First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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... HENGIST HORNE . 66 When tillage begins , other arts follow . The farmers , therefore , are the founders of human civilization . " DANIEL WEBSTER . ACKNOWLEDGMENTS The author desires to acknowledge his obligation to the.
... HENGIST HORNE . 66 When tillage begins , other arts follow . The farmers , therefore , are the founders of human civilization . " DANIEL WEBSTER . ACKNOWLEDGMENTS The author desires to acknowledge his obligation to the.
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... Tillage VII . Drainage and Irrigation PAGE 3 12 • 21 31 47 63 75 VIII . Summer Fallowing 85 IX . Humus and Green - manuring 94 X. Rotation of Crops · 105 XI . Factors Affecting Value of Fresh Manure 113 XII . Amount and Value of Manure ...
... Tillage VII . Drainage and Irrigation PAGE 3 12 • 21 31 47 63 75 VIII . Summer Fallowing 85 IX . Humus and Green - manuring 94 X. Rotation of Crops · 105 XI . Factors Affecting Value of Fresh Manure 113 XII . Amount and Value of Manure ...
Página 58
... Nature undisturbed returns all the plant food removed from the soil , by the decay of the plants which it has produced An incompleted soil . Good tillage will hasten the decomposition. 58 FIRST PRINCIPLES OF SOIL FERTILITY.
... Nature undisturbed returns all the plant food removed from the soil , by the decay of the plants which it has produced An incompleted soil . Good tillage will hasten the decomposition. 58 FIRST PRINCIPLES OF SOIL FERTILITY.
Página 62
... early spring plowing on the conservation of moisture . The darker plots were plowed earlier than the lighter ones and contained several tons more water per acre CHAPTER VI TILLAGE Tillage Increases Feeding Ground for Roots.- The.
... early spring plowing on the conservation of moisture . The darker plots were plowed earlier than the lighter ones and contained several tons more water per acre CHAPTER VI TILLAGE Tillage Increases Feeding Ground for Roots.- The.
Página 63
Alfred Vivian. CHAPTER VI TILLAGE Tillage Increases Feeding Ground for Roots.- The most efficient means of assisting nature in the con- version of unavailable food into forms that the plant Plowing is the most important tillage operation ...
Alfred Vivian. CHAPTER VI TILLAGE Tillage Increases Feeding Ground for Roots.- The most efficient means of assisting nature in the con- version of unavailable food into forms that the plant Plowing is the most important tillage operation ...
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Términos y frases comunes
acid and potash acre agricultural ammonia amount of nitrogen amount of plant animals applied average bacteria barn barnyard manure bedding carbonic acid clay clover commercial fertilizers complete fertilizers composition compounds condition corn crop decay deep stall denitrification drainage dry matter elements of plant Experiment Station fact farm farmer feeding fertilizing constituents fertilizing materials fertilizing value field grain green manuring ground grown hot fermentation humus important inches increase ingredients kainite land leaching legumes leguminous lime liquid excrement loss of nitrogen lysimeters manure produced materials ments method mineral matter mixed moisture necessary nitrate of soda nitrification nitrifying bacteria nitro nitrogen nure obtained organic matter oxygen phoric acid phos phosphate phosphoric acid plant food plant growth plots plowed pounds practically present rains ration removed rock roots rotation shown soil soil contains soluble substances sufficient sulphate superphosphate supply surface tillage tion urine wheat yield