Winter Survival of Pea (Pisum sativum L.) Lines and Cultivars Grown with Flat Culture and Raised Beds1

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Abstract
The winter survival of 10 pea cultivars of differing cold hardiness was studied under ground-level culture and on raised beds in moist semi-maritime conditions (CorvaUis, Oregon) and in more severe continental conditions (Weston, Oregon). There was survival in 7 cultivars at CorvaUis and 6 at Weston. Planting on raised beds at Corvallis significantly increased survival. This effect was consistent for all cultivars having appreciable survival rates. At Weston, the mean survival was higher on ground level plantings, but cultivars, responded differently to cultural systems. Of the 6 surviving cultivars, only the 2 least hardy had significantly higher survival on ground level plantings.

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