Abstract
1. Native strain of red clover produced at Nat. Inst.' Agr. Sci. (Chiba, Japan) was sown on Apr. 27, 1951, in two sub plots. af thick and thin plantings arranged at random in three main plots of nitrogen-fertilization, nodule bacteriainoculation and non-treatment, the treatments being triplicated. The number of plants per unit area in a thin planting plot was one-fourth as many as in a thick one so as to grow a plant per 10xl2cm area in the former and per 5x6cnl area in the latter. The piants were taken up from the ground on Aug. 8 in the early bloom stage, and plant lleight and tol'o flesh weight were measured per plant. The same treatments were carried out in the pot experiment to find the individuai difference of scveral quantitative characters of the seedlings and the effect of treatments. one hundred' swelled seeds were sown in each pot filled with the **oil sterilized with formalin. The seedlings were dugged up from the pots+ on Juni 15, Jun. 21 and Jul. 2, respectively. The measurement was made of several characters of tops and root.
