87 



Swedes, 1924 : Warren Field, Oxford clay. Dung- 12 tons 

 per acre, May 10th-15th. Super i cwt. and 

 Kainit 4 cwt., May 16th, seed drilled 5 lb. 

 per acre, June 23rd. Roots pulled January 1st- 

 23rd, 1925. 



Note. — The swedes and mangolds experiments were sub- 

 jected to heavy rainfall and flooding during May (p. 78). 



The results follow : — 



Although the differences in some cases are small, it appears 

 that for corn the muriate gives a bigger yield than sulphate of 

 ammonia, while the reverse holds for roots. 



7. The Relative Values of Lime and Chalk for Liming Purposes 



(Stackyard Field). Series B. 



1923. 



This experiment — one conducted on the crops of an ordinary 

 4-course rotation — was started in 1919, when 12 plots in Stack- 

 yard Field, each one- sixth of an acre in extent, were set out in 

 two series, the one consisting of plots to which caustic (burnt) 

 lime was given in different quantities, the other of plots which 

 received ground chalk in quantities supplying the same amount 

 of lime (CaO) as given to the corresponding caustic lime plots. 

 There were also two unlimed plots. 



