Soil liming investigations. IV. The influence of lime on yields and on the chemical composition of plants
1937
Naftel, J.A.
In a study of the influence of lime on the growth and composition of plants, six successive crops were grown in the greenhouse and the plants from one of the crops were analysed. This investigation included studies of kinds of lime, both CACO3 and CaMG(CO3)2, amounts of lime, different degrees of saturation, and soil type as they affect the growth and composition of plants. The results may be briefly summarized as follows: Crop yields were increased on the Norfolk, Hartsells, and Cecil series of soils by liming. The third increment of lime, equivalent to 75% of the Ca-sorption capacity of the soils, was generally found to be the optimum rate of liming on these soils. The crops used gave little response to lime on the Decatur and Kalmia soils since these soils in their native states are highly saturated with bases. A greater growth response was obtained from Ca.Mg lime than from Ca lime. This was especially true for the last two crops grown on the lighter-textured soils. Liming with increasing increments of CACO3 increased the percentage Ca in the plants but decreased the Mg, K, P, Mn, and Fe. This was especially true on the light-textured soils and to the extent that certain mineral constituents of the crops were considerably decreased. Where the soils were limed with CaMg(CO3)2, there were similar decreases in mineral content, with the exception of Mg which was increased.
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