ZESZYT Nr 1/ 2009 Abstrakty Volume No. 1/2009 Abstracts |
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| 11. The economic effectiveness of
early potato production depending on the kind of cover - Wanda Wadas and Marek Sawicki Abstract. The economic effectiveness of perforated foil and polypropylene fi bre covers over different periods of plant covering (for 2 and 3 weeks after plant emergence) in early potato produc- tion was estimated. The method of incomplete calculations and marginal costs calculation were used. The economic effectiveness of production was estimated on the basis of the profi tability index calculated as the ratio of yield value to direct costs. Marginal effectiveness of production under covers was calculated as the ratio of increase in production value to increase in direct costs. The profi tability index of early potato production ranged from 87.2 to 387.8% in the cultivation without covers, and from 206.6 to 359.7% in the cover-protected cultivation, depending on the year and cultivar. It was more effective to increase expenditure on production by an application of the covers under unfavourable thermal conditions in the fi rst period of potato growth. It was more effective to increase inputs to perforated foil-protected production. Every additional 1 PLN increased the production value by 1.75 to 9.45 PLN, depending on the year and cultivar. The index of marginal effectiveness of perforated foil-protected production was over twice as high, and in the year favourable to cultivation of early potatoes it was almost the same as the index associated with polypropylene fi bre-protected cultivation. The economic effectiveness of Aksamitka and Cykada production under covers was higher when plants were covered for 3 and 2 weeks after emergence, respectively. key words: early potatoes, covers, economic effectiveness |