62 



EFFECT OF PHOSPHATES 



probable that an inadequacy of potash is responsible for the failure 

 of the clover. 



The effect of grazing and continuous cutting on the condition of 

 the botanical flora is well illustrated in Table XXXIV and Fig. 12, 

 which show the percentage of the ground space covered by the flora 

 on the slag plots at Latchingdon and Horndon during 1919. 



TABLE XXXIV. PERCENTAGE OF THE GROUND SPACE OCCUPIED BY 

 THE VEGETATION ON THE BASIC SLAG PLOTS 



AT LATCHINGDON AND HORNDON 

 Determinations made: Aug. and Sept. 1919 



I 



50 



40 



30 



20 



10 



Latchingdon. Cut four Horndon. Cut 1918: 

 years in succession. grazed 1919. 



FIG. 12. Percentage of Ground Space occupied by the Vegetation on the Basic Slag 

 Plots at Latchingdon and Horndon. Season, 1919. Soil London clay. 



The bottom at Latchingdon, it will be seen, is an open one, and 

 although it shows a great improvement in this respect over the un- 

 treated plot, it is not nearly so close as that at Horndon. At 

 Latchingdon the clover disappears in the autumn and come again 

 the following year towards the end of May or the beginning of June. 

 At Horndon on the other hand the surface is covered with a network 

 of clover runners, and there is practically no 'bare space' on the 

 plot. The Essex farmer still holds to the practice of grazing and 

 cutting his meadows in alternate years, and in view of these results 



