. How crops grow. A treatise on the chemical composition, structure, and life of the plant, for all students of agriculture ... Agricultural chemistry; Growth (Plants). 236 HOW CKOPS cap to protect the true termination or living point of the root in its act of penetrating the soil. Fig. 36 represents a magnified section of part of a barley root, showing the loose cells which slough oS from the tip. These cells are filled with air in- stead of sap. A most strik- ing illustra- tion of the root - cap is furnished by ip^^ the air-roots j^^"*" of the so- ..Si^^fi^ """
. How crops grow. A treatise on the chemical composition, structure, and life of the plant, for all students of agriculture ... Agricultural chemistry; Growth (Plants). 236 HOW CKOPS cap to protect the true termination or living point of the root in its act of penetrating the soil. Fig. 36 represents a magnified section of part of a barley root, showing the loose cells which slough oS from the tip. These cells are filled with air in- stead of sap. A most strik- ing illustra- tion of the root - cap is furnished by ip^^ the air-roots j^^"*" of the so- ..Si^^fi^ """ called Screw â ^ Pine,(PaHaa- 8'' nus odoratis- simus,) exhibited in natural dimen- sions, in fig. 37. These air-roots issue from the stem above the ground, and, growing downwards, enter the soil, and become roots in the ordinary sense. When fresh, the diameter of the root is quite uniform, but the parts above the root-cap shrink on drying, while the root-cap itself retains nearly its original dimensions, and thus reveals its different structure. Distinction between Root and Stem.âNot all the subterranean parts of the plant are roots in a proper sense, although commonly spoken of as such. The tubers of the potato and artichoke, and the fleshy horizontal parts of the sweet-flag and pepper-root, are merely underground stems, of which many varieties exist. These and all other stems arc easily distinguished from Digitized by Microsoft®. 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 Johnson, Samuel William, 1830-1909. New York, O. Judd & company
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectagricul, bookyear1868
