The rice plant, coix Lacryma-jobi, L.and whcat plant were separately cultured in solutions of sulfate and chloride, each of which contains N=40,K_2O=40,MgO=40,Fe_2O_3=5,CaO=40 p.p.m, and the two solutions were both divided into two divisions, one of them contains 20 p.p.m of p_2O_5,and the other 3p.p.m of it. And it was observed that, comparing the results of growth, yield and analysis.between the two solutions of sulfate and chloride.the result in the division of 3p.p.m of P_2O_5 was more remarkable than that in the division of 20p.p.m of P_2O_5. Thus we can notice that "Boas Effest" of sulphate and chloride for the phosphrous is seen in any case of these plants. But the degree of the effect is most remarkable in the case of wheat plant, less in the case of coix Lacryma-jobi, L.and the least in the case of rice plant.After all, we can say that Boas phenomenon is changable according to the natures of the plants.