Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página 16
... potash , lime , mag- nesia and phosphoric acid , so that when the roots of crops spread themselves out over the extensive internal surface , carrying a rich growth of soluble plant food materials , they find themselves in an ample ...
... potash , lime , mag- nesia and phosphoric acid , so that when the roots of crops spread themselves out over the extensive internal surface , carrying a rich growth of soluble plant food materials , they find themselves in an ample ...
Página 22
... Potash Lime Magnesia Nitrogen Phosphoric Sulphuric acid acid tons tons 20 8.9 tons 7.0 tons tons tons 4.0 2.4 .6 These amounts constitute 2.68 per cent of the dry weight of the soil , and their aggre- gate volume is represented ...
... Potash Lime Magnesia Nitrogen Phosphoric Sulphuric acid acid tons tons 20 8.9 tons 7.0 tons tons tons 4.0 2.4 .6 These amounts constitute 2.68 per cent of the dry weight of the soil , and their aggre- gate volume is represented ...
Página 23
... potash , lime or magnesia as are car- ried in the surface four feet of soil . There is phosphoric acid enough for 1,100 such crops , sulphuric acid enough for 700 , but nitrogen enough for only 155 such crops of wheat . Nevertheless it ...
... potash , lime or magnesia as are car- ried in the surface four feet of soil . There is phosphoric acid enough for 1,100 such crops , sulphuric acid enough for 700 , but nitrogen enough for only 155 such crops of wheat . Nevertheless it ...
Página 26
... Potash K Good soil , 663.5 2,292.0 Lime Ca Magnesia Nitrogen Phosphoric Sulphuric Poor soil , 586.9 Mg 766.6 626.8 293.4 35.70 N acid , P. acid , S 71.61 202.6 1,116.0 84.83 548.1 Number of crops of wheat required to remove the above ...
... Potash K Good soil , 663.5 2,292.0 Lime Ca Magnesia Nitrogen Phosphoric Sulphuric Poor soil , 586.9 Mg 766.6 626.8 293.4 35.70 N acid , P. acid , S 71.61 202.6 1,116.0 84.83 548.1 Number of crops of wheat required to remove the above ...
Página 28
... Potash K Ca Mg . N acid , P acid , S 348.3 82.0 113.6 1,379.0 64.3 388.6 Good soils , 264.8 1,016.4 Poor soils , 182.4 395.4 177.4 30.2 Number of crops of wheat required to remove the Good soils , 9.I Poor soils , 6.2 above amounts ...
... Potash K Ca Mg . N acid , P acid , S 348.3 82.0 113.6 1,379.0 64.3 388.6 Good soils , 264.8 1,016.4 Poor soils , 182.4 395.4 177.4 30.2 Number of crops of wheat required to remove the Good soils , 9.I Poor soils , 6.2 above amounts ...
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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