Dynamics of soil animals during decomposition of Korean pine stump.;

Fungi s dynamic development during the period of Populus davidiana stump decomposition in the broadleaved-Korean pine forests;

The dynamic of soil animals in the decomposing process of Quercus mongolica stump;

On stump grafting techniques of Populus tomentosa;

Effect analysis of stump grafting technique of Populus euramericana clone 74/76 ;

This paper introduces basic structure and main function of the eliminating roots robot,deduces manipulator’s kinematics equation by using homogeneous transform,kinematics analyses in view of four steps which need servo control in the working program and static force calculates one of them to find theoretic foundation for design of its control system.