26 PASTURE STUDIES: SOME RESULTS. 
The soil conditions on all four areas are very similar, but the 
treatment of the land and the seeds-mixtures were different. It is 
difficult to estimate the influence of the seeds-mixture on the 
development of the grass. In habit, the grass most closely 
resembles Lohum perenne, but the results for the two grasses are 
not complementary, although on Area 2 itself, they were very 
nearly so. The total for the two grasses on the other areas differ 
considerably from those for Area 2. 
The difference in the treatment of Areas 1, 2 and 3 has 
already been referred to, but how this could effect the difference 
is not at all clear. The grass is not included by Stapledon in his 
list of arable land weeds, and therefore, presumably, it does not 
persist bodily through a period of cultivation. This would also 
be expected from its caespitose habit. 
It has been mentioned that the grass was very plentiful in the 
hay crop taken from Area 2 in 1905. As the hay was mown late 
in the season it is probable that a large quantity of seed was shed 
in harvesting, and would be ploughed in in the following winter. 
It is not known how prevalent the grass may be on land investi- 
gated for dormant seeds by Brenchley (3), but it is not mentioned 
by her as having been produced from dormant seeds, so that 
there is no direct evidence to show that the seeds of the grass are 
capable of lying dormant in the soil for any appreciable length of 
time. At the same time, this is strongly suggested by the present 
results. 
Another factor which may have had considerable effect is the 
presence of uncultivable land adjoining Areas 2 and 4. The grass 
is fairly abundant in the more open spaces of this land, which 
would therefore afford a convenient centre of seed distribution. 
Area 2 lies between this uncultivable land and Areas 1 and 3, but 
the grass is also fairly abundant on hedge banks surrounding these 
ateas. The seeds are apparently quite unsuited to wind distribu- 
1(17) Table I. 
In a few experiments of a similar kind conducted by the writer, no plants 
of this grass were obtained, although the soil was taken from land where the 
grass is abundant, ‘ 
