The physiological behavior of regional strains of potatoes
1932
Pieper, J.J.
The results of this experiment indicate that the number of eyes per tuber is greatest for southern strains, but probably has no significance relative to yields when whole tubers are planted. Northern strains of potatoes produce fewer stalks per seed piece than other strains. The area for seed potato production may be determined roughly by planting the tubers from various regions and noting the number of stalks per hill. Small seed pieces produce fewer stalks than whole tubers when planted. Plants resulting from the use of northern seed are more vigorous than those from southern seed. Whole tubers give the largest plants and transverse sections the smallest. The time required for shoots to emerge from the soil is greatest for northern strains and whole tubers and shortest for southern strains and sections of a tuber. Since only strong, vigorous stems produce branches, the branching
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