173 Effective diameter of soil grains Effective diameter determines rate of flow of air and water 174 175 -- Effective diameter determines internal soil surface 177 Increased soil surface makes more water unavailable 179 ...
Página 17
... to 7 inches deep in the spring of the same season . The second cube represents the volume the dry soil would WATER - SOLUBLE PLANT FOOD TOTAL PLANT FOOD PER CENT '17 INFLUENCE OF SOIL MANAGEMENT Relative volumes in foot of surface soil.
... to 7 inches deep in the spring of the same season . The second cube represents the volume the dry soil would WATER - SOLUBLE PLANT FOOD TOTAL PLANT FOOD PER CENT '17 INFLUENCE OF SOIL MANAGEMENT Relative volumes in foot of surface soil.
Página 18
... SOIL MOISTURE VOLUME OF SOIL AIR 44.24 73.18 764.1 VOLUME OF DRY SOIL 100.0 86.99 1728 ONE CUBIC FOOT OF SURFACE SOIL Fig . 2 Showing the relative amounts of dry soil , soil air , total plant food and plant food materials soluble in ...
... SOIL MOISTURE VOLUME OF SOIL AIR 44.24 73.18 764.1 VOLUME OF DRY SOIL 100.0 86.99 1728 ONE CUBIC FOOT OF SURFACE SOIL Fig . 2 Showing the relative amounts of dry soil , soil air , total plant food and plant food materials soluble in ...
Página 19
... soil is 73.176 pounds , while the dimension gives a cube a little more than 9 inches on each edge . The third cube on the chart represents the vol- ume of the space in the foot of surface soil which is occupied by air when the amount of ...
... soil is 73.176 pounds , while the dimension gives a cube a little more than 9 inches on each edge . The third cube on the chart represents the vol- ume of the space in the foot of surface soil which is occupied by air when the amount of ...
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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