Acre

A measure of land area. One acre is 4840 square yards, or 0.405 hectare. Acropetal

Growing upwards so that the oldest parts are at the base and the youngest at the tip. Adlay

See: Coix lachryma-jobi. Adult plant resistance

Horizontal resistance in many crops, particularly the cereals, is often expressed more in mature plants, and less in young seedlings. This is to be expected because the epidemic intensifies as the growing season progresses. For this reason, horizontal resistance is often called adult plant resistance and, by implication, it is more difficult to observe it, measure it, or screen for it, in young plants.

Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

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