Technical Bulletin - Michigan Agricultural Experiment Station (East Lansing).

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Michigan State University, Agricultural Experiment Station, 1916 - Agriculture

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Page 23 - ... expected. Jones attempted to explain these abnormal results by assuming that these hydrates take up water, forming complex compounds with it, and thus remove it from the field of action as far as the freezing point lowering is concerned. Many other evidences could be cited which go to indicate that part of the water contained by the soils exists in an inactive or unavoidable form but the foregoing may be considered sufficient, (fl) Jour.
Page 22 - ... available for the same purpose. It would be natural, therefore, that the depression of the freezing point would be many times greater at the low moisture content than at the high than would be expected from the difference of the total moisture content, just as the experimental data really indicate. This hypothesis also assumes (and the assumption seems to have been proved) that the percentage of inactive water is greater at the low than at the high moisture content and tends to decrease from...
Page 13 - ... furfural on treatment with acid it is very likely that a very considerable amount of the total humin nitrogen found is due to the presence of carbohydrates in the soil, which give rise to furfural during hydrolysis. This may combine with certain of the nitrogenous compounds and cause an increase hi the humin nitrogen, as well as adsorb or occlude nitrogenous compounds in the "humin" formed from furfural by polymerization.
Page 14 - The most significant fact brought out by this study is that the organic nitrogen distribution in different soil types is very uniform. This is to be expected, since it has been pointed out that the nitrogen distribution in soils is an average distribution of all the plant and animal nitrogenous products that find their way into the soil.
Page 8 - C. held for thirty minutes would be sufficiently high to afford protection against pathogenic bacteria and yet would leave in the milk the maximum proportion of lactic-acid bacteria and the group proportions would be very similar to those of all grades of market milk.
Page 14 - The strength and volume of the hydrochloric acid used in hydrolysis has little effect on the nitrogen distribution of the hydrolysate. provided acid as strong as constant boiling acid is used, in the proportion of at least two parts of acid to one of soil.
Page 14 - ... as strong as constant boiling acid is used, in the proportion of at least two parts of acid to one of soil. 8. Results gained from a study of different soils indicate that the organic nitrogen dissolves during hydrolysis, to almost the same extent regardless of the origin and nature of the soil. 9. Some very interesting figures are found in the comparison of the different extracts from sphagnum-covered peat. The portion soluble in sodium hydroxide and not precipitated by hydrochloric acid, gives...
Page 32 - The view is held, therefore, that the. wilting at this critical soil moisture content must be due to the increasing slowness of water movement from soil particle to soil particle, and from these to the root hairs, the rate of movement falling below that necessary to maintain turgidity of the cells of the aerial parts, even under conditions of low transpiration.

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