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Mineral Constituents of Apples and the Soil
In the Annals of Botany for October is an article entitled "The Relation Between the Mineral Constituents of Apples and the Soil in Which They Are Grown," by Janet W. Brown. When the phosphates or potash in apples was compared with the available minerals in the soil, the relation was not close; but when comparison was made with the relative solubility in the soil of the separate mineral constituents the relation was found to be much closer. On this basis the mineral constituents of the apple were found to vary with the soil and were different in different orchards. The differences were probably due to differences in the mechanical composition and water content of the soil, for these influence the relative solubility of minerals present. Similarly, the quantities of magnesium and calcium found in the apples bore a direct relation to the amount
LONDON. JAMA. 1930;94(4):274-275. doi:10.1001/jama.1930.02710300046019