最小律の数式表現と報酬漸減に伴う経済的施肥量の算出法に就て

抄録

1. As the quantitative estimation of the law of Minimum, the calculated value by the following formula , , a'' is much more in accord with the real amount of crop production than the formula , , b'' : - y = A + Bx - Cx^2 ........................ (a) log(A - y) =K - Cx ................... (b) In these formula A (in the formula , , a''), B, C and K are constant, and A (in the formula , , b'') represents the maximum amount of crop production while y denotes the amount of crop production when minimum element x in applied. 2. The method of calculation of economical quantity of certain fertilizer appliablo in connection with the law of diminishing return was given by the above mentioned formula , , a'' in the case of rice culture.