First Principles of Soil FertilityKegan Paul, Trench, Trubner, 1910 - 265 páginas |
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Página 8
... ingredients found there . For the purpose of this study the corn , or maize , plant is chosen , as it is perhaps the most important of all plants to the American farmer . Before presenting the analysis it is advisable to devote a moment ...
... ingredients found there . For the purpose of this study the corn , or maize , plant is chosen , as it is perhaps the most important of all plants to the American farmer . Before presenting the analysis it is advisable to devote a moment ...
Página 10
... ingredients found in 1,000 pounds of the matured corn plant , i . e . when the plant is in condition to be cut for shocking . From what has been said it will be seen that of the elements known only thirteen are found in plants ; for ...
... ingredients found in 1,000 pounds of the matured corn plant , i . e . when the plant is in condition to be cut for shocking . From what has been said it will be seen that of the elements known only thirteen are found in plants ; for ...
Página 31
... ingredients are necessary to the plant . A very simple experiment was sufficient to show that at least some of the mineral matter was essential to plant growth . Seeds were planted in quartz - sand in pots , to one of which nitrogen ...
... ingredients are necessary to the plant . A very simple experiment was sufficient to show that at least some of the mineral matter was essential to plant growth . Seeds were planted in quartz - sand in pots , to one of which nitrogen ...
Página 32
... ingredients are 1 2 5 6 7 8 9 10 11 12 Experiment to show the essential elements of plant food . Numbers 4 , 7 , and 11 received all the elements of plant food while one element was withheld in each of the other tests essential . This ...
... ingredients are 1 2 5 6 7 8 9 10 11 12 Experiment to show the essential elements of plant food . Numbers 4 , 7 , and 11 received all the elements of plant food while one element was withheld in each of the other tests essential . This ...
Página 36
... ingredients of the soil , including nitrogen in the form of nitrates . The root hairs absorb the mois- ture as it is ... ingredient when it has all that is needed for its growth . This " selective power " of the plant ( if it may be so ...
... ingredients of the soil , including nitrogen in the form of nitrates . The root hairs absorb the mois- ture as it is ... ingredient when it has all that is needed for its growth . This " selective power " of the plant ( if it may be so ...
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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