File:Image from page 211 of "Report of the State highway commission on the Iowa lakes and lake beds" (1917) (14748133341).jpg

Identifier: reportofstatehig00iowa Title: Report of the State highway commission on the Iowa lakes and lake beds Year: 1917 (1910s) Authors: Iowa. Highway Commission Subjects: Lakes Forests and forestry Blackbirds Publisher: Des Moines, Pub. by the state of Iowa Contributing Library: The Library of Congress Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image: enorthern part of the State: show that the Cottonwood, under favorableconditions, will make a diameter growth of about 1 inch and an averageheight growth of 3 to 5 feet per year, during the first twenty to thirtyyears. The tree is relatively short-lived, reaching its maturity between 204 LAKES AND LAKE BEDS OF IOWA thirty and forty years. This makes this tree somewhat less desirablefor forestation work, however, it is a tree that will make good showingin a relatively short time. It will make a good growth on over-flowedland and probably next to the willow, will endure as wet a soil as anyof Iowas trees. The cottonwood will be very serviceable for beginning certain planta-tions along the lake shores where protection is needed for some of themore permanent trees which are to be planted. As a timber producer, no other tree in Iowa is better. Measurementsof a large number of plantations shows that in thirty to forty-fiveyears time as much as 50,000 board feet per acre, in addition to cord

Text Appearing After Image: Fig. 94—This photograph shows young cottonwood trees, which are making a thriftygrowth on overflow lands. At the time this picture was taken the water wasseveral inches deep, and remained at this depth for several weeks without injuryto the trees. The cottonwood is one of the most desirable trees for planting onareas which are subject to overflow at certain periods of the year. This tree isalso desirable for planting where quick results are desired, since it is one of thefastest growing species found in the state. wood, can be produced under conditions which are not most favorablefor tree growth. POSSIBILITIES OF RE-FORESTATION 205 Elms: Both the white elm and red elm should be used extensively intlic torestation work about Iowas lakes. The trees, in addition to be-ing rather rapid in growth, are among our most desirable shade trees.Both of these species thrive best on a moist soil. Hackberry; The hackberry is closely related to the elms. It is a treewhich will make quite a satisfac

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