OF SCOTLAND.

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naturally adapted for the growth of this grain. Under goodmanagement, the recurrence of wheat crops, will therefore bemuch seldomer on such soils, than on those already mention-ed ; and at all events summer fallow need never be resortedto for cleaning them, as the turnip culture is perfectly suffi-cient, when properly conducted, for freeing them of weeds,unless where the field is very foul with root weeds, a summerfallow may then be necessary in the first instance. On thesesoils wheat can only be taken with propriety once in a rotation,and may follow the turnip, or, according to the Norfolk sys-tem, the clover crop. When wheat follows the turnip crop, itmust in general be sown in the spring months, unless the tur-nips are drawn and stored, in which case the wheat may besown in November. On sandy turnip soils of a w r cak staple,wheat ought never to be attempted, unless a complete dressingof clay, marl, or alluvial compost has been recently bestowed;in which case their nature or staple may be said to be chan-ged towards loam. On the lighter descriptions of soil, wherecircumstances are favourable in other respects to the growthof wheat, it will in general be the best management, to takewheat after turnips that have been consumed on the land;in which case, it must necessarily be sown in spring, and theearlier the better.

§ 2. Season of sowing .—From what has been already said,the season of sowing wheat must necessarily be regulated bya variety of circumstances, such as the stage of the rotationat which it is cultivated, the quality of the soil, and the na-ture of the season. After fallow, as the season allows, it maybe sown from the end of Aujmst to the middle of November.On wet clays it is proper to sow early if possible, as suchsoils, when thoroughly drenched with moisture in autumn, sel-dom are in a proper state for harrowing till the succeedingspring. In the opinion of many experienced husbandmen,the best season for sowing wheat, either on fallow, rag-fallow,or once ploughed clover stubble, is from the beginning ofSeptember to the 20th of October; but in regard to this par-