Abstract
(A) The pH value of roots of crops susceptible to soil acidity was decreased when grown in the culture solution of low pH value. (B) Rye, wheat, rape and barley were grown in acidic soil and the separation and identification of organic acids ill each organs were carried out. (1) In the roots of less resisting crops to soil acidity, the content of citric acid was found to be low. (2) And in the leaf-blade of these susceptible crops to acidic soil, the content of citric acid, malic acid, croup 4 (lactic, succinic, α-Ketoglutaric acid) and Gr. 3 (formic, fumaric acid) was found to be higher, but Gr. 5 (trans-aconitic acid et) and Gr. 6 (oxalic, glicolic, cisaconitic acid) were found to be in low concentration.
