The main features of sulfonyl urea herbicides application in the process of cultivation of conifer planting material in forest

Abstract

Researches have shown that the efficiency of sulfonylurea herbicides strongly is influenced by soil acidity and the content of a humus. Use of herbicide Terrsan in sowings of the first year of a Pinus silvestris in the dosage of 30 g/ha is possible at pH to 5.5 pH and humus content of more than 3%. At acidity 5.5–6.0 рН and the content of a humus less than 3% the application dose should not exceed 20 g/hа. In sowings of Picea abies at the content of a humus more than 2% it is possible to use dosing 20 g/ha. At lower content of a humus an entering dose should not exceed 10 g/ha.