First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 4
... the subject thoroughly practical , and for this reason the minimum of theory and the maximum of demonstrated facts will be given , and with the least possible use of technical language . Be-. + FIRST PRINCIPLES OF SOIL FERTILITY.
... the subject thoroughly practical , and for this reason the minimum of theory and the maximum of demonstrated facts will be given , and with the least possible use of technical language . Be-. + FIRST PRINCIPLES OF SOIL FERTILITY.
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Alfred Vivian. with the least possible use of technical language . Be- fore taking up the subject of manures and fertilizers it is desirable to devote a short time to the considera- tion of plant food in general , explaining what it is ...
Alfred Vivian. with the least possible use of technical language . Be- fore taking up the subject of manures and fertilizers it is desirable to devote a short time to the considera- tion of plant food in general , explaining what it is ...
Página 13
... least 30 tons of water from the leaves of plants . The bottle on the left has been over the plant for some time and ... least equal to that used by vegetation , so that one acre of corn pro- bably requires a precipitation of at least ...
... least 30 tons of water from the leaves of plants . The bottle on the left has been over the plant for some time and ... least equal to that used by vegetation , so that one acre of corn pro- bably requires a precipitation of at least ...
Página 14
... LEAST AMOUNT OF WATER PER ACRE REQUIRED TO PRO- DUCE DIFFERENT YIELDS OF GRAIN Yield per acre 15 20 30 40 50 60 . Acre Inches of Water Required Wheat Barley Oats Corn 4.5 3.24 2.35 2.52 6.0 4.28 3.14 3.36 9.0 6.42 5.7 5.04 • 12.0 8.56 ...
... LEAST AMOUNT OF WATER PER ACRE REQUIRED TO PRO- DUCE DIFFERENT YIELDS OF GRAIN Yield per acre 15 20 30 40 50 60 . Acre Inches of Water Required Wheat Barley Oats Corn 4.5 3.24 2.35 2.52 6.0 4.28 3.14 3.36 9.0 6.42 5.7 5.04 • 12.0 8.56 ...
Página 31
... least some of the mineral matter was essential to plant growth . Seeds were planted in quartz - sand in pots , to one of which nitrogen compounds alone were supplied , and to the other , nitrogen and a small amount of plant ash . The ...
... least some of the mineral matter was essential to plant growth . Seeds were planted in quartz - sand in pots , to one of which nitrogen compounds alone were supplied , and to the other , nitrogen and a small amount of plant ash . The ...
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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