Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página 1
... our timber vanishing rapidly before the ever- growing demands for lumber and paper ; with the inevitably slow growth of trees and the very PRODUCTIVE CAPACITY OF FIELDS AS INFLU- ENCED BY SOIL MANAGEMENT_ Needs for increased production I- ...
... our timber vanishing rapidly before the ever- growing demands for lumber and paper ; with the inevitably slow growth of trees and the very PRODUCTIVE CAPACITY OF FIELDS AS INFLU- ENCED BY SOIL MANAGEMENT_ Needs for increased production I- ...
Página 2
Franklin Hiram King Carrie H. Baker King. with the inevitably slow growth of trees and the very limited areas which the world can ever afford to devote to forestry , the time must surely come when , in short - period ro- tations , there ...
Franklin Hiram King Carrie H. Baker King. with the inevitably slow growth of trees and the very limited areas which the world can ever afford to devote to forestry , the time must surely come when , in short - period ro- tations , there ...
Página 16
... growth of soluble plant food materials , they find themselves in an ample pasture of nutritious feed , and growth is rapid . But the first great requisite of this pasture is room- broad surfaces upon which large amounts of water may be ...
... growth of soluble plant food materials , they find themselves in an ample pasture of nutritious feed , and growth is rapid . But the first great requisite of this pasture is room- broad surfaces upon which large amounts of water may be ...
Página 29
... growth ; and just as a rich blood can only be maintained out of a rich solution in the alimentary canal , ever reinforced by good air , so a 29 INFLUENCE OF SOIL MANAGEMENT . Need for over-supply of soluble plant food in soils.
... growth ; and just as a rich blood can only be maintained out of a rich solution in the alimentary canal , ever reinforced by good air , so a 29 INFLUENCE OF SOIL MANAGEMENT . Need for over-supply of soluble plant food in soils.
Página 31
... growth , there was a yield on the stronger soil nearly 2.5 times that which developed on the poorer soil . We have reason to think that , in the ulti- mate analysis , an exhausted soil is one in which it has become impossible for ...
... growth , there was a yield on the stronger soil nearly 2.5 times that which developed on the poorer soil . We have reason to think that , in the ulti- mate analysis , an exhausted soil is one in which it has become impossible for ...
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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