Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página 43
... granules equal in size to the average grain in a coarse sandy soil . The dotted circles represent single solid sandy soil grains , the solid black represents the films of water surrounding the soil grains and soil granules and filling ...
... granules equal in size to the average grain in a coarse sandy soil . The dotted circles represent single solid sandy soil grains , the solid black represents the films of water surrounding the soil grains and soil granules and filling ...
Página 44
... granules against loss by leaching . When a soil is well and strongly granu- lated each compound grain becomes like a tiny sponge , which may maintain itself full of water highly charged with plant food materials , to be sucked out by ...
... granules against loss by leaching . When a soil is well and strongly granu- lated each compound grain becomes like a tiny sponge , which may maintain itself full of water highly charged with plant food materials , to be sucked out by ...
Página 45
... granules out and at the same time removed a portion of the plant food which they had stored , then when a rain does come which causes the water to move downward , whether by capillarity or by percolation , these partly emptied granules ...
... granules out and at the same time removed a portion of the plant food which they had stored , then when a rain does come which causes the water to move downward , whether by capillarity or by percolation , these partly emptied granules ...
Página 46
... granules at the rate of 1,736 pounds of potash per acre of the surface foot , while the four poor soils , less strongly granulated and possessing less internal sur- face , were able to take from the solution at the rate of only 893 ...
... granules at the rate of 1,736 pounds of potash per acre of the surface foot , while the four poor soils , less strongly granulated and possessing less internal sur- face , were able to take from the solution at the rate of only 893 ...
Página 47
... granules , which are filled with and surrounded by moisture car- rying the plant food , they are under the very best conditions to obtain and utilize it . In order that there may be established a strong and deep granulation of the soil ...
... granules , which are filled with and surrounded by moisture car- rying the plant food , they are under the very best conditions to obtain and utilize it . In order that there may be established a strong and deep granulation of the soil ...
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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