Plant-breeding; comments on the experiments of Nilsson and Burbank . in order toproduce all the seed required for the sowing of the wholefarm. It took three or four years to reach this c[ twenty years of continued selection this ehte strainwas so much improved as to produce a race distinctly richerthan the ordinary varieties of rye in Middle Germany, andslowly but gradually it found its way, first into the surround-ing farms, and afterward over large parts of the this period Rimpau was thereby enabled to sell allhis harvest as seed-grain, obtaining in this way a mos
Plant-breeding; comments on the experiments of Nilsson and Burbank . in order toproduce all the seed required for the sowing of the wholefarm. It took three or four years to reach this c[ twenty years of continued selection this ehte strainwas so much improved as to produce a race distinctly richerthan the ordinary varieties of rye in Middle Germany, andslowly but gradually it found its way, first into the surround-ing farms, and afterward over large parts of the this period Rimpau was thereby enabled to sell allhis harvest as seed-grain, obtaining in this way a most satis-factory recompense for his labors. Shortly afterward therye of Schlanstedt was introduced into France, where itsoon overthrew the local varieties, especially in the de-partments north of Paris. Even there it is ordinarily cul-tivated from original seed, produced directly by Rimpauor multiplied only during some few generations by seed-merchants. For purpose of criticism it is liighly interesting to notehow a French agriculturist, Professor Schribaux of the. Fig. 27. A. Rye of Schlanstedt, produced by WilhelmRimpau, by slow repeated selection. B. Ordinary rve. 97 98 PLANT-BREEDING Institut Agronomifiue of Paris explains the conditions ofkeeping the Schlanstedt rye up to its original qualities. Hesays: In order to do this, care must be taken to sow theseeds on a field which is as far removed as possible from allother cultures of rye. Moreover, the field should be largeand protected all around by a hedge of trees and this precaution the rye of Schlanstedt would soondegenerate through accidental crosses with the local crosses would under any other conditions be unavoid-able and soon wholly deteriorate the race (Almanach duCultivateur 1892, p. 69). From this judgment, given by an authority who has sogreatly contributed to the wealth of northern France bythe introduction of this variety, we may deduce some con-clusions as to the constancy of Rimpa
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