66 



green crop and the other half in corn. P^urther, it was decided to 

 limit future enquiry to the two green crops, tares and mustard, 

 both in this field and in Lansome Field, and to omit the third crop, 

 rape. 



Accordingly, after the g-reen crops of 1921 had been fed off by 

 sheep, wheat was sown over the lower 2 acres, and green crops 

 again on the upper 2 acres. Wheat (*'Red Standard") was 

 drilled on October 12th, and winter tares on 1 acre on October 

 12th. Mustard followed on the remaining 1 acre on Mav 27th, 

 1922. 



It was very noticeable that the tares were markedly better on 

 that part of the land where in earlier years (since 1911) rape had 

 been grown, than where tares followed tares ; a like difference was 

 seen on the lower half with the wheat crop, this being better on 

 the strip that had carried rape than where tares had been the crop. 

 This would seem to open a question as to whether the repetition 

 of the tares crop had not had an injurious effect. 



The wheat, following green crops fed on, made little progress, 

 and was a very disappointing crop. It was cut on August 24th, 

 stacked, and threshed December 22nd. 



The results follow. 



Green Manuring Experiment (Stackyard Field). 

 Produce of Wheat per acre, 1922 — after Green Crops. Series A. 



These poor results are quite unaccountable, especially when it 

 is remembered that on land only a few yards off in the same field 

 the unmanured yield after ii) years was higher than here. More- 

 over, not only had very fair green crops been grown in 1921, but 

 these had been fed off by sheep which had H cwts. of cotton cake 

 per acre as well. This opens up a whole series of problems in 

 relation to green manuring, nnd which call for careful investiga- 

 tion. 



The tares on the upper half grew well, were fed off by sheep, 

 in July, 1922, receiving '^ cwt. cotton cake per acre, and then a 

 second crop of tares was grown, this being similarly fed off along 

 with cake in October. Mustard, sown on May 27th, was fed off 

 with cotton cake, a second crop then grown and this likewise fed(^ff. 



(h) Lansome Field. 



Green crops of tares and mustard had been grown on the old 

 plots of this experiment in the summer of 1921, and were ploughed 

 in towards the end of July. The area was then extended by the 

 addition of >) more |-acre plots, one of tares, one of mustard, and 

 the third left as a control plot. To all the plots alike (now f) in 



