| OCR Text |
Show 78 Utah "Academy of Sciences, Arts and Letters has not been the optimum temperature of the soil micro flora because the soil reached, whereas another soil may be an early the needed lower temperature at a available render micro flora can temperature constituents. (3) The soil having a high optimum which, if they find their way may carry thermophilic organisms, cause spoilage, as it should be onto or into food products, may measured are the same remembered that some of these processes in food spoilage. processes that occur SUMMARY in the deter and nitrogen fixing' mination of numbers, ammonifying, nitrifying different optimum temperatures. In all soils except powers showed for the maximum bacterial counts one, the optimum temperature at 20° C. The optimum tempera was it one that in was at 30° C., between 40° C. and 50° C. ture for ammonia accumulation was accumulation varied, in some soils it was nitrate for The optimum all cases it was lower than 20° C. and in others it was 30° C. In Different soils incubated at varying temperatures .. .. fixation proceeds for optimum ammonia accumulation. Nitrogen becomes and 10° C. quite active at 20° C. at a measurable rate at Nitrification is often stopped at C 30° at maximum its reaches It at this temperature, and 40° C. Nitrogen fixation is seldom stopped ammonification never in the soils tested. |
