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11.
The accuracy of the germination rate of seeds based on image processing and artificial neural networks
Uroš Škrubej, Črtomir Rozman, Denis Stajnko, 2015, izvirni znanstveni članek

Opis: This paper describes a computer vision system based on image processing and machine learning techniques which was implemented for automatic assessment of the tomato seed germination rate. The entire system was built using open source applications Image J, Weka and their public Java classes and linked by our specially developed code. After object detection, we applied artificial neural networks (ANN), which was able to correctly classify 95.44% of germinated seeds of tomato (Solanum lycopersicum L.).
Ključne besede: image processing, artificial neural networks, seeds, tomato
Objavljeno: 14.11.2017; Ogledov: 742; Prenosov: 245
.pdf Celotno besedilo (353,43 KB)
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12.
Ocena investicije v razvoj dopolnilnih dejavnosti na ekološki kmetiji
Davorin Fošnarič, 2017, diplomsko delo/naloga

Opis: V letu 2017 smo na ekološki kmetiji Fošnarič ugotavljali oceno investicije v razvoj dopolnilne dejavnosti na ekološki kmetiji, ki se ukvarja z rejo krav dojilj, in sicer gre za odprtje manjše trgovine z mesom z lastno hladilnico. Najprej smo naredili zatečeno stanje kmetije in ovrednotili letni pridelek in vrednost krme, koliko dela je potrebnega, kakšen je stalež živali, kakšni so skupni prihodki kmetije z direktnimi plačili in brez njih ter kakšni so skupni odhodki. Nato smo ocenili vrednost investicije (12.280 EUR) in izračunali dobo povratka na podlagi 5,5 % obrestne mere. Predpostavljali smo, da se bo investicija povrnila v petih letih. Rezultati so pokazali dobo povratka v drugem letu.
Ključne besede: ekološka živinoreja, investicija, dopolnilna dejavnost
Objavljeno: 22.09.2017; Ogledov: 721; Prenosov: 209
.pdf Celotno besedilo (901,92 KB)

13.
Validation of agent-based approach for simulating the conversion to organic farming
Črtomir Rozman, Andrej Škraba, Karmen Pažek, Davorin Kofjač, 2017, izvirni znanstveni članek

Opis: Background and Purpose: The purpose of this study is to describe the principles of the development of parallel system-dynamics and agent-based models of organic farming for the case of Slovenia. The advantage of agent-based modeling is demonstrated by including geospatial information as an agent attribute. The models were compared by the validation, confirming the appropriate level of similarity. Design/Methodology/Approach: Both system-dynamics and agent-based modeling approaches were applied. Statistical methods were used in the validation. Results: The results of the validation confirm the appropriateness of the proposed agent-based model. Introducing additional attributes into the agent-based model provides an important advantage over the system-dynamics model, which serves as the paradigmatic example. Conclusion: A thorough validation and comparison of the results of the system-dynamics and agent-based models indicates the proper approach to combining the methodologies. This approach is promising, because it enables the modeling of the entire agricultural sector, taking each particular farm into account.
Ključne besede: agent-based models, organic farming, system dynamics, validation, multimethod simulation
Objavljeno: 01.09.2017; Ogledov: 911; Prenosov: 320
.pdf Celotno besedilo (798,59 KB)
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14.
Decision making under conditions of uncertainty in agriculture
Karmen Pažek, Črtomir Rozman, 2009, pregledni znanstveni članek

Opis: In decision under uncertainty individual decision makers (farmers) have to choose one of a set number of alternatives with complete information about their outcomes but in the absence of any information or data about the probabilities of the various state of nature. This paper examines a decision making under uncertainty in agriculture. The classical approaches of Wald’s, Hurwicz’s, Maximax, Savage’s and Laplace’s are discussed and compared in case study of oil pumpkin production and selling of pumpkin oil. The computational complexity and usefulness of the criterion are further presented. The article is concluded with aggregate the results of all observed criteria and business alternatives in the conditions of uncertainty, where the business alternative 1 is suggested.
Ključne besede: uncertainty, Wald’s, Hurwicz’s, Maximax, Savage’s and Laplace’s criterion, decision support system, agriculture, oil crops
Objavljeno: 20.07.2017; Ogledov: 501; Prenosov: 76
.pdf Celotno besedilo (174,59 KB)
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15.
Application of analytical hierarchy process in agriculture
Karmen Pažek, Črtomir Rozman, 2005, izvirni znanstveni članek

