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Application of Radioactive Tracer Technique to Studies of Phosphatic Fertilizer Utilization by Crops:
Author(s) -
Dean L. A.,
Nelson W. L.,
MacKenzie A. J.,
Armiger W. H.,
Hill W. L.
Publication year - 1948
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1948.036159950012000c0023x
Subject(s) - chemist , fertilizer , phosphate fertilizer , agriculture , citation , library science , political science , agricultural science , environmental science , chemistry , agronomy , archaeology , geography , computer science , biology , organic chemistry
L. A. DEAN, W. L. NELSON, A. J. MACKENZIE, W. H. ARMIGER, AND W. L. HiLL BY application of the tracer technique to studies of the utilization of phosphatic fertilizers it is possible to estimate the relative amounts of native and applied phosphates that are taken up by crops. In the past it has been impossible to determine what portion of the phosphorus absorbed by plants was derived from the fertilizer applied at the time of planting, and an adequate evaluation of many practices involving the use of phosphatic fertilizer materials is yet to be made. Comparisons of fertilizer materials and of practices such as fertilizer placement have been confined to relatively infertile soils that gave large responses to application of phosphatic fertilizers. However, if these same experiments are undertaken with fertilizer materials containing P, this will eliminate the need for employing soils which are abnormal in respect to their phosphorus fertility status. This paper presents a discussion of data .from four greenhouse experiments designed to study the utilization by plants of phosphatic fertilizer materials through the use of the tracer technique. Consideration was given to the effect of the phosphorus fertility of soils, character of fertilizer materials, fertilizer placement, liming, and crop species on the utilization of the fertilizer applied at the time of planting. These experiments also served as a forerunner to the field experiments reported by Nelson, et al. (2).