We notice, says the Ohio Farmer, that manuring upon the surface, broadcast, after plowing and before harrowing, lias become much more a favorito practico with farmers thau forraerly. Tlie old impressious that the boIuable matters would rise, if plowed in deep, and that decomposition would also be hastened by burying dcep, have been pretty generally dissipated, under a better knowkdge, and a inore observant practice than that of forty yoars ago. If manuros are green, long, and fresh froin the bain yard, it is doubtlews policy to bury thembeneath the soil, if it is absolutely necessary to use them at that time, but we shoukl prefer planting less quantity of land, manuriug what we eould with well ripenod manure, and pilinp; up the green, fresh manure with a good sprinkling of piaster, and let it ferment and rot a few weeks. We believe practico has sliowu moro immediate returns of crops froin niauires spread upon the surface, or, at best, but slightly covered, thau wlien otherwise employed, The rains tend more to wash soluble matter downward, where the roots can get it, than the gaseous qualities will cause to send upward; but, in agrieultural pcactice, it takes many exporiuients, and long and repeatud trials of the same,ore it is safe to fully eondenin any ono practico, to the benefit of another. We have grown some of our best crops of corn with long mauuro, plowed under deeply, and yet we should prefer not to risk the practice, when conveniunt to do otherwiso.