The Woburn Field Experiments , 1908. 351 
The Canadian variety has now, for the third year in 
succession, given considerably the highest yield ; the Provence 
variety, as in 1907, was somewhat better than the American, 
though this was not the case in 190G. 
Seed direct from the Argentine having been offered by the 
Agricultural Department there, and sent over, three different 
kinds of Argentine lucerne were sown on small plots by the 
side of the older plots just described. These varieties were 
known respectively as “ Chubut,” “ Buenos Ayres,” and “ La 
Pampa.” The seed was sown on June 4, 1908, and the crops 
grew quite well until the end of September, when they were, 
without exception, attacked by a fungus, Pseudopeziza Trifolii , 
which quickly spread all over the plot and began to invade the 
adjoining older plots. It was therefore necessary to cut them 
at once, very close to the ground, to remove all diseased leaves, 
and to spread lime over each plot, in order to prevent, if 
possible, the disease being carried on to the next season’s crop. 
The weights of green produce obtained were : — 
Chubut ” 
Green produce per acre. 
C. q. lb. 
9 1 4 
Buenos Ayres ” . 
La Pampa ” 
11 
0 3 
. 13 
3 20 
Inoculation Experiments with “ Nitro-Bacterine.” 
Professor W. B. Bottomley, of King’s College, London, 
having kindly placed at my disposal some of the inoculating 
material — nitro-bacterine — prepared by him, it was decided 
to carry out experiments on its efficiency, both with white 
clover and lucerne. The white clover was of two varieties, 
ordinary Dutch White and a new variety, “ Mammoth White.” 
The lucerne was seed obtained direct from the Argentine, and 
this was sown on the plots which had for several years pre- 
viously been used for manurial experiments on lucerne. Each 
plot was divided into two halves, these being kept separate by 
boards driven down into the ground. On one half the seed 
was sown without preparation, while on the other half the 
seed was first treated with “ nitro-bacterine ” in strict accord- 
ance with the directions given by Professor Bottomley. The 
crops came up well ; in the case of the clovers there was little 
difference to be noted between the inoculated and non- 
inoculated halves, but in the case of the lucerne the non- 
inoculated looked the better throughout. In September there 
came over the Argentine lucerne the fungoid attack already 
spoken of, but this did not spread to the white clover. The 
results, in green produce per acre, are given in Table XII , 
page 352. 
