RESPONSE TO FARMYARD MANURE 



97 



There is a small gain due to lime at Martin's Hearne, but considering 

 that the 1920 season was a particularly favourable one for the hay 

 crop the result suggests that very little can be expected from lime 

 until some other fertilising constituent is supplied*. The same con- 

 clusion holds true for Tysea Hill, where the increase due to lime is 

 insignificant. In taking the average it is probably not fair to include 



TABLE XLIX. EFFECT OF CROSS DRESSING WITH LIME AT MARTIN'S 

 HEARNE AND TYSEA HILL 



the results from the untreated plots, because it may with reason be 

 argued that no result from the application of lime could be expected 

 until the need for phosphates was first met. If the figures for the 

 untreated plots at Tysea Hill are excluded, the average yield becomes 

 44-1 cwts. per acre on the unlimed plots and 45-0 cwts. per acre on the 

 limed plots, giving an average increase of 0-9 cwt. in favour of lime. 



The response to farmyard manure on Plot A at Martin's Hearne 

 is significant. Assuming that 10 loads of farmyard manure are 

 equivalent to 8 tons, and that the farmyard manure contained -4 % 

 of phosphoric acid and -4 % of potash, this plot received in addition 



* The yields of hay for 1921 show equally poor returns from the use of lime. 



7 



R.B.S. 



