Naslov
Decision support system for soybean and other crops fertilizer recommendations

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

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

Izvornik
Abstracts of contributed papers and posters: VII World Soybean Research Conference, IV International Soybean Processing and Utilization Conference, III Congresso Brasileiro de Soja. / Moscardi, Flavio et al. - Londrina : Embrapa, 2004, 337---

Skup
VII World Soybean Research Conference, IV International Soybean Processing and Utilization Conference, III Congresso Brasileiro de Soja

Mjesto i datum
Foz do Iguaçu, Brazil, 29.02.2004. - 05.03.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
DSS ; soybean ; fertilizer recommendation ; computer model ; soil analysis

Sažetak
Sophisticated decision support systems are being increasingly applied in the calculation of fertilizer recommendations for soybean and other crops. A presented model calculates the fertilizer requirement using a range of input data, such as: the amount of available nutrients in the soil, nutrient removal with target yield, soil organic matter decomposition (according to the amount and type of harvest residues, C:N:P: ratio, application of organic fertilizers, soil humus content, soil pH value, climatic conditions), soil texture, field slope and exposition, soil water properties and management, field production level, etc. It also contains the possibility of analytical model selection considering the available phosphorus and potassium content in the soil (Olsen, Bray, CAL, DL, AL, CaCl2). A plant nutrient requirement is calculated from the soil analyses data, by the particular score functions generated by field trials and incorporated in related subroutines. Soybean as a preceding crop is valued according to the achieved yield. Beside of N, P2O5 and K2O dosage per hectare, this calculator estimates the eventual lime requirement and gives advices related to the economy of production, fertilizer distribution and application, instruct about the limiting factors and soil suitability for soybean. The calculator is written in JavaScript and automatically connected with input data base, while all results and recommendations are stored in output data base. Presented decision support system was calibrated by large number of field trials and is currently in usage by Croatian Extension service, under patronage of Ministry of agriculture and forestry in Republic of Croatia.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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