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Show UTAH SOIL EXPERTS PUBLISH ARTICLE Special to The Tribune. LOGAN, Aug. 28. A recent issue of "Soil Science" contains an article by Dr. J. E. Greaves, chemist and bacteriologist, and E. G. Carter, assistant chemist and bacteriologist, at the experiment station of the Utah Agricultural college, entitled "The Action of Some Common Soil Amendments." The paper is' devoted to a discussion and presentation of experimental results of the value of various fertilizers. The paper contains 165 references on phases of this subject. One feature of the paper is the statement state-ment that the element which produces the growth is often not the one that was added at all, but one which was already in the soil, but in an insoluble form; the element added changes it to a soluble form in which the plant can use it. The authors state that in the case of at least sodium chloride, iron sulphate and the sulphates of most of the salts the stimulation of growth was due to increased in-creased available phosphorus, an element which was not present in the compounds added. In the case of calcium sulphate and other compounds of a similar nature the stimulation of growth was due to the increased amount of available nitrogen, another element not contained in the compound added. |