602 



Experiments with Phospha^tes and Slags. [Oct., 



70 

 60 



50 

 40 



30 

 20 

 10 





GopJ GniM 





1 iifcrior Gi-a-o 





Weeds 



1 



I 



I 



A 



[ 



Fig. I). — Botanical Composition of Hay by weight at Maitin's Hcarne, 1919. 



1. Open hearth (fluorspar basic slag. 2. Open hearth (high 

 soluble) basic slasr. 3. Untreated. 4. Gafsa rock phosphate. 

 5. Egyptain rock phosphate, 6. Algerian rock phosphate. 



Clover 

 Grass 



Weeila 

 Bare space 



n60 



50 



40 



30 



20 



10 



13 14 



Fig. 7. — Percentage of Ground Space occupied b}' the Vegetation at Horndon, 



August, 1919. 



1. Florida pebble phosphate. 5. Open hearth (high soluble) basic 

 slag, 6. Untreated. 8, Gafsa phosphate. 12. Egyptian phosphate. 

 13. Superphosphate, heavy dre sing. 14. Superphosphate, light 

 dressing. 15. Superphospate and lime. 16. Untreated. 17, Open 

 hearth (high soluble) basic slag, 18, Open hearth (fluorspar) 

 basic slag. C. Lime, 



During the more favourable season of 1920 clover again made 

 good growth on the phosphate plots and bulked largely in the 

 hay crop. There was quite as much present on the rock phos- 

 phate plots as on the high soluble slag plot. Only a partial 

 analysis of the hay from three of the plots was made. The 

 figures are given in Table 2. 



