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The consideration of fallow is appropriated to a separate di-vision of this chapter, and does not therefore require to bediscussed in this place. It is difficult, to a Scotch farmer atleast, to discover the use which Mr Tull proposed to make offarm dung, which he considered as of no consequence in hissystem, as he no where explains that circumstance; perhapshe meant that it should be devoted to the meadows or hayland, which i 3 its principal employment in many parts ofEngland. It is somewhat singular that the drill system hasbeen extensively adopted in some of the best managed dis-tricts of England in the cultivation of grain, especially ofwheat, barley, and peas, while the broadcast method of sow-ing has been there persisted in for turnips, and even for beans;whereas the modern improved husbandry of Scotland hasuniversally adopted drilling, with wide intervals, in the Culti-vation of turnips, and pretty generally for beans, and has al-most as universally rejected the cultivation of white corn inrows or drills, even after a fair trial; except in some situa-tions where the land is filled with seed weeds, in consequenceof the extensive use of town manure.
§ 1 .Of drilled leguminous crops and roots. —These, parti-cularly turnips, ruta-baga, and beans, or mixed beans andpeas, to which potatoes may be added, can only be cultivatedwith propriety by means of the drill husbandry, in order atthe same time to ensure the best crops of each, which the landis capable of producing, and to do complete justice to the soil,by the extirpation of weeds. Farm land, having drilled cropsof this description interposed at proper intervals, and efficient-ly managed, may be made, in some cases, to carry useful andprofitable crops for a continuance, without the interventionof naked fallow. In other cases, by the same means, the re-currence of naked unproductive fallow, may be postponed orprotracted to considerable intervals, with great propriety;much longer than could be done profitably without the adop-tion of this excellent system. Sandy, gravelly, or free soils,