Applications of a Model to Predict the Time to Maturity of Calabrese Brassica oleracea

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Abstract
A model that predicts the time from sowing to maturity of calabrese Brassica oleracea cv. Corvet is used to design a sowing schedule to give a series of crops maturing at weekly intervals. The predicted performance of the sowing schedule is evaluated using meteorological data for 14 years recorded at the Scottish Crop Research Institute. In E. Scotland sowings could be made in the second week of April and continued through until the end of June to provide a regular supply of mature calabrese from late July through to early October. There was an increasing risk of crops failing to mature with progressively later sowings in July. Continual updating of forecast of harvest date and intervals between harvests, using the current year's weather combined with long-term average weather, is described. A dynamic sowing plan predicting the best dates to sow, based on these forecasts, reduced the spread in intervals between harvests from 2·5 to 1·8 days.

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