Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Resultados 1-5 de 52
Página vii
... Depth of soil Proportional parts Water retained 162 162 164 Air in soils Plant food content Soluble plant food 165 166 169 Soil particles in relation to food solution 171 Concentrated films not readily removed 172 Threefold role of soil ...
... Depth of soil Proportional parts Water retained 162 162 164 Air in soils Plant food content Soluble plant food 165 166 169 Soil particles in relation to food solution 171 Concentrated films not readily removed 172 Threefold role of soil ...
Página ix
... depth of saturation of soil Two ways of securing more even distribution Use of level furrows Crop mulch method Page 238 -- 244 245 246 252 ------ 254 254 258 CHAPTER XI RECLAMATION OF SWAMP LANDS-- -264-277 Problems of underdrainage 264 ...
... depth of saturation of soil Two ways of securing more even distribution Use of level furrows Crop mulch method Page 238 -- 244 245 246 252 ------ 254 254 258 CHAPTER XI RECLAMATION OF SWAMP LANDS-- -264-277 Problems of underdrainage 264 ...
Página 20
... depth on the level over the surface , and if the space occupied by air were also filled with water the com- bined amount would overspread the surface to a depth of 6.69 inches . There are few places in the United States . where the ...
... depth on the level over the surface , and if the space occupied by air were also filled with water the com- bined amount would overspread the surface to a depth of 6.69 inches . There are few places in the United States . where the ...
Página 23
... depth , and hence the roots of a crop may be spread out through a soil mass carrying three or four times the amounts of all of the plant food elements designated in the table above , excepting only nitrogen , and in this case Warington ...
... depth , and hence the roots of a crop may be spread out through a soil mass carrying three or four times the amounts of all of the plant food elements designated in the table above , excepting only nitrogen , and in this case Warington ...
Página 26
... depth of some 16 to 18 inches . This cube of plant food soluble in water , de- rived from one cubic foot of surface soil , a little less than 0.1 of an inch on an edge , constitutes .1148 per cent of the dry soil , thus making a weight ...
... depth of some 16 to 18 inches . This cube of plant food soluble in water , de- rived from one cubic foot of surface soil , a little less than 0.1 of an inch on an edge , constitutes .1148 per cent of the dry soil , thus making a weight ...
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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