This discussion, then, upon the so-called clover-sickness leads us to adopt the following propositions:—
First. That the larger induced plant of our cultivated clovers has not, as a rule, that perennial constitution of the smaller wild species.
Second. Even its induced habit is much deteriorated by transportation under adverse climatal circumstances.
Third. The seed itself is often full of weeds, which, by gaining the mastery, kill out the young clover plant.
Fourth. This effect is enhanced by growing clover with barley, in which, if not smothered, it must become weakened.
Fifth. We ought not to expect to grow clover where we have taken away the necessary substances for its growth in the corn crop.