Abstract:
In previous years, at Corvallis, yields of bush snap beans
varied among planting dates. In order to obtain additional information
on the effect of planting dates on the growth, development and
yield of snap beans, four field plantings and two greenhouse plantings
of the variety O.S.U. 2051 were made.
Results indicated that the late-June and early-July plantings
gave higher yields than the mid-May and early-June plantings. In
the greenhouse, the April planting had a higher yield than the
February planting. The number of flowers per plant increased as
the date of planting was delayed. The number of pods per plant was
the maximum in the early-July planting. High temperatures during
the major part of the flowering period reduced the number of pods
per plant.
The fresh weights and dry weights of the plants were highest
when the planting date was delayed. The number of nodes and height
of the plants increased in the first three field plantings but were
decreased in the last planting.
The data on the heat unit requirements of the different plantings
did not show any close relationship. The later plantings had
higher heat unit requirements.
