Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página 104
... pounds of water must be taken from the soil and most of it passed through the crop for each pound of dry substance produced above ground . With good soil conditions and an abundance of plant food it was possible to secure yields from ...
... pounds of water must be taken from the soil and most of it passed through the crop for each pound of dry substance produced above ground . With good soil conditions and an abundance of plant food it was possible to secure yields from ...
Página 107
... pound of dry product ; on the same soils , after they had become impoverished by repeated cropping without fertilization , the same crops used an average of 625 pounds of water for each pound of dry produce . It is also true that a ...
... pound of dry product ; on the same soils , after they had become impoverished by repeated cropping without fertilization , the same crops used an average of 625 pounds of water for each pound of dry produce . It is also true that a ...
Página 108
... pounds per acre , instead of 11,000 ; the oats produced 18,000 pounds in- stead of 8,000 ; and the potatoes produced 12,000 pounds instead of 7,000 . But the amount of water used per pound of dry sub- stance produced was very nearly the ...
... pounds per acre , instead of 11,000 ; the oats produced 18,000 pounds in- stead of 8,000 ; and the potatoes produced 12,000 pounds instead of 7,000 . But the amount of water used per pound of dry sub- stance produced was very nearly the ...
Página 112
... pounds of water per pound of dry substance , or at the rate of four inches of rainfall per ton . We receive at Madison , Wisconsin , be- tween May 1 and October 1 , an average of nearly 18 inches , so that during about one- half the ...
... pounds of water per pound of dry substance , or at the rate of four inches of rainfall per ton . We receive at Madison , Wisconsin , be- tween May 1 and October 1 , an average of nearly 18 inches , so that during about one- half the ...
Página 209
... pound of dry substance , including the neces- sary loss of water by evaporation from the soil , but excluding all loss by drainage . The results were obtained by growing plants in large cylinders , 52 inches deep and 18 inches in ...
... pound of dry substance , including the neces- sary loss of water by evaporation from the soil , but excluding all loss by drainage . The results were obtained by growing plants in large cylinders , 52 inches deep and 18 inches in ...
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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