What is the function and effect of urea fertilizer? Please read your introduction below. Urea fertilizer is a white granular substance. Can increase the nitrogen content of plants. Promote the production of new leaves and branches, especially in early spring. Secondly, urea fertilizer can make the branches and leaves of plants green. Reduce the possibility of yellowing. Thirdly, urea fertilizer can inhibit the differentiation of flower buds. To a certain extent, the effect of thinning flowers. Fourthly, urea fertilizer can also play a role in thinning fruit. By applying urea fertilizer, a large number of fruits on the branches can be thinned, thus making the fruits huge.