. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . t from every other ear,there can never be a large number of such , this very fact of wide variation makes theimprovement of varieties possible. If there was novariation from which selection could be made, therecould be no improvement. It is by selecting thoseears which vary in the direction desired and discardingthe poor ears th
. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . t from every other ear,there can never be a large number of such , this very fact of wide variation makes theimprovement of varieties possible. If there was novariation from which selection could be made, therecould be no improvement. It is by selecting thoseears which vary in the direction desired and discardingthe poor ears that a general advance can be made. The stock seed is the corn one generation removedfrom the highly-bred seed. The corn breeder willconcentrate his main effort in the production of highly-bred seed. From this seed large quantities of stockseed may be grown and sold to the farmers. This 60 THE BOOK OF CORN seed possesses nearly all the good points of thehighly-bred seed, and differs only in the fact thatindividual selection by the corn breeder has kind of seed can be produced in large quantitiesand can be sold at a moderate price. No farmer,however, can afford to depend on imported seed forthe main part of his crop. Seed corn imported from. Cross-bred Self-fertilized Fig 18—Effect of Inbreeding Small stalks inbred; large stalks cross-bred a distance and especially from a different latitudeseldom gives satisfactory results the first two or threeyears, even though the seed may be of the best, whichoftentimes is not the case. It is well known thatmost of the seed corn put on the market by seedsmenis bought of farmers in crib lots, shelled, screened and BREEDING AND SELECTION 6l sacked, ready for sale, little or no attention being paidto the selection; in fact, it is generally handled witha scoop shovel and is known as the scoop shovelmethod of selection. The chances are that thefarmer has in his own crib better corn than that whichhe purchases from seedsmen at four or
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