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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Issue 61 (1963) → A System for Evaluating Effective Weed Control in Forest Nurseries

A System for Evaluating Effective Weed Control in Forest Nurseries

Nurserymen are continually testing the effectiveness of new materials as weed control agents. However, a good evaluation of these chemicals is not always easy to obtain. This is usually because the experimentation is done on small plots with limited application rates. There are three basic methods for determining weed control. The most common is visual observation. This method usually involves only a notation of the presence or absence of weeds (1, 2), The second method, a refinement of visual observation, consists of a systematic rating system. Here the presence or absence of weeds is not only noted, but an attempt is made to classify their presence by a number (6, 7). The last, and most accurate, method is a weed count. The number of weeds is usually expressed per unit area (3, 5, 8, 9). A refinement of the count method is to weigh the weeds (4). This also is expressed per unit area.


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Author(s): Harry W. Anderson

Publication: Tree Planters' Notes - Issue 61 (1963)