Four thinning intensities with the reserved densities of 5 600,4 100,3 700 and 1 830 tree/hm2,and a concontrol,with reserve density of 8 000 tree/hm2 were established in the 9-year-old air-seeded Pinus tabulaeformis stands in of Yanqing Country,Bejing.

A reserve density of 1 500 trees/hm~2 was considered to be optimum, giving the maximum annual growth in tree height (0.

The effect of reserve density and exposure on the aerial seeding forests of Pinus tabalaeformis were studied according to the investigating data of standard site of Liuling forestry centre in Danfeng-county.

In this paper the relationships between forest density and index of decline disease, and soil moisture content were studied and determined in Pinus taeda plantations in Anhui province.

Through real surveying material, the paper determines the influence of forest density and felling intensity to stander damage and finds out changing regulation.

The structure characters of broad-leaved woodland I.The relationship between stand age and stand density;

Effects of Pinus massoniana plantation stand density on understory vegetation and soil properties

Relations of stand density and the biomass of the artificial young Larix principis-rupprechtii forest