. Carnegie Institution of Washington publication. 116 Guayule. THE EFFECT OF ABUNDANT WATER UPON ANATOMICAL The effect of irrigation upon the structure of the mature plant is very marked. This is especially noticeable with respect to the relative volumes of the wood cylinder (including pith and medullary rays) and the "bark" (cortex and cork). As this is a question of prime importance economic- ally, it will be treated first. By means of weighing, Whittelsey (1909) determined that, in vari- ous portions of the plant, the trunks are made up of 44 to 65 per cent bark (corte
. Carnegie Institution of Washington publication. 116 Guayule. THE EFFECT OF ABUNDANT WATER UPON ANATOMICAL The effect of irrigation upon the structure of the mature plant is very marked. This is especially noticeable with respect to the relative volumes of the wood cylinder (including pith and medullary rays) and the "bark" (cortex and cork). As this is a question of prime importance economic- ally, it will be treated first. By means of weighing, Whittelsey (1909) determined that, in vari- ous portions of the plant, the trunks are made up of 44 to 65 per cent bark (cortex and cork), the amount of bark being relatively larger in the smaller twigs. The material was quite dry. (Table 40, page 115.) In Whittelsey's determinations, the pieces examined were first steamed to render it possible to separate the wood from the cortex. A slight ffet Her. Zrrig. field Irr~ig- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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