题目内容

The main problems in the utilization of soil resources in China include:

A. The aimless exploitation and utilization of soil resources
B. The productive potential of soil has not been fully exploited
C. Serious soil degradation and deterioration ecological environment
D. Use change of arable land occurs rapidly

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The shortcomings of School of Agricultural Geology are they regard weathering process as soil forming process; they treat weathering products as soils; they also overlook the essential differences among soil, parent material and rock; they ignore the role of organisms in soil formation and fertility development, and overemphasizes the leaching of minerals.

Soil is the basis for formulating measures to increase production in agriculture and forestry.

There is a distinctive boundary between effective and potential fertility, and they cannot transform into each other.

According to the sources of soil fertility, it can be divided into effective and potential fertility.