Soil ManagementOrange Judd Company, 1914 - 311 páginas |
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Página i
... Drainage , " " Physics of Agricul- ture , " " Ventilation for Dwellings , Rural Schools and Stables " and " Farmers of Forty Centuries . " Professor of Agri- cultural Physics in the University of Wisconsin , 1888-1901 ; Chief of ...
... Drainage , " " Physics of Agricul- ture , " " Ventilation for Dwellings , Rural Schools and Stables " and " Farmers of Forty Centuries . " Professor of Agri- cultural Physics in the University of Wisconsin , 1888-1901 ; Chief of ...
Página v
... Drainage influencing soil structure 46 48 CHAPTER II PRINCIPLES GOVERNING THE PRODUCTIVE CAPACITY OF Fields_ . 50-77 Nature of soil 50 Importance of soil surface 52 Importance of rapid drainage 58 Soil structure 59 Unavailable water 63 ...
... Drainage influencing soil structure 46 48 CHAPTER II PRINCIPLES GOVERNING THE PRODUCTIVE CAPACITY OF Fields_ . 50-77 Nature of soil 50 Importance of soil surface 52 Importance of rapid drainage 58 Soil structure 59 Unavailable water 63 ...
Página viii
... drainage Dissolved limestone Effect of too much soil water Large passageways Strong drying may improve texture Use of crops with dense root systems Excessive drying may destroy texture Effect of sodium nitrate on texture_ . CHAPTER IX ...
... drainage Dissolved limestone Effect of too much soil water Large passageways Strong drying may improve texture Use of crops with dense root systems Excessive drying may destroy texture Effect of sodium nitrate on texture_ . CHAPTER IX ...
Página 46
... kinds of stable manure , and then , after an interval of six months , they were all leached in the same manner and with the same amounts of pure water , to see how much 46 SOIL MANAGEMENT Drainage influencing soil structure.
... kinds of stable manure , and then , after an interval of six months , they were all leached in the same manner and with the same amounts of pure water , to see how much 46 SOIL MANAGEMENT Drainage influencing soil structure.
Página 47
... deep granulation of the soil , the first essential condition is ample under- ' drainage , and it is most fortunate that , in the great majority of fields , natural conditions abundantly secure this 47 INFLUENCE OF SOIL MANAGEMENT.
... deep granulation of the soil , the first essential condition is ample under- ' drainage , and it is most fortunate that , in the great majority of fields , natural conditions abundantly secure this 47 INFLUENCE OF SOIL MANAGEMENT.
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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