HEAVY SEEDS. 107 
Although a biennial, it is so free in reproducing itself that 
it amounts to a perennial, and under favourable circumstances. 
will produce two good crops, if the first is cut when young. 
For mending indifferent layers it is one of the best’ plants. 
extant. This was recently exemplified to us in 1893, when we 
renovated part of a field consisting of mixed soil on which the 
ley had been entirely burnt up, by sowing 2 lb. per acre of 
yellow suckling early in September. The wet summer of 1894 
favoured it, and we obtained two enormous crops from that 
part of the field we had treated as above mentioned, whilst the 
remainder proved a complete failure. 
The seed requires well ripening and harvesting, when; 
like clover, it will retain its germinating powers for several 
years. In wet summers it is most difficult to get seed that has 
good germinating power, hence only the best samples should be 
bought. Sown sometimes in the spring, but more often in 
August, it is not harvested until the following July. 
With all trefoil mixtures we would recommend the addition 
of 1 lb. to 2 Ib. per acre of suckling. When growing it is 
often mistaken for trefoil, although its habits are. entirely: 
different, and it spreads and tillers, under favourable circum- 
stances, to such an extent, that only one-fourth the quantity of 
seed is required to produce similar results to trefoil. 
We have seen suckling growing on the gravel ballast of 
railway embankments, and on pure black peat, but it seems to 
be a lover of moisture and of moist bottoms. 
A bushel of the seed weighs about 65 1b, each pound con- 
taining on an average three quarters of a million of germinating 
seeds. 
TREFOIL (MEDICAGO LUPULINA). 
Next to clover, trefoil is the most known, the most used} 
and the most popular of heavy seeds, but we would venture to 
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