Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página viii
... growing a feeding problem Needs for soil ventilation Processes of soil ventilation Conditions for strong granulation of soil Thorough drainage Dissolved limestone Effect of too much soil water Large passageways Strong drying may improve ...
... growing a feeding problem Needs for soil ventilation Processes of soil ventilation Conditions for strong granulation of soil Thorough drainage Dissolved limestone Effect of too much soil water Large passageways Strong drying may improve ...
Página 1
... grow more and more important as populations multiply . With the increasing cost and ulti- mate exhaustion of mineral fuels ; with our timber vanishing rapidly before the ever- growing demands for lumber and paper ; with the inevitably ...
... grow more and more important as populations multiply . With the increasing cost and ulti- mate exhaustion of mineral fuels ; with our timber vanishing rapidly before the ever- growing demands for lumber and paper ; with the inevitably ...
Página 2
... grown upon the farm the materials from which to manufacture , not only paper and substitutes for lumber , but fuels as well . Not the complete utiliza- tion of the power of every stream which reaches the sea , reinforced by the force of ...
... grown upon the farm the materials from which to manufacture , not only paper and substitutes for lumber , but fuels as well . Not the complete utiliza- tion of the power of every stream which reaches the sea , reinforced by the force of ...
Página 7
... same time , of oats , of barley and of rye nearly fourfold the crop grown in North America ; the figures stand- ing 4,362 million bushels for Europe against 1,099 millions for 7 INFLUENCE OF SOIL MANAGEMENT Average yields of cereals.
... same time , of oats , of barley and of rye nearly fourfold the crop grown in North America ; the figures stand- ing 4,362 million bushels for Europe against 1,099 millions for 7 INFLUENCE OF SOIL MANAGEMENT Average yields of cereals.
Página 8
... grown in North Amer- ica with our great staple , maize , the total output aggregates but 3,965 millions of bushels , as compared with 6,413 millions harvested each year in Europe . And when we recall that the producing power of the same ...
... grown in North Amer- ica with our great staple , maize , the total output aggregates but 3,965 millions of bushels , as compared with 6,413 millions harvested each year in Europe . And when we recall that the producing power of the same ...
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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