INDIVIDUAL SPECIES. 7 
They also suggest that the decreass is rapid up to the fifth 
year, and that after, there is no definite relationship between the 
amount of seed sown, and the P.c. fr. of the grass, at least where 
not less than 8 lb. per acre is sown. 
Since the grass is exotic to Areas 6 to 8, it is interesting to 
note that after a lighter seeding it had a higher P.c. fr. on Area 6 
than on Area 1 at 44 years. Here, however, there was a greater 
decrease in the following year, and a further decrease in the next 
year. At 74 years its P.c. fr. on Area 6 had fallen to 1-8, but the 
system of grazing had then been changed, and the sudden decrease 
from 64 years to 74 years is probably connected with this, and 
possibly also with the fact that the area suffered rather severely 
from drought during this period. 
With a light seeding (6 Ib. per acre) the grass was but slightly 
represented on Area 7 at 54 years, and it was not recorded on this 
area at 64 years. 
The difference in the amount of seed sown on Areas 6 and 7 
was considerable, but it does not seem alone sufficient to account 
for the difference in the P.c. fr. of the grass on the two areas at 
corresponding periods. 
From the results for Area 6 it is seen, however, that even 
where not indigenous the grass may persist in fair quantity up to 
64 years, and in some quantity up to at least 74 years in spite of 
very heavy grazing with sheep at the end of this period. 
Since the presence of the grass in the pasture was desired, 
these results, (with the possible exception of those for Area 7), 
fully justify the inclusion of the seed in the seeds-mixture, but at 
the same time they show that under these conditions the grass 
does not form a very high proportion of the total herbage after a 
few years, as on Area 1 it was the second most plentiful grass at 
44 years, while on Area 2 at 10} years it had fallen to the seventh 
place, and on Area 6 it had fallen from second place at 4} years 
to sixth place at 7} years. 
1Stapledon, however, found the grass ‘‘wonderfully resistant and 
persistent ” in drought (15). 
