Relation of temperature and moisture to longevity of seed of blue lupine, Lupinus angustifolius, Austrian winter fieldpea, Pisum sativum arvense, and hairy vetch, Vicia villosa
1948
McKee, R. | Musil, A.F.
When pods of blue lupine were straw color and apparently mature the seed still contained 18% moisture. Seed in storage in small samples fluctuated in moisture content with changes in atmospheric humidity and came to equilibrium with the surrounding air quite rapidly. High grade Austrian Winter fieldpea seed in open storage under normal temperature and humidity did not deteriorate as rapidly as lower grade seed. In a high-humidity atmosphere blue lupine and Austrian Winter fieldpea seed absorbed moisture more rapidly at 35 degrees than at 20 degrees C. Seed of blue lupines under high humidity deteriorated more rapidly than did Austrian Winter fieldpea or hairy vetch. Blue lupine seed with constant moisture of 15% showed injury after 4 hours' exposure to a temperature of 55 degrees C (131 degrees F). When the moisture content of the seed was higher, the deterioration was greater and more rapid. Seed of blue lupines, hairy vetch, and Austrian Winter fieldpeas, stored with a moisture content of 15%, deteriorated rapidly when the temperature was 30 degrees C (76 degrees F). Austrian Winter fieldpea and hairy vetch seed with 15% constant moisture, when stored in a temperature of 30 degrees C, deteriorated completely in 20 months, while at 20 degrees C in the same time there was but little deterioration.
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