. Agriculture for southern schools. e clover germs there (Fig. in). He can do this by sowing in that place soil from a field where clover has turned loose its millions of germs. If he wishes to grow alfalfa, he must likewise sow on the new field soil from an old alfalfa field. Inoculation is the name given to this placing of the proper germs where they can form tubercles. To inoculate a legume is to bring the proper germs to its roots (Figs. 112, 113, 114). How to inoculate leg-umes.— Legumes can be in-oculated in several ways,(i) by sowing soil, (2) bydipping the seed in watermixed with this
. Agriculture for southern schools. e clover germs there (Fig. in). He can do this by sowing in that place soil from a field where clover has turned loose its millions of germs. If he wishes to grow alfalfa, he must likewise sow on the new field soil from an old alfalfa field. Inoculation is the name given to this placing of the proper germs where they can form tubercles. To inoculate a legume is to bring the proper germs to its roots (Figs. 112, 113, 114). How to inoculate leg-umes.— Legumes can be in-oculated in several ways,(i) by sowing soil, (2) bydipping the seed in watermixed with this soil, or (3)by mixing the seed witha special preparation madeoriginally from ground-up tubercles of a plant like thatto be grown. Using the proper soil. — This is a reliable method ofinoculating the soil. Care must be taken not to use soilthat has in it seeds of bad weeds or that contains the germsof serious plant diseases. Promptly cover inoculated seedor soil used for inoculating legumes, for much sunshinewill kill the Fig. 113. — Roots of Soy Bean, NOT inoculated 172 yVGRICULTURE Legumes that need inoculation. — There arc or have been tubercles on nearlyevery cowpea plantfound in the regionwhere cotton plants in theNorth, however, haveno tubercles wherethis crop is but littlegrown. In the South- fi ■^ms^misiwmim ^^ states, where cow- __jj^i ^BKiSilMfe peas are generally grown, the wind hasblown the germs intoalmost every , in mostsandy soils in theSouth, where crimsonclover, vetch, and al-falfa are seldomgrown, the farmerwill need to inoculatethe seed of these threevery useful plants. Figs. Ill, 114 show how inoculation often helps these rarely grown legumes. Exercises. — Ask your parents to tell you how much their cropsare usually increased by a preceding crop of cowpeas or clover. Examine every leguminous plant you can find. Make drawings oftubercles on some of the leguminous plants you find.
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