According to the study on the diversity of undergrowth plants in planted and natural forests in semi-humid rolling loess region of northern Shaanxi,life form spectrum of undergrowth in most forests do dominated by phanerophytes except for the forests of Populus.

Evaluation of adaptability of conservation tillage in Loess Plateau semi-arid areas;

Characteristics of atmospheric aerosols over semi-arid region of Loess Plateau;

Afforestation Techniques of Main Tree Species on Loess Plateau;

The benefit and prospect of farmland mulcb on Loess Plateau.;

Dry soil layer forming and soil moisture restoration of alfalfa grassland in the semi-humid region of the Loess Plateau;

Observation of the vertical distribution characteristics of farmland wind-erosion dust over semi-humid region using two methods showed that the wind-erosion in semi-humid region was weak and the wind-erosion dust which mainly composed of extremely fine sand and silt was thin.