34 PASTURE STUDIES: SOME RESULTS. 
ment is due to recolonisation by the indigenous variety, but this 
has not been proved.’ 
The plant is probably completely exotic to Areas 6-8, 
“ Cowgrass” was sown on Area 6 and on Area 7 at the rate of 
alb, per acre, and on the latter area 2lb. per acre “ Late-flowering 
Red Clover ” seed was also sown. 
On Area 6, the plant was recorded in the P.c. fr. examina- 
tions at 44 and at 51 years, but its development was very small, 
as at 54 years it had only a Sp. fr. of 2. On Area 7, however, it 
hada Sp. fr. of ro at 4$ years, so that in this situation, either 
owing to the conditions or treatment or owing to the difference in 
the varieties of seeds sown, it has persisted to a greater extent than 
on Area 1, 
Trifolium hybridum. 
This plant is not indigenous to any of the areas, but its seed 
was included in the seeds-mixtures for all except Area 8 and 
possibly Area 4. 
The results obtained show that its persisting powers are 
generally small under some conditions. It was not recorded on 
Areas 1-4 by the P.c. fr. method, and only to the extent of a 
Sp. fr. of 2 on Area 1 at 34 years by the other method. 
On Area 7 it was not recorded by either method, but on 
Area 6 it was much more successful, as on the latter area it was 
recorded by the P.c. fr. method at 44, 5 and 64 years, but not 
at 74 years, and it also had a Sp. fr. of 15 at 54 years. 
On Area 6, the plant did remarkably well throughout. It 
produced a relatively large amount of herbage up to the fourth 
year, but no determinations were made before 44 years. In the 
third summer it produced ripe seeds quite freely in tufts surround- 
ing cattle droppings, and it is possible that its relatively long 
persistence on this area is largely due to this. In whatever way 
it did persist, it did so on this area to a much greater extent than 
Trofolium pratense, but on Area 7 it was much less successful than 
the latter plant. 
1On anold pasture field on the farm, a remarkable development of the 
indigenous variety followed the application of Basic Slag. 
