14 PASTURE STUDIES: SOME RESULTS. 
land. No part of Area 2, in which the unsown grasses were most 
prominent, was under a cleaning crop while under cultivation ; 
Area 1 was partly under a cleaning crop, while Area 3 was entirely 
under sucha crop. Areas 1 and 3 were not examined at corres- 
ponding ages, and it is possible that the unsown grasses had 
increased rapidly on Area 3. It may be borne in mind, however, 
that Area r was dressed with farmyard manure after it was laid 
down to grass. 
In spite of the fact that Area 6 had not been under a clean- 
ing crop, the percentage of unsown grasses was exceedingly low 
up to 64 years. In the following year they increased rapidly, but 
this was probably due to (a) change in the method of grazing, (4) 
a period of drought (see p. 8). At 74 years, however, these 
grasses were very much less developed on Area 6 than on Area 7 
even at 54 years. The increase on the latter area at 64 years was 
probably due to the same cause as the increase on Area 6 at 7} 
years. 
LEGUMINOSAE. 
The results for Areas 1 and 2 in respect of sown leguminous 
plants differ very markedly. Other peculiar features of the results 
are, the sudden changes both on Areas 2 and 6, and the difference 
between Area 4 and all the others, but as this is a question 
mainly of Zrifotium repens, these features are better pursued 
when the individual species are discussed. 
OTHER ORDERS. 
The seeds of some plants belonging to other Natural Orders 
were included in the seeds-mixtures for some of the areas. The 
P.c, fr. results obtained for these plants are almost negligible, so 
they will be considered under the various species. 
The aggregate results for the unsown species do not show 
any regular sequence. The most marked feature is the difference 
between the area groups, 1-4 and 6-8. The results for Area 8 
show that in the old grass-heath the miscellaneous plants formed 
as high a proportion of the herbage as on Areas 1-4, but on Areas 
1 See under ‘‘ Individual Species,” p. 15 ef seg. 
