The thesis found on the force which on the wheat root cutting machine, based on the serial communication between microcontroller and PC, designed the wheat root-cutting machine operate parameter measuring system with assemble language and VB, realized the real time measure to the resistance of the wheat root cutting and velocity.

A winter wheat with root excision was chosen to determine whether 1) root biomass or R/S (root/shoot ratio) is reduced by root excision, 2) competitive ability is reduced by root excision and its link with R/S and 3) competitive ability influences crop production.

Fluorescence quenching was adopted to probe the effects of root excision on fluorescent properties as well as on the yield of winter wheat under different moisture circumstances.

Holland Snowball was studied by the way of removing leaves,cutting root and connolling conditions of different fertility and water.

The effects of different cutting roots and fertilization measure on soil nutrient,microbe quantity and enzyme activity both rhizosphere and non-rhizosphere soil in I-107 poplar plantation were studied by field plot experiment.

Study on the Growth and Roots Regeneration of Ginkgo after Root-cutted with the Treatment of Fertilization in Urban Landscape;