Opis: Hierarchical decision models are a general decision support methodology aimed at the classification or evaluation of options that accur in desion-making processes. Decision models are typically developed through the decomposition of complex decision problems into smaller and less comple subproblems. This paper presents an approach to the development and implementation of multicriteria decision model based on Analytical Hierarchy Process - AHP (Expert Choice, EC). Likewise, the AHP is used as a potential multicriteria decision making method for application in agriculture. In order to show the implementation of explained MCDA methods in real situation in agriculture, theapplication of AHP on a sample model farm is presented in the second part of the article.
Ključne besede: multicriteria decision analysis, MCDA, analytical hierarchy process, AHP, decision support system, DSS, agriculture
Objavljeno: 20.07.2017; Ogledov: 682; Prenosov: 150
.pdf Celotno besedilo (177,82 KB)
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16.
Analiza ekonomske upravičenosti različnih načinov prehrane nesnic
Sabina Selič, 2017, diplomsko delo/naloga

Opis: Pri reji kokoši nesnic govorimo o pridelavi za namene prehranskega trga. Na prodajnih policah se srečujemo z obsežno ponudbo takšnih in drugačnih pakiranj jajc z različnimi oznakami in različnimi cenami. Namen diplomskega dela je na osnovi raziskovanja v podjetju, ki prideluje širok asortiman izdelkov (pakiranih jajc), ugotoviti vzroke za različna pakiranja po različnih cenah na maloprodajnih policah. V diplomskem delu obravnavano podjetje je Meja Šentjur, d. d., ki združuje vse načine reje kokoši nesnic: baterijska, hlevska, reja kokoši na prostem in ekološka reja kokoši nesnic. Prav tako pridelujejo jajca z dodatki in certificirana jajca. Omenjeno podjetje smo analizirali v posamezni pridelavi jajc tako s proizvodnega kakor tudi s stroškovnega vidika. Sklepanje je potekalo na osnovi rezultatov analiz, ki se kažejo predvsem v ekonomski upravičenosti posameznega jajca. Različna pakiranja jajc na prodajni polici imajo za seboj različne proizvodnje in s tem tudi različne stroške. Prav tako imajo različne (tudi po različnih cenah) dobavitelje prehrane za kokoši nesnice. V nalogi se dotaknemo še vpliva cene prehrane na končno ceno jajca. Obravnavali smo različne načine reje kokoši in ugotovili vzroke za različne cene jajc iz različnih načinov reje. Jajca, ki se ponašajo z določenimi certifikati, so tudi dražja, saj se pri pridelavi teh jajc pojavljajo tudi stroški, ki jih pri drugih pakiranih jajcih ni. Jajca z dodatki so jajca kokoši nesnic, ki so krmljena z obogateno prehrano kokoši, ta pa je dražja od klasične prehrane kokoši nesnic. Prehrana kokoši nesnic je največji in strateški strošek pri pridelavi jajc, od katere je nato odvisna cena jajc.. Kokoši nesnice v različnih načinih reje pojedo različno količino krme, prav tako je v vseh načinih reje kokoši nesnic ista krma, razen pri ekološki. Posledično se to odražana cenah; jajca baterijske reje so najcenejša tako za pridelovalca kakor tudi nato za kupca. Pri različnih dobaviteljih prehrane za kokoši nesnice iste kakovosti je smotrno izbrati najcenejšega, ker bo s tem tudi pridelava jajc cenejša. Kakovostna prehrana kokoši nesnic in ugodna cena le-te sta ključ do uspeha v pridelavi jajc in konkurenčnosti na trgu oziroma pri trgovcih.
Ključne besede: jajca, prehrana za kokoši, jajca z dodatki, certificirana jajca
Objavljeno: 11.07.2017; Ogledov: 1107; Prenosov: 114
.pdf Celotno besedilo (680,19 KB)

17.
The milk quality and feasibility analysis of loose housing dairy cows
Marjan Janžekovič, Črtomir Rozman, 2006, izvirni znanstveni članek

