. Better fruit. Fruit-culture. BETTER FRUIT AN ILLUSTRATED MAGAZINE PUBLISHED MONTHLY IN THE INTEREST OF MODERN. PROGRESSIVE FRUIT GROWING AND MARKETING Pruning—Plant Physiology as Related to Pruning By W. M. Atwood, Associate Professor o [iNTHODUCTioN.—The Department of Botany, in co-operation with the Division of Horticul- ture, has prepared this treatise on pruning. Dr. Atwood of the Department of Botany pre- paring the chapter on Plant Physiology as Be- lated to Pruning. The Division of Horticulture has been working for a number of years on research problems related to pruning. As this wor
. Better fruit. Fruit-culture. BETTER FRUIT AN ILLUSTRATED MAGAZINE PUBLISHED MONTHLY IN THE INTEREST OF MODERN. PROGRESSIVE FRUIT GROWING AND MARKETING Pruning—Plant Physiology as Related to Pruning By W. M. Atwood, Associate Professor o [iNTHODUCTioN.—The Department of Botany, in co-operation with the Division of Horticul- ture, has prepared this treatise on pruning. Dr. Atwood of the Department of Botany pre- paring the chapter on Plant Physiology as Be- lated to Pruning. The Division of Horticulture has been working for a number of years on research problems related to pruning. As this work is in the preliminary stages, it will be a number of years before a complete report can be made. However, in the various papers in this article we are presenting a few of the facts which we have been able to determine, coupled w ith observations that have been made in various fruit-growing districts.—C. I. Lewis, Chief, Division of Horticulture.] FOR the orchardist most correctly to deal with the problems confronting him, it is necessary to have a clear idea of the complicated "living machin- ery" upon which he is dependent for profit or loss. It is worth while to know how the tree removes from the soil the substances it needs; how it manufactures its food, and finally how both the complicated food materials and water are distributed and used by the tree. The knowledge of a few facts of this na- ture is the necessary foundation on which is being built the suc- cessful practices of the practical fruit grower of today. If the finest ter- minal roots of most living plants be care- fully examined there is found on their sur- faces a fuzzy growth resembling fine hairs. As the root is the region in which the plant absorbs the water and minerals of the soil, it is evi- dent that this absorb- ing region of the root —the root hair region —must tremendously increase the ab- sorbing area of the root. Figure 1 shows a young root with the root hair zone well developed.
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