How crops growA treatise on the chemical composition, structure, and life of the plant, for all students of agriculture .. . ects to carry pollen to their are many Orchids. Artificial Fecundation has beenproposed by Hooibrenk, in Belgium, ^^- ^^• as a means of increasing the yield of certain crops. Hooi-brenks plan of agitating the heads of grain at the timewhen the poUen is ripe, in order to ensure its distribution,which is done by two men traversing the field carrying arope between them so as to lightly brush over the heads,appears to have been found very useful in some cases,th
How crops growA treatise on the chemical composition, structure, and life of the plant, for all students of agriculture .. . ects to carry pollen to their are many Orchids. Artificial Fecundation has beenproposed by Hooibrenk, in Belgium, ^^- ^^• as a means of increasing the yield of certain crops. Hooi-brenks plan of agitating the heads of grain at the timewhen the poUen is ripe, in order to ensure its distribution,which is done by two men traversing the field carrying arope between them so as to lightly brush over the heads,appears to have been found very useful in some cases,though in many trials no good effects have followed itsapplication. We must therefore conclude that agitationby the winds and the good offices of insects commonlyrender artificial assistance in the fecundating process en-tirely superfluous. Hybridizing!—^As the union of the sexes of differentkinds of animals sometimes results in the birth of a hybrid,so among plants, the ovules of one kind may be fertilizedby the pollen of another, and the seed thus developed, inits growth, produces a hybrid plant. In both the animal. 296 HOW CROPS GEOW. and vegetable kingdoms the limits within which hyhridiza-tion is possible appear to be very narrow. It is only be-tween closely allied species that fecundation can take , oats, and barley, show no tendency to mix ; thepollen of one of these similar plants being incapable offertilizing the ovules of the others. In flower and fruit-culture, hybridization is practised orattempted, as a means of producing new kinds. Thus thecelebrated Rogers Seedling Grapes are believed to be hy-brids between the European grape, Yitis vinifera, andthe allied but distinct Vitis labrusca, of North America. Hybridization between plants is effected, if at all, byremoving from the flower of one kind, the stamens beforethey shed their pollen, and dusting the summit of the pistilwith pollen from another kind. The mixing of different varieties, as commonly hap
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectagricul, bookyear1868
