Naslov
Calculator for the Brassicas fertilization recommendation

Autori
Lončarić, Zdenko ; Vukadinović, Vladimir ; Bertić, Blaženka ; Teklić, Tihana

Izvornik
Acta Horticulturae (0567-7572) 627 (2003); 153-160

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cabbage ; Savoy cabbage ; cauliflower ; nutrient removal ; nitrogen ; phosphorus ; potassium ; crop residues ; model ; calculator

Sažetak
The calculator for the calculation of fertilizer doses required for the Brassicas crops is based on the results of the soil analyses data and nutrients removal by yield of cabbage, Savoy cabbage and cauliflower. The formulas included in the fertilization calculation in this calculator are written in JavaScript so that they can be copied and used "off line". Calculator includes introductory part with instruction and part for choice of Brassicas vegetable species. For the estimation of the fertilizer recomendation it is necessary to select the crop and the target yield. Furthermore, the rusults of soil analyses should be entered (pH, humus content, P, K and Nmin), than the soil texture (light, medium, heavy)should be selected and the amount and year of the manure application should be entered. Also, the vegetable species depended data are plant density, number of planed top dressings, what inflences on fertilizer requirement and time of application. Data used in formulas are results of four-years experiments since 1998. and are related to soil and fertilization influence on yield, nutrient concentration and nutrient removal of cabbage, Savoy cabbage and cauliflower plants. The results of calculation is the recommendation of N, P and K doses for the fertilization of selected vegetable crop. The calculator estimate the amount of certain mineral fertilizers at the same time. The calculated NPK fertilizers amount is the compromise between the requirements of phosphorus and potassium, while the nitrogen fertilization and its distribution are recommended according to crop requirements, soil texture and estimated mineralisation dynamics. The descripted calculator can be found and used on the Internet.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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