Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 CHAPTER XX IMPROVING PLANTS AND SEEDS 202. Domesticated Plants. The cultivated plants were originally wild sorts. Some of them have been cultivated so long and so improved by man's care that the original or wild form is not certainly recognized, such as wheat, potato, onion, cabbage, etc. Other sorts have been brought into cultivation in comparatively recent times, and the original wild form is well known, as the tomato, carrot, chrysanthemum. Cul
Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 CHAPTER XX IMPROVING PLANTS AND SEEDS 202. Domesticated Plants. The cultivated plants were originally wild sorts. Some of them have been cultivated so long and so improved by man's care that the original or wild form is not certainly recognized, such as wheat, potato, onion, cabbage, etc. Other sorts have been brought into cultivation in comparatively recent times, and the original wild form is well known, as the tomato, carrot, chrysanthemum. Cultivated forms are vastly superior to the wild forms. The strawberries of our gardens are more palatable and productive than the wild sorts. The cultivated tomato is much larger and firmer than the original wild form. Wherever a plant has been long under cultivation it has been greatly modified. We may ask, 'How are these improvements secured?' 203. Variation in Plants is the starting point for improvement. Scientists have a theory that all the plant and animal forms de- scended from some common ancestor. This theory of the origin of living forms, called the 'theory of evolution,' finds its support in the similarity oi many forms, suggesting rela- tionship, and the further fact that, through natural varia- ^,, . ' ° Fig. 83. Old-time and new-time tion, new forms are constantly forms of tomato. After Bailey. (139)
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