First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 8
... Elements and Compounds . - Chemistry teaches that all matter is composed of simple substances called ele- ments . Between 70 and 80 of them are known . They are called elements because they are the simplest sub- stances known , and can ...
... Elements and Compounds . - Chemistry teaches that all matter is composed of simple substances called ele- ments . Between 70 and 80 of them are known . They are called elements because they are the simplest sub- stances known , and can ...
Página 9
... elements . Such bodies are called compounds . While the number of elements is small there are many thousands of com- pounds . This is due to the fact that the same elements can combine in many different ways , each combination forming a ...
... elements . Such bodies are called compounds . While the number of elements is small there are many thousands of com- pounds . This is due to the fact that the same elements can combine in many different ways , each combination forming a ...
Página 10
... elements known only thirteen are found in plants ; for what is true of the corn plant holds true of all other plants . It will be shown that of these thirteen , three are probably not necessary to plant growth , leaving only ten elements ...
... elements known only thirteen are found in plants ; for what is true of the corn plant holds true of all other plants . It will be shown that of these thirteen , three are probably not necessary to plant growth , leaving only ten elements ...
Página 11
Alfred Vivian. that three elements ( i . e . hydrogen , oxygen and car- bon ) make up 981⁄2 per cent of the entire composition of the plant , the remaining elements constituting only 11⁄2 per cent . COMPOSITION OF THE CORN PLANT Water ...
Alfred Vivian. that three elements ( i . e . hydrogen , oxygen and car- bon ) make up 981⁄2 per cent of the entire composition of the plant , the remaining elements constituting only 11⁄2 per cent . COMPOSITION OF THE CORN PLANT Water ...
Página 17
... element carbon , all of which is derived from the car- bonic acid gas which is present in the atmosphere . Carbonic acid is ... elements carbon and oxygen . Charcoal is a good example of nearly pure carbon . Carbonic acid gas is found ...
... element carbon , all of which is derived from the car- bonic acid gas which is present in the atmosphere . Carbonic acid is ... elements carbon and oxygen . Charcoal is a good example of nearly pure carbon . Carbonic acid gas is found ...
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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