Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página v
... carried by soils Amount of water soluble plant food in soils Source of soluble plant food Internal surface in soils 21 24 Need for over - supply of soluble plant food in soils 29 Methods of improving soil structure Good tilth 33 34 40 ...
... carried by soils Amount of water soluble plant food in soils Source of soluble plant food Internal surface in soils 21 24 Need for over - supply of soluble plant food in soils 29 Methods of improving soil structure Good tilth 33 34 40 ...
Página 8
... spiritual uplifting for the millions who are carrying the manual burdens of the world , and for the young men and women of these classes , impelled by their inherent aptitude for more intellectual labors , 8 SOIL MANAGEMENT.
... spiritual uplifting for the millions who are carrying the manual burdens of the world , and for the young men and women of these classes , impelled by their inherent aptitude for more intellectual labors , 8 SOIL MANAGEMENT.
Página 10
... carried to and maintained at the highest productive capacity before , either singly or in combination , the other lines of effort can yield their highest returns . If a hardy strain of wheat , for example , will in- crease the yield on ...
... carried to and maintained at the highest productive capacity before , either singly or in combination , the other lines of effort can yield their highest returns . If a hardy strain of wheat , for example , will in- crease the yield on ...
Página 13
... carried to the sea and even escaping in large quantities into the atmosphere in the form of free nitrogen . When , finally , the matter came under rigid investigation by men of science , there fol- lowed a battle extending over years ...
... carried to the sea and even escaping in large quantities into the atmosphere in the form of free nitrogen . When , finally , the matter came under rigid investigation by men of science , there fol- lowed a battle extending over years ...
Página 16
... carrying a rich 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 ...
... carrying a rich 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 ...
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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