18 PASTURE STUDIES: SOME RESULTS. 
Dactyhis glomerata. 
The highest percentage obtained by Armstrong for this grass 
was 9:5 on one of the inferior old pastures examined by him (1). 
On another inferior old pasture he found only o-9 per cent., while 
on first-rate old pasture it ranged from o-2 per cent. to 4-5 per 
cent. 
On the best pasture examined by the present writer its P.c. 
fr. was 1-1,% while it was not recorded on some of the best old 
pastures examined. The highest P.c. fr. obtained was 9-5 on a 
four-year-old pasture after a seeding of 8 lb. per acre.? 
The seed of the grass was not included in the seeds-mixtures 
used on the farm on which the present areas are situated until 
1903, but the grass was more or less abundant in a permanent 
hay meadow and along hedgerows up to 700 to 750 feet even 
before this, so that it may be regarded as more or less strongly 
indigenous to situations up to 700 feet. 
The seed was included in the seeds-mixtures for all the 
present areas except Area 8, 
On Areas 1-4 the highest P.c. fr. obtained was 5-5 on Area 1 
at 44 years. It decreased somewhat on this area in the following 
year, but even then it was considerably higher than on Area 2 
(where a lighter seeding had been given) at the corresponding 
date. On Area 2 it decreased fairly rapidly up to 74 years, but it 
still had a P.c. fr. of 0-5 at 104 years. 
On Area 4, it had persisted rather better apparently, but it is 
not known what quantity of seed had been sown on this area. It 
had also persisted better on Area 3 than on Area 2. This may be 
due to the fact that Area 3 had been more thoroughly cleaned 
while under cultivation. 
Although not indigenous to Areas 6 and 7, the grass was 
established on these areas even better than on Areas 1-4. On 
Area 7 especially it had a very high P.c. fr. at 54 years, while on 
Area 6 it appeared to be holding its ground from 4} years to 64 
years. Asinthe case of Loum perenne, however, it decreased 
1 Anglesey, 200 feet, 18 years. 
2 College Farm, Aberystwyth, 400 feet. 
