308 
Nigeria, where I knew the nuts must grow well, and had to make 
the best of it. I tried all sorts of ideas, but mainly kept my eyes 
open for a field clue. I got this indirectly when trying to solve 
a rather similar cotton (native type) problem. Up to 1914 our 
highest yield of groundnuts as harvested amounted to just over 
Ibs. per acre, which would probably have weighed about 
300 to 400 lbs. when dry (unshelled nuts). We had many worse 
than that, that wouldn’t bear recording, down to 11 lbs. per acre! 
Now normally we get from 1,000 to 1,300 lbs. of well dried nuts 
per acre (equivalent to about a ton as harvested). With the aid 
of lime I secured 1,700 tbs. once, but the liming had nothing to 
do with disease. In a ten-acre field one cannot see a ‘“‘ bunched ”’ 
on the underside, and freak in the most extraordinary way. 
Flowering is greatly reduced, and, of course, bolling. The 
tion. Native plants near the coast, where the humidity average 
is much higher, grow normally. The key to the problem lay in 
the fact that the Americans were upland cottons. Their hirsute- 
; at oe fee 
a soil temperature suai the period immediately after it infects 
its host, or perhaps even 
i J 
gut serial plantings of clover varieties, both in England and 
Scotland? Tn the north of Scotland at least the dea doesn’t 
phot There may Some factor inhibiting out-of-season 
N “ion, either planting custom or meteorological. 
an Of The will see what I mean by field physiology. I doubt if 
a + ken problems I have mentioned co d have been solved 
in a laboratory, or at any rate only with the utmost difficulty 
