Ch. VIII.] ON SOILS AND COURSES OF CROPPING, 125 



By which course the land woukl gain six degrees of fertility in nine years, 

 provided the manure was of the average quality produced chiefly by the 

 dung of well-fed cattle ; but being essentially composed of straw, it pro- 

 bably would not occasion any amendment. 



Crops and Manure. 



9 lo.ids of dung 

 Potatoes *, 80 scheff. 

 Barley, 9 do. 



Peas . 



Sj loads of manure 

 Rye, 8 scheff. 

 Clover, mown 

 Pasture 

 Oats, 11 scheff. 



ALTERNATE SYSTEJ[. 



Fecundity. 



169ideg. 139 deg. 



This course would therefore augment the fertility of the ground by 30i 

 degrees within eight years, besides producing crops of superior value ; a 

 result which is entirely due to the additional quantity, as well as the supe- 

 rior quality of the dung made by cattle fed upon roots and clover ; and 

 which, if extended to a few more years in pasture, with the advantage 

 of either a folding crop or the adoption of soiling, would in time bring the 

 land into a state fit for the production of wheat. There can, indeed, be no 

 doubt that it must be progressively improved by the production of good 

 crops; for the better they are, the more dung will be furnished by the 

 stock. Thus if clover grown upon land of 60 degrees of fecundity will 

 ameliorate it to the extent of 10 degrees, if sown on a soil equal to 80 de- 

 grees its effect will be increased to 14, and so on in proportion. This will 

 be rendered still more apparent by the following summary of four different 

 rotations actually carried into effect, and each consisting of 120 journals, 

 or £=■ 76* 1*6^ acres English, and bearing the crops here mentioned, after 

 deduction of the seed. 



No. 2. 



Oats, upon pasture ley . . . 12 scheff. 



Fallow, dunged ... „ 



Rye .... 10 



Barley .... 10 



Rye . . . . . 5 



Clover, once mown ... 20 cent. 

 Ditto, pastured during four years together with 100 



journals of extra pasture meadow, dunged . 15 



* The augmentation of fertility is here added, because of the culture bestowed upon 

 the potatoes as a fallow crop ; its diminution is carried to the account of the production 

 of the crop, which is supposed to require a quantity of manure equal to 30 degrees for 

 its support. 



