Chap. XVII. Old and New Hufbandry. 27 1 

 getables (a). Superinduclions of Earth are an Addi- 

 tion of more Ground, or changing it, and are more 

 properly purchafing than cultivating. 



of thefe Rows in time become equal : For tho' Ten Plant? that 

 produce an Ounce of Wheat, iniume more Pabulum than one 

 Plant that produces the fame Quantity (the Reafon for which 13 

 given in the Note on p. i 21 ,) ; yet a Plant that produces Six or 

 Seven Drams, infumes lefs than one that produces an Ounce ; for 

 a Plant which produces Six Drams of Wheat cannot be a poor 

 one, and therefore infumes no more Pabulum than in proportion 

 to its Augment and Product. Thus the Soil of thole Ends, 

 which, by being doubly exhaufted by Weeds and Wheat plants, 

 was made poorer, gradually recovers an Equality with the other 

 Ends, by being for feveral Years lefs exhaufted than the other 

 Ends are by larger Plants, whilft the Number of Plants, and the 

 Pulveration of each, are equal. 



To the Reafons already given there is another to be added, 

 why Horfe hoed Wheat exhaufts the Soil lefs than fown Crops, 

 where the Product of Wheat produced by each is equal: Which 

 Reafon is, that the former has much lefs Straw than the latter ; 

 as appears by the different Quantities of Grain that a Sheaf of 

 each of equal Diameter yields ; one of the former yielding ge- 

 nerally double to one of the latter ; for a Sheaf of the fown has 

 not only more fmail Under-ears, but alio its belt Ears bear a lefs 

 Proportion to their Straw than the other ; for a Straw of fown 

 Wheat Six Feet high, I have found to have an Ear but of half 

 the Size of an Ear of drilled W r heat on a Stalk Five Feet high, 

 having meafured both of them Handing in the Field, and rubbed 

 out the Grain of them. This Difference I impute to the different 

 Suppiy of Nourilhment at the time when the Ears are forming. 



Thus the fown Crop exhaufts a Soil much more by its greater 

 Quantity of Straw. 



And this is one Reafon why annual Crops of fown Wheat can- 

 not fucceed as Crops of Horfe hoed Wheat do. There mull be 

 Dung and Fallow to repair the Exhauftion of the fown ; neither 

 of which are necefi'ary for Crops of the Horfe -hoed. 



(a) it may be afeed, How 'tis poffible that Eight Hoeings, 

 which are but equal, in Labour, to Two plain Plowings, mould 

 fo much exceed Three plain Plowings, as to procure as good or 

 a better Crop without Manure, than the common Three Plowings 

 can do with Manure, and enrich the Land alio. 



The Anfwer is, That each Hoeing of the Five or Six being 

 done to the Wheat-plants, though it does no: clean plow the 

 whole Interval underneath, yet it changeth the whole external 

 Superficies (or Surface) thereof, whereby it becomes impregnare 



b.- 



