YIELD AND STRENGTH 173 



in estimating the possibilities of yield. Later on 

 the yield of grain from each plot is ascertained 

 and a simple calculation enables one to compare 

 all the varieties under trial. The margin of error 

 rarely exceeds two per cent, and under favourable 

 conditions it is considerably less. The data so 

 obtained together with the more inaccurate but at 

 the same time highly essential personal judgments 

 as to the suitability of the varieties for general 

 cultivation enable one to decide whether tests on 

 the wholesale scale are desirable. 



Up to the present only one variety showing 

 the combination of yield and strength has been 

 tested on the commercial scale. This is one known 

 as Burgoyne's Fife, the name commemorating the 

 fact that it was raised on the Burgoyne's farm 

 lent to the University Department of Agriculture 

 by Mr W. A. Macfarlane Grieve of Impington. 

 It was one of the many forms isolated from the 

 cross between Rough Chaff (an old English wheat 

 rarely grown now) and Red Fife already described. 

 The Red Fife parent was chosen at hazard from a 

 small crop grown from ordinary commercial seed 

 at a time when it was not known that individual 

 plants of Red Fife vary a little in the quality of 

 their grain and we had not isolated the pure lines 

 we now have. In consequence we do not know 

 whether the parent plant possessed the strength 

 of Red Fife at its best. The hybrid does not, 

 but resembles in both the mill and the bakehouse 



