Studies on the control of alternate bearing in citrus. III

Abstract

The effects of fertilizing in late autumn on the number of flowers and the growth of shoots were investigated with Satsuma orange and lemon trees from 1949 to 1956. 1. Fertilizer application in late autumn showed tendency to increase the number of flowers and shoots the next spring, but the effect was different depending on the nutritional conditions of the trees. Generally speaking, the increase in number of flowers was not remarkable. 2. Among fertilizers, nitrogen was most effective in increasing the number of flowers. The addition of phosphorus and potash did not have a marked effect. The application of phosphorus and potash without nitrogen was almost ineffective. 3. The effect of urea spray in late autumn seemed to be faster and greater than that of soil dressing.