. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. MANURE 217 monia leads to an increased production of nitrates. This process is accelerated proportionately to a greater extent than is ammoni- fication, as may be seen from Fig. 44. Moreover, there is a much ^oeo aoo ^fSO £00 /SO /60 m> JSO 11] P£/?c^r/rorMAcT£P//ii pffp c£vr OF M7i^c/wrPos£A/ closer correlation between in- creased nitrification and in- creased crop yield due to the use of farmyard manure than there is between increased ammonifi- cation and increased yield. This Is what one would expect
. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. MANURE 217 monia leads to an increased production of nitrates. This process is accelerated proportionately to a greater extent than is ammoni- fication, as may be seen from Fig. 44. Moreover, there is a much ^oeo aoo ^fSO £00 /SO /60 m> JSO 11] P£/?c^r/rorMAcT£P//ii pffp c£vr OF M7i^c/wrPos£A/ closer correlation between in- creased nitrification and in- creased crop yield due to the use of farmyard manure than there is between increased ammonifi- cation and increased yield. This Is what one would expect when it is recalled that it is the nitrates and not the ammonia upon which plants feed. Green Manure.— Farm ma- nure can be obtained only vn con- junction with livestock farming, whereas green manure can be produced and used on all farms. In its use there are several prin- ciples which must be borne in mind. 1. Legumes feed first on the combined nitrogen of the soil and only turn to the atmosphere when the soil supply is insuiB- cient. 2. Legumes can feed on at- mospheric nitrogen only when properly inoculated. 3. One ton of alfalfa hay carries fifty pounds of nitrogen, whereas one ton of clover or pea hay carries approximately forty pounds of nitrogen. In addition to carrying to the soil the above named quantities of nitrogen, green manures also carry large quantities of organic matter which furnish food for the soil microflora, and during the. A© AM/VOWff- S7XWS Fig. 44.~inustrating the influence of manure on yield of corn and bacterial activities of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Greaves, Joseph Eames, 1880-; Greaves, Ethelyn O. , joint author. New York, D. Van Nostrand Co.
Size: 1178px × 2120px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteriologyagricult
