18 



1 POOR GRASS LAND: 11 CWT. HAY ONLY PER ACRE. 



1922 

 Cwt. per Acre. 



Control . 10.9 



Open hearth slag, 90% soluble . . . 16.5 



,, 30% soluble . . . 18.7 



Gafsa phosphate ...... 18.8 



IL BETTER GRASS LAND: 1-U TONS HAY PER ACRE.* 



Yield of Hay 

 cwt. per acre 



Live weight increase i 

 Sheep, lb. per acre 



* The slags used on the grazing land were not identical with those used on the hay land, 

 but they were of similar types. 



Inspection shows that the amount of clover is highest on 

 Bessemer slag plots. There is less on the high soluble open 

 hearth slag, still less on the low soluble slag and Gafsa plots, and 

 least of all on the unmanured. The effects are beginning to show 

 in the live weight increases. 



THE POTASSIC FERTILISERS. 



A beginning has been made with a test of the new potassic 

 fertilisers, especially on the potato crop. 



In 1921 the crop yields were very poor, owing to the drought; 

 the advantage of potash showed, however, in keeping the plants 

 alive some time after those on the "no potash" plots had died. 

 In 1922 the yields were much better ; the chloride gave practically 

 the same yield as the sulphate. When, however, salt was present 

 in addition to the chloride there was a drop in yield, especially 

 where no dung was supplied. Taking the yields with potassium 

 sulphate as the standard, the results were, for the potato crop : — 



The experiments are being continued. 



