Effective farming; a text-book for Effective farming; a text-book for American schools effectivefarming00samp Year: 1919 Fruit-growing 243 144. Air drainage in fruit-culture. — An important factor in fruit production is air drainage. Cold air is heavier than warm air and drains down hill and remains in low places, and these areas are more subject to frost than higher areas. Frost at blossoming time will injure the blossoms. Often when orchards are planted on hillsides, the blossoms on trees near the bottom of the hill will be injured by frost, while those higher up the slope will escape damag
Effective farming; a text-book for Effective farming; a text-book for American schools effectivefarming00samp Year: 1919 Fruit-growing 243 144. Air drainage in fruit-culture. — An important factor in fruit production is air drainage. Cold air is heavier than warm air and drains down hill and remains in low places, and these areas are more subject to frost than higher areas. Frost at blossoming time will injure the blossoms. Often when orchards are planted on hillsides, the blossoms on trees near the bottom of the hill will be injured by frost, while those higher up the slope will escape damage. Thus the se- lection of a site where late frosts seldom kill the blossoms is of im- portance. 145. Pruning of fruit- trees.— A phase of work that must be given proper attention by an orchardist is the prun- ing of the trees. Prun- ing means the removal of certain branches. This is done in order to allow the remaining ones sufficient room and fight for proper develop- ment. Figs. 99 and 100 show a peach tree before and after pruning. Most trees produce too many branches. In trees that grow naturally, the surplus branches are crowded out by Fig. Peach tree in need of pruning.
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