Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 2 · column 2 of 2 · from the scan, no model involved
NEARLY EVERY YEAR we receive several calls from people who are concerned about black walnut trees killing other plants which grow near by. The problem is not serious. The black walnut seems to be toxic to only a few plants. The toxic effect which black walnut trees have on some other plants is caused by a substance called juglone, which is produced in the roots. This is a rather unique situation as there are few plants which produce substances which are toxic to other plants.
We do not know exactly how this juglone material causes its toxic effect. We do know that the roots of the injured plant must come in direct contact with the root of the black walnut tree. Therefore, the damaged plants must be growing close to the walnut, and within the spread of its root system.
The black walnut damages relatively few plants that are grown around the home. Vegetables may be planted near walnut trees except for potatoes and tomatoes, which will be killed. Since trees use a large amount of soil moisture, you will need to consider this fact too, when planting vegetables.
92.4%