Zon, Raphael, 1874-1956, Graves, Henry Solon, 1871-1951 · Washington, D.C. : U.S. Dept. of Agriculture, Forest Service · leaf 35
purpose of determining the influence which shade has upon thegrowth of 1-year-old spruce and pine. In this experiment the great-est length of stem (from the cotyledons to the terminal buds) wasfound in trees which grew in the shaded row; the length of the entireplant above ground increased with… … total length of all roots in rows with great light intensity was greaterthan the total length of all the roots in the shaded rows; in pineseven and a half times and in spruce two times; at the same time theweight of the dry substance of seedlings which grew in full lightwas greater (in pine five…
Plants Effect of light on · Trees Growth · Light Effect on trees · Tree growth
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