Differences of injury by frost to wheat plants grown comparably
1932
Waldron, L.R.
As a result of severe April and May frosts a certain proportion of plants in rows of Hard Federation and F5 hybrid selections were injured. Uninjured and injured plants of the two groups were labeled and sorted at harvest. A study made upon these showed that the injury persisted during the life of the plant with a marked decrease in yield. The injured plants were nearly 10% less in height than the uninjured plants, while the deficiency in the number of fertile culms and in grain per plant was at or near 50%. Injuries of this sort must have an influence upon the yield per acre as any increased growth of the uninjured plants above what would have occurred normally could not compensate for the losses of the injured plants, which would remain as competitors. The value of varieties resistant to frost is evident.
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