68 



EXPERIMENTS IN SUBSOILING. 



Plot. 



Potatoes. Great Knott Wood Field, 1916. 



All plots received per Acre : Dung, 10 tons 



Superphosphate, 2 cwt. 

 Bone Flour. 2 J cwt. 

 Sulphate of Ammonia, I cwt. 



f Not subsoiled 



- j- Subsoiled for this crop .. 



"M 



Weight of 



produce per 



Acre. 



Tons. 

 500 



454 

 527 

 5 50 



Great Harpenden Field. 



' I ' ! '' i ! i 



j Dressed Grain per I: I 



Acre ... Bus. 120 3 19 4 164 ! 305 309 293 I 



Weight per Bus. lb. ' 62 6r8 . 613 i' 429 ! 436 438 j 



190 

 585 



Straw per Acre cwt. \ 20 8 18 8 212 i] 209 | 211 \ 230 |j 162 

 Total produce per ' ji 



Acre ... lb. I 3775 3478 3541 !l 3808 



215 

 59- 1 



179 



Not 



sub- ■/ \ 



soiled i<"^^> 



69 



Dressed Grain per 

 Acre ... Bus. 



Weight per Bus. lb. 



Straw per Acre cwt. 



Total produce per 

 Acre ... lb. 



3863 1 4075 i 3123 3450 



294 

 422 

 205 



3661 



55-3 

 450 



222 

 597 



19 1 



588 



195 ! 179 ! 159 



3850 i 3539 ' 3079 i 



^ L i 



Wheat after Fallow (without Manure, 1851, and since^ 

 Hoos Field, 1915, 1916 and 1917. 



