Soil ManagementOrange Judd Company, 1914 - 311 páginas |
Otras ediciones - Ver todas
Términos y frases comunes
amount of water applied available plant food average become black marsh bushels capillary action carried cent clay loam compound grains corn cubic foot cultivation deep depth develop diameter drainage drained earth mulch effective essential plant food evaporation feeding fertilizer finest clay soils foot of soil furrows granules growing growth humus important inches of water irrigation Japan large yields layer leaching less lime carbonate loam loss of water maintained nearly nitrate nitric acid nitrification nitrogen organic matter peat phosphoric acid physical condition plant food elements plant food materials plant sap potash pounds of water pounds per acre practice productive capacity rain rainfall rice root hairs root zone saturated sodium nitrate soil grains soil management soil moisture soil particles soil surface soluble plant food solution stable manure subsoil surface four feet surface soil surface tension texture tion tons per acre underdrainage washing water films wheat
Pasajes populares
Página 1 - with our timber vanishing rapidly before the evergrowing demands for lumber and paper; with the inevitably slow growth of trees and the very limited areas which the world can ever afford to devote to forestry, the time must surely come when, in
Página 2 - hence only in the event of science and engineering skill becoming able to devise means for transforming the unlimited energy of space through which we are ever whirled, with an economy approximating that which
Página 292 - which is allowed to grow until near the next transplanting time, when it is either turned under directly, or more often
Página 2 - of every stream which reaches the sea, reinforced by the force of the winds and the energy of the waves which may be transformed along
Página 292 - stacked along the canals and saturated while doing so with soft mud dipped from the bottom of the canal. After fermenting
Página 2 - crops now exhibit, can good soil management be relieved of the task of meeting a portion of the world's demand for power and heat.
Página 292 - Just before or immediately after the rice crop is harvested fields are often sowed to "clover