A systematic procedure of analysis is presented for the quantitative chemical microdetermination of twelve nutritionally important elements on single samples of plant tissue. The elements determined are calcium, magnesium, potassium, sodium,
INVESTIGATIONSbeing carried out at this laboratory on the relationships of soil fertility to the production of food crops of high nutritive value are concerned with both the macro-and the micronutrient elements. A fairly com-
INDUSTRIALAND ENGINEERING CHEMISTRY
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