PREVENTION OF SUPPLY DISCONTINUITY BY TIMING OF SOWING WITH SOME SALAD CROPS

S. Avsic, M. Cerne
The consumption of salad vegetables (i. e. lettuce, endive and chicory) in Yugoslavia varies considerably as regards quantity and quality of the crop from season to season. Owing to the variety of climatic conditions in different parts of the country it would be possible to grow various salad vegetables in the open throughout the year. In spite of this, from July to November the only important kind of salad available is endive. The supply of salad vegetables for each month of the year on the territory of the Republic of Slovenia is as follows:

From January to April the market is supplied with endive from Dalmatia (region along the Adriatic coast), with forced chicory and partly with corn salad.

During April and May the market is supplied with soft- and crisp leaved lettuces - likewise from the southern parts of the country - and with loose head lettuce and chicory grown in the open from roots from Slovenia.

In the second half of May and during June matures the crisp leaved lettuce grown in Slovenia.

From July to October the market is supplied with endive, and during November and December, besides endive, one can buy also Pan di zucchero variety of chicory and, in December, also forced chicory.

A part of the supply is imported from Italy. But owing to a rising percentage of urban population, esp. in Slovenia, the question of quality and not only quantity of the supplied crops is becoming prominent. Therefore, the question we were trying to answer with the experiments that are described in this paper is this: What is the best way of supplying continuously the market as regards both quality and quantity. This inquiry cannot be regarded as conclusive, however, since the fluctuations of prices and the exact amounts of demanded quantities that vary from season to season have not been taken into account.

Before describing and evaluating the experiments, it is necessary to mention some consumer habits of our population. These of course are conditioning which kinds and what varieties of salad vegetables will be grown, and they differ from the habits of the population of more developed countries. They are the following:

During summer and autumn the demand is for crisp leaved lettuce, the demand for soft leaved lettuce is only in early spring.

Among the varieties of chicory the red leaved forced chicory is given preference, whereas the Witloof variety is less known and established.

When choosing the varieties for our experiment, and the timing for their sowing, we were of course taking into account the above-mentioned

Avsic, S. and Cerne, M. (1973). PREVENTION OF SUPPLY DISCONTINUITY BY TIMING OF SOWING WITH SOME SALAD CROPS. Acta Hortic. 27, 77-90
DOI: 10.17660/ActaHortic.1973.27.8
https://doi.org/10.17660/ActaHortic.1973.27.8

Acta Horticulturae