70 
Winifred E. Brenchley. 
seeds were sown on April 5th, and the pots were run out into the 
open about May 16th, as soon as the plants were large enough and 
the weather conditions were favourable. The plants were harvested 
on July 20th, and dried and weighed as usual. 
Woburn Soil. 
TOTAL DRY WEIGHTS OF CROPS FROM SIX POTS. 
Crop. 
Weed. 
Grams. 
Papaver 
Papaver + Papaver 
Grams. 
55.95 
63.67 
33.45 
Barley + Papaver 
44.66 
95.72 
Barley ■ 
92.48 
Barley + Barley \ 
33.49 
Barley + Spergula 
58.33 
\ Spergula + Spergula 
116.48 
• Spergula 
98.50 
AVERAGE DRY WEIGHTS OF SHOOTS. 
Crop. 
Weed. 
Per 
plant. 
Per 
single sowing. 
Per single sowing. 
Grams. 
Grams. 
Grams 
Papaver 
9.33 
Papaver+ Papaver 
5.31 
1.39 
5.58 
Barley 
Papaver 
7.44 
3.99 
15.95 
Barley 
1.93 
7.71 
Barley + Barley 
1.40 
5.58 
Barley + Spergula 
9.72 
Spergula + Spergula 
9.71 
Spergula 
16.42 
Barley and Papaver. 
The germination and early growth of all combinations of 
plants were normal and similar, but by the end of six weeks some 
differentiation was apparent. Barley in both single and double 
sowing was well developed, but the total growth with single sowing 
was almost as strong as with the double sowing even at this early 
date. In association with poppy the growth was far less good. As 
time went on these differences were accentuated, and at harvest time 
the double sown individuals were far less strong, possessing weaker 
stems, while the barley sown with poppy was very variable and 
poor. 
