and 2 manural loessial soil, 1 dark loessial soil, 1 loessial and 1 yellow cinnamon soil were used to study the effects of soil properties on the rate of urea hydrolyses.

• 以2种红油土、1种黄绵土、1种黑垆土和1种黄褐土为供试土样，研究了土壤性质对尿素水解速率的影响。