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Image 87 of Annual report. 1921

Part of Kentucky Agricultural Experiment Station

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Soybeans 29 ml Q me,n,t_st·agtions have developt numerous strains from the intro- lan duced ‘var,iet~ies. Soybean varieties differ greatly in length of US ; time required to mature seed, character of the plant, and size, Of S shape andtiiolor of the seed. The earliest varieties ripen where- E ever? eorirwill ripen while some of the latest require 150 to l'C‘ 200‘=days to mature. Between these extremes all gradations ‘ 3cr. ji are found. The plants of most sorts grow erect and have stout 1`C‘ stems ; some, however, have weak stems and tangle badly. Witli - aw- E a few varieties the stems are more or less twining. The seeds hat ` vary in shape from; almost round to quite fiat. A pound of lim the largest seeded sorts, l\Iammoth for example, contains about . Olll Q 2,000 to 2,500 seeds, while a pound of seed of Peking, a small V€ll _, seeded sort, contains 6,000 to 6,500 seeds. Straw yellow is the mg most common color of ithe seed-coats, but many sorts have black ' ted or brown seed coats and various shades of green are COHIHIOU. ilcr * A few have bicolored seed coats. The germ is green in all Ball ’ green seeded varieties, and yellow in yellow seeded sorts. Black ’ Pm Seeds may have either a green or yellow germ. ` llll$‘ Generally the later maturing varieties grow more vigorously mm : than the early ones, produce larger plants and, consequently, i ll(‘l' { give larger yields, especially of' forage. The difference is par- . llllg tienlarly strikitig on thin land. Wl1ei·e the entire growing . ·. season can be devoted to the erop, varieties should be chosen OPS- e that will occupy most of the growing season. For Kentucky a bill l` Variety for main crop should ripen its seed by October 1. This telic Permits planting wheat or rye after the beans have been har- A >?*tl‘ rested. A variety ripening at this time is also at the proper Gmc { stage for hogging down when the standard varieties of corn gor I ripen so that the two crops can be hogged down together. K Where soybeans are grown for hay the later varieties may be ‘ used but where late planting is necessary, early maturing sorts _. should be selected. wed The number of days required for any variety of soybeans ~lll`C· to ripen seed depends to a considerable extent upon date of lllc lllllllllllg. for late planted beans inature in a sliorter time than G el <`l`1l‘ly planted_ For example, llaberlaudt. planted Nay 1 will YOU` llelléllly ripen only about a week earlier than when planted ·liH1C

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