Opis: The aim of the study was technological and economical analysis of free range cow breeding. The case study analyzed two different systems of holstein-fresian dairy cows breeding. The model total costs enterprise budget was developed for evaluation of economic feasibility of loose housing dairy cows in comparison with tied cow breeding system. Computer supported calculation enabled estimation of the most important economical parameters (net return, observed input parameters) loose housing system is economically feasible, if there is a minimum of 41 dairy cows with an average milk production of 8610 kg per cow. It was also established that cows need approximately 6 months to fully adapt to the loose hausing system.
Ključne besede: loose housing, dairy cows, milk quality, coefficient of economy
Objavljeno: 10.07.2017; Ogledov: 610; Prenosov: 81
.pdf Celotno besedilo (221,55 KB)
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18.
The economic viability of value-based food chain for dairy farms in mountain regions
Jernej Prišenk, Andreja Borec, Marjan Janžekovič, Ivo Grgić, Karmen Pažek, Črtomir Rozman, Jernej Turk, 2016, izvirni znanstveni članek

Opis: The attention of this paper is drawn to analyze the economic potential of involvement of farmers into the small-medium sized value-based food chain (VBFC). The survey represents a solid data basis from which econometric modelling approach was further developed. Empirical results reveal the positive economic viability on a general level; this means more stable purchase price of raw milk for dairy farms, which are the part of value-based food chain. Results point at inelastic demand for milk and milk related products. Furthermore, there are some accompanying and underlying indirect social benefits, such as production of high-quality food products, more stable and constant demand for raw milk, steady payments and better social situation. The last one is especially important for the farms operating in less-favored mountain areas where the survey was actually conducted.
Ključne besede: mountain dairy farms, demand for milk, Value-based food chain, econometric modelling
Objavljeno: 10.07.2017; Ogledov: 477; Prenosov: 73
.pdf Celotno besedilo (272,24 KB)
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19.
Multiple-criteria approach of evaluation of milk farm models in Bosnia and Herzegovina
Črtomir Rozman, Zoran Grgić, Aleksandar Maksimović, Ferhat Ćejvanović, Adis Puška, Branka Šakić Bobić, 2016, izvirni znanstveni članek

Opis: Cattle breeding is a very important part of agricultural production in Bosnia and Herzegovina (B&H), and milk production has a vital place in cattle breeding production. From an economic point of view, milk production is interesting as it is a daily production which presupposes faster marketing, which accelerates capital movement in agriculture, which in turn enhances liquidity. This research uses analyses of the existing state in milk production. The collected data are processed and cost calculation has been designed which enables the analysis of economic indicators of 4 dairy farm production models in B&H. Based on the collected data on features and values of dairy farm production models in B&H an analysis of expert evaluation was conducted as input data for DEXi method. The aim of this paper is to ascertain the basic indicators of business success of 4 dairy farm production models in B&H. Production-ecological, economic and socio-political features of the mentioned dairy farm models were analyzed. Based on the used criteria a rate of dairy farm production models using DEXi method was conducted. The results of the research in this paper using DEXi method show that the best model for dairy farm is model number four, which includes 45 milk cows.
Ključne besede: dairy farms, production models, economic indicators, DEXi, Bosnia and Herzegovina
Objavljeno: 10.07.2017; Ogledov: 516; Prenosov: 273
.pdf Celotno besedilo (1,93 MB)
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20.
Multi-criteria and econometric evaluation of dairy products
Karmen Pažek, Jernej Turk, Sebjan Hari, Črtomir Rozman, Jernej Prišenk, 2014, izvirni znanstveni članek

Opis: This study examined the multi-criteria assessment of four dairy products: "Pomursko mlejko" (Pomurje milk), "Lejko mleko" (light milk), "Fyto mleko" (Fyto milk) and "Posneto mleko v prahu" (dried milk). The research was executed by using a multi-criteria methodology, DEX, which was complemented by an econometric analysis for light milk to estimate the trends in production and consumption before analyzed dairy products were implemented on the market. DEXi computer program results indicated that all analyzed milk products were 'above average'. The econometric model was applied to examine changes in the demand for low-fat milk (light milk). Empirical results showed significant consumer response to the increase in the prices of low-fat milk demonstrating income elasticity (1,15 unit).
Ključne besede: multi-attribute decision theory, DEXi, econometric analysis, milk products
Objavljeno: 10.07.2017; Ogledov: 659; Prenosov: 79
.pdf Celotno besedilo (636,19 KB)
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