. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. THE GROWING PLANT 51 cuticle (64), the number of stomata (65), and so on. Some plants, as purslane, the sedums and cacti, have special water-storing tissues, from which transpiration is extremely slow. Experiments indicate that the transpiration from most leaves is between one-third and one-sixth as much as the evaporation from an equal area of water. When we take into account the immense leaf surface of a large tree, it is evident that the aggregate transpiration must be very great, as
. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. THE GROWING PLANT 51 cuticle (64), the number of stomata (65), and so on. Some plants, as purslane, the sedums and cacti, have special water-storing tissues, from which transpiration is extremely slow. Experiments indicate that the transpiration from most leaves is between one-third and one-sixth as much as the evaporation from an equal area of water. When we take into account the immense leaf surface of a large tree, it is evident that the aggregate transpiration must be very great, as is often illustrated by the dwarfing in-. FiG. 26. — Competition: showing how a spruce hedge dwarfs an adjacent crop in dry weather. fluence of trees upon adjacent crops in dry weather (Fig. 26). Transpiration is much more rapid during dry than during wet weather, and in the rare atmos- phere of high altitudes than in the denser atmosphere of low lands. Excessive transpiration, as occurs in very dry weather, is detrimental to plants, since it reduces the water pres- sure within the cells below the point where healthful ' growth can take place (62); but normal transpiration , not sufficient in amount to interfere with healthful growth, is doubtless beneficial, since it aids in carrying. 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 Goff, E. S. (Emmett Stull), 1852-1902; Moore, J. G. (James Garfield); Jones, L. R. (Lewis Ralph), 1864-1945. New York, Macmillan
Size: 2623px × 953px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdec, booksubjectbotany, booksubjectgardening
