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SOIL ALKALINITY. II THE EFFECTS OF Na 2 CO 3 ON IRON AND MANGANESE SUPPLY TO TOMATOES
Author(s) -
MASHHADY A. S.,
ROWELL D. L.
Publication year - 1978
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1978.tb00785.x
Subject(s) - chlorosis , alkalinity , manganese , chemistry , nutrient , sodium carbonate , carbonate , sodium , agronomy , environmental chemistry , horticulture , biology , organic chemistry
Summary Sodium carbonate added to nutrient solution in sand culture depressed the growth of tomatoes both by the influence of high pH and HCO 3 − causing chlorosis and by the effect of Na + . Foliar sprays of iron and manganese removed chlorosis and increased growth but did not remove the effect of Na. In a sandy soil Na 2 CO 3 did not cause chlorosis but Na + depressed yield. Chelated Fe and Mn in the soil solutions (up to 7.3 × 10 −4 M Fe and 2.6 × 10 −5 M Mn at pH 9.0) were sufficient to supply the crop needs as shown by a second sand culture experiment where plants were fed with nutrient solution plus extracted soil solution.