These experiments were made to study the effect of the edges in the control of germination. And the growth of weeds of some kind. The experiment was done in the laboratory of the Faculty of agriculture. Natural resources and environment, University.2 experiment
.Experiment 1 to find parts of the edges of most substances allelopathy, divided into 4 portions, stem, leaf, root, and the tree by using solvent. Is alcohol 70% and extracts from various parts. The edges of the concentrations, 1000 2 000 4,, and, 000 8 000 ppm found that all the extracts from odoratum by L clump ฮล์ 70% as solvent, concentration, 4 since level000 ppm degree affecting the inhibition of germination and root length, stem spinach. The extracts of the leaves 70% odoratum by alcohol solvent, concentration, since 4000 ppm up could inhibit seed germination and root length, stem of barnyard grass. So parts of the edges with allelopathy most is the trees, leaves and roots ตามลำดับ
.Experiment 2 to Soxhlet extraction from the rough edges by a solvent 4 types. 70% hexane alcohol Ethylene ethyl acetate and butanol เตรต
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