Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página vii
... nitric acid Page 134 136 139 Capillary movement of sulphates and phosphates-- 140 Relation of yields to soluble salts Surface washing Encouraging rise of soluble salts 142 145 146 CHAPTER VI WHY ARE LIME SOILS STRONG ?. Source of lime ...
... nitric acid Page 134 136 139 Capillary movement of sulphates and phosphates-- 140 Relation of yields to soluble salts Surface washing Encouraging rise of soluble salts 142 145 146 CHAPTER VI WHY ARE LIME SOILS STRONG ?. Source of lime ...
Página 71
... nitric acid formed during the processes of nitrification , thus keeping the soil from becoming sour and allowing the nitrates to be produced in much greater amounts , keeping up the nitrogen supply for the crop on the ground . But this ...
... nitric acid formed during the processes of nitrification , thus keeping the soil from becoming sour and allowing the nitrates to be produced in much greater amounts , keeping up the nitrogen supply for the crop on the ground . But this ...
Página 121
... nitric acid , and the carbonate is the " black alkali " of the west , which everywhere has the tend- ency to dissolve humus and puddle the soil . In this impaired condition a higher per cent of the soil moisture becomes unavailable to ...
... nitric acid , and the carbonate is the " black alkali " of the west , which everywhere has the tend- ency to dissolve humus and puddle the soil . In this impaired condition a higher per cent of the soil moisture becomes unavailable to ...
Página 136
... nitric acid which chance to be present in the soil through which it is passing ; and if these pass the roots without being removed by them and reach the surface , the soil is as effectually robbed of its essential plant food materials ...
... nitric acid which chance to be present in the soil through which it is passing ; and if these pass the roots without being removed by them and reach the surface , the soil is as effectually robbed of its essential plant food materials ...
Página 137
... nitric acid found at different depths in the soil after seventy days of contin- uous capillary movement where the soil surface was firm . The dotted bands represent the same conditions where the surface was under a three - inch loose ...
... nitric acid found at different depths in the soil after seventy days of contin- uous capillary movement where the soil surface was firm . The dotted bands represent the same conditions where the surface was under a three - inch loose ...
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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