On the Relations between the Soil Character and the Nitrogen Utilization of the Mulberry Trees.

Abstract

Author make an experiment of the nitrogen utilization by the mulberry trees in two soils of different character for two years. The chief results are as follows; (1) Nitrogen utilization of the chief nitrogenous manures by the mulberry trees in both volcanic ash clay soil and tertiary loam soil, are as in following table;[table](2) Nitrogen utilization of each manures in tertiary loam soil are less than in volcanic ash clay soil, and then it is thought that is due to less NH_3-adsorption of tertiary loam soil than the latter.