67 



number) basic slag at the rate of 5 cwt. per acre, and sulphate of 

 potash 1 cwt. per acre, were given on October 14th, 1921, and 

 tares and mustard again sown. These did not come to much, and 

 so the land was cleaned and green crops again put in on June 28th, 

 1922, when they grew much better; the mustard was ploughed in 

 August 2(Sth and the tares October 16th, wheat then being drilled 

 over the whole area. 



5. Malting Barley Experiments. 

 Experiments were carried out, in conjunction with Rothamsted 

 and other centres, on the influence on yield and quality produced 

 with barley by different manures and combinations of these. The 

 variety of barley supplied was "Plumage Archer." 



(a) Warren Field. 



The field selected at Woburn was the heaviest one on the farm, 

 the soil being a fairly heaxy sandy loam, just on the junction of 

 the Lower Greensand and Oxford Clay formations. Previously 

 the land had grown a crop of mangolds which had had <S tons per 

 acre of farmyard manure. Five plots of |-acre each were marked 

 out, and barley — at the rate of 10 pecks per acre — was drilled on 

 April 19th, 1922. Mineral manures were applied at the time of 

 sowing the seed, in accordance with the plan given below, the 

 nitrogenous top-dressings being applied later, viz., on June 20th. 



The crops grew well and showed but small differences until 

 nearing har\est, when, owing to the unfavourable weather, they 

 got somewhat "laid," and ripening was much retJirded. Plot 2 

 (complete artificials) was the least "laid," and plots 3 (no nitrogen) 

 and 4 (no potash) were rather before the others in ripening. 



The crops were cv\t September 9th, 1922, and threshed 

 January 24th, 1923. 



The results are given in llie following table : — 



Maltitio^ Ihii'lcy F.xpi'i'inicnis (Warren Field), 1932. 



Pr>)(liic(' of Barlf'V per ;icro, nflor M;iii,;^o1(ls (niaiuirod) . 



The differences between the plots were but small, and, the un- 

 manured produce itself reaching 42^ bushels per acre, showed that 

 the land was a good deal richer than had been expected, and that 

 it really needed no more manuring. 



