Naslov
Computer System for Fertilizer Recommendation and Economic analyses of Field Vegetable Ecological Production in Croatia

Autori
Lončarić, Zdenko ; Lončarić, Ružica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Towards ecologically sound fertilisation strategies for field vegetable production / - Firenza : München : Societa Orticola Italiana -Firenze, 2004, 36-37

Skup
ISHS Symposium: Towards ecologically sound fertilisation strategies for field vegetable production

Mjesto i datum
Perugia, Italija, 07.06.2004. - 10.06.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
decision support system; organic farming; fertilization; costs analysis; profitability

Sažetak
Increasing of organic farming all over the world influenced on Croatian agriculture and under the existing laws and regulations the organic farming includes previous and continued analyses of soil and fertilizer quality and contamination. In 2003 a 62 farmers and in 2004 a new 68 are registered as organic farmers in Croatia and this computer system for fertilizer recommendation and economic analyses of field vegetable organic production is created to help them in educational, advisory, prediction and analytical way. The computer program is created according to the existing laws and regulations, using results of several field vegetables fertilization experiments and results of economic analysis of field vegetable production in eastern Croatia. The computer program is composed of three major parts: testing of soil suitability for organic farming, calculating fertilizer recommendations and economic analysis. The soil suitability testing is based on concentration of harmful or toxic components in aqua regia extracts of soil. The humus content has just an advisory note: it is recommended that humus content is higher than 2%. Fertilizer recommendations is based on nutrient removal, soil analyses and fertilizer allowed in organic farming according to law. Expected and achieved yields in organic farming are lower than in conventional farming and the nitrogen amount applied by organic fertilizer is limited on 170 kg ha-1, therefore nitrogen availability is used for target yield limitations. The third part of the program is simplified economic analyses of field vegetable organic farming. All the amounts, prices or costs structure changes are allowed. Thus, it's very simple to compare different production conditions and to analyze economic importance of soil fertility, production investments, prices or any other factor. The organic farmers in Croatia shows a great interest for any help in education and advising, but at the moment they aren’ t ready enough to cooperate completely.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA