First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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... Green - manuring 94 X. Rotation of Crops · 105 XI . Factors Affecting Value of Fresh Manure 113 XII . Amount and Value of Manure produced on Farm 127 XIII . Losses in Manure 137 XIV . Preservation of Manure 150 XV . Applying Manure 165 ...
... Green - manuring 94 X. Rotation of Crops · 105 XI . Factors Affecting Value of Fresh Manure 113 XII . Amount and Value of Manure produced on Farm 127 XIII . Losses in Manure 137 XIV . Preservation of Manure 150 XV . Applying Manure 165 ...
Página 9
... green corn is allowed to wilt in the sun it loses a large percentage of its weight by the evapora- tion of the water which it contains . If the remainder is now heated in an oven at 212 ° F. it again decreases in weight , but finally ...
... green corn is allowed to wilt in the sun it loses a large percentage of its weight by the evapora- tion of the water which it contains . If the remainder is now heated in an oven at 212 ° F. it again decreases in weight , but finally ...
Página 17
... green coloring matter ( chlorophyll ) , so that it is only those plants having green leaves that can use the carbonic acid . Such plants as mushrooms and other fungi , for instance , can not obtain their carbon in this manner but must ...
... green coloring matter ( chlorophyll ) , so that it is only those plants having green leaves that can use the carbonic acid . Such plants as mushrooms and other fungi , for instance , can not obtain their carbon in this manner but must ...
Página 18
... thoroughly demonstrated that the green plants derive their carbon solely from the carbonic acid of the atmosphere , and are not dependent in any way upon the carbonaceous matter in the soil . In fact 18 FIRST PRINCIPLES OF SOIL FERTILITY.
... thoroughly demonstrated that the green plants derive their carbon solely from the carbonic acid of the atmosphere , and are not dependent in any way upon the carbonaceous matter in the soil . In fact 18 FIRST PRINCIPLES OF SOIL FERTILITY.
Página 21
... green plant . In spite of the small quantity of nitrogen in the crop it is the most important of all plant foods from the practical point of view . In fact the solution of the problem of the maintenance of fertility depends upon an ...
... green plant . In spite of the small quantity of nitrogen in the crop it is the most important of all plant foods from the practical point of view . In fact the solution of the problem of the maintenance of fertility depends upon an ...
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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