106 



LIME REQUIREMENT OF THE SOIL 



growth of clover, a pronounced improvement in this respect will 

 follow the application of such a dressing. 



Throughout the whole of the 1920 season the plots were examined 

 carefully every week. At Tysea Hill clovers were practically absent 

 from the limed and unlimed portions of the plots, and it was quite 

 obvious that some other factor than lime and phosphates was pre- 

 venting the development of clovers. 



At Martin's Hearne there was a good bottom of clover on all the 

 plots although it was not so good as in 1918 (see Plate IV), and no 

 improvement in this respect was evident on those portions receiving 

 a dressing of lime. 



TABLE LIV. BOTANICAL ANALYSIS OF THE HAY ON LIMED AND 

 UNLIMED PLOTS AT TYSEA HILL AND MARTIN'S HEABNE 



TYSEA HILL 



MARTIN'S HEARNE 



Per cent, of Clovers in the Hay by weight 



* Mostly purple vetch and bird's-foot trefoil. Less than 3 % clovers. 



These observations were fully borne out by the botanical analysis 

 of the hay at both centres on the unlimed and limed portions of the 

 various plots. The figures are given in Table LIV. 



Whether the application of lime will enable the clovers to maintain 

 their position at Martin's Hearne remains to be seen. If they fail in 

 a dry season as was the case in 1919, then clearly some other essential, 

 probably potash, is the factor limiting their growth. 



There can be little doubt that at Tysea Hill no further improve- 



