. Bulletin. Agriculture -- Ontario. '1^>^:. oat and corn plants have no such main root, having only the smaller roots ex- ^'^ tending out from the base of the ste m. '. 10. Showing the tubers arisinjj from the stem and quite distinct from the roots of the potato plant. Hence the oat and corn plants are much more shallow-rooted than the clover or burdock. If you will pull up a number of plants you will find some like the corn and others like the burdock or clover, some with very deep and others with very shallow roots. This is one of the many reasons why a good farmer grows different crops a
. Bulletin. Agriculture -- Ontario. '1^>^:. oat and corn plants have no such main root, having only the smaller roots ex- ^'^ tending out from the base of the ste m. '. 10. Showing the tubers arisinjj from the stem and quite distinct from the roots of the potato plant. Hence the oat and corn plants are much more shallow-rooted than the clover or burdock. If you will pull up a number of plants you will find some like the corn and others like the burdock or clover, some with very deep and others with very shallow roots. This is one of the many reasons why a good farmer grows different crops and not alwavs the same crops, or, as it is called, follows a " rotation of crops " on the same field from year to year. One year he may grow deep-rooted plants, and these will feed upon the food that is deep down in the earth, and the next year he will grow more shallow- rooted plants, which will feed in another part of the soil; and thus the plants are not so likely to use up all the food from any one part of the soil. This main root, which vou noticed in the clover or burdock is called the primary root. The smaller roots growing from the primary root are called second- arv roots These in turn mav branch, producing third or tertiary roots, and so on until the whole root system of the plant is formed. When the Fig. 11. Showing root system of nrimwrv rnnt iv; vprv miirh laro-pr clover and oats. Note the main root Pilmfl'} rOOl IS \ er\ mucU larger of the clover extending deep down into than the Secondary roots, as we the soil and the fibrous or more shal- , , , -^^ low roots of the oat plant. have already seen in the beet, carrot, turnip, and dandelion, it is called the tap root. In the case of the corn or oat plant, you will not have noticed any primary roots. As a matter of fact, if you were. 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
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