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dung might be given every fourth year as foon as 

 the turnips are off, to prepare the land for beans and 

 potatoes ; the extra expence of which, fhould it be 

 found neceiTary, would probably be amply repaid 

 by the increafe of quantity. Indeed the benefit 

 would not terminate here ; for as one of your cor- 

 refpondents has, I think, rightly obferved, it is far 

 better to manure for turnips the preceding year, 

 than immediately before fowing them; and I am 

 fure it is for wheat, efpecially if the manure be not 

 thoroughly digefled and become inoffenfive. 



Whether plants from new or old feed are moft 

 fecure from the depredations of the fly, is, perhaps, 

 a queftion, which cannot be eafily determined even 

 by experiments -, for concomitant circumftances are 

 frequently fo much more operative and powerful 

 as to render the difference between them, if there 

 be any, imperceptible. 



It is, however, in the knowledge of every prac- 

 tical man, that new feed fprouts or vegetates feveral 

 days before old, and I think more vigoroufly j and 

 it is equally well known, that the healthy and vi- 

 gorous plants efcape the fly, when the {tinted and 

 fickly feldom or never efcape them. It fhould 

 fcem then, that new feed, ceteris paribus, is more 



lure from the fly than old, and for my own ufe 



would always prefer it. 



That 



