World Journal of Agricultural Research

ISSN (Print): 2333-0643

ISSN (Online): 2333-0678

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Calculating Biogas Potential in Croatia: Case of a PIG Farm and Small-scale Digestion

1Department for Economy, Regional Development and EU Funds, Sisak- Moslavina County, Sisak, Croatia

2Innova Energy, Lierde, Belgium

World Journal of Agricultural Research. 2016, 4(3), 94-97
doi: 10.12691/wjar-4-3-5
Copyright © 2016 Science and Education Publishing

Cite this paper:
A. M. Spicnagel, T. Puskaric, J. Van Driessche. Calculating Biogas Potential in Croatia: Case of a PIG Farm and Small-scale Digestion. World Journal of Agricultural Research. 2016; 4(3):94-97. doi: 10.12691/wjar-4-3-5.

Correspondence to: J.  Van Driessche, Innova Energy, Lierde, Belgium. Email:


With Croatia becoming a member of the European Union in 2013, the country faces numerous challenges and opportunities. The energy production from organic waste is less than 3 % of total energy production, although the potential is 10 times higher. It becomes evident that the agricultural sector can play an important role in reaching the country’s renewable energy target. Moreover, research and field trials indicate the opportunities for digestate as a replacer of mineral fertilizer. In order to boost the agro- energy sector, Sisak–Moslavina County joined the FP7 funded project - INEMAD (Improved Nutrient and Energy Management through Anaerobic Digestion, 2012-2016) - whose main goal is to reconnect livestock and crop production in a sustainable way. In order to investigate potentials, SMC, together with two Belgian partners (DLV Belgium, Innova Energy) prepared a feasibility study of the biogas potential for the pig farm K. from Osijek – Baranja County. The pig farm has a production capacity of 7.200 pigs. The feasibility study showed that for a farm of this size an optimal solution would be an installation of a small-scale digester. In the specific case, the plant of 38 kWel would allow the framer to spread the manure/ digestate more easily and generate electricity that could be used on the farm. However, the plant of 11 kWel. would be enough for covering the farm´s energy needs which allows farmer to use specific renewable energy sources focused governmental subsidies. Based on the biogas calculation tool, developed by DLV Belgium, the biogas unit of 11 kWel. could produce 54.000 m3/year of biogas (approximately 59.600 m3/year of biomethane). Another added value of the biogas plant implementation would be an improved nutrient management that would result in creating highly valuable organic fertilizer - digestate. This contribution provides insights in the feasibility study preparation and answers to farmer ownership questions on biogas production in organic farming that is similar in size and capacity.



[1]  K. Celic et al. (2012). Annual energy report – Energy in Croatia 2011, Ministry of Economy, Republic of Croatia.
[2]  Interactive map of renewable energy installation in Croatia, Ministry of Economy, Labor and Entrepreneurship, Republic of Croatia.
[3]  D. Brdaric, D. Kralik, S. Kukic, R. Spajic, G. Tunjic (2009). Conversion of organic manure into biogas. Original scientific paper.
[4]  Strategy of rural development of Croatia, 2008. – 2013.
[5]  Strategy of agricultural land consolidation, 2009. – 2021.
Show More References
[6]  Principles of Good Agricultural Practice, Ministry of agriculture, fishery and rural development, 2009, Zagreb.
[7]  MPS, Program ruralnog razvoja Republike Hrvatske za razdoblje 2014. – 2020., Nacrt Programa za međupravne konzultacije, Zagreb, Ministarstvo poljoprivrede, 2014.
[8]  World bank, Agriculture, value added (% of GDP), Croatia (2011 – 2015),
[9]  Eurostat – Structure of agriculture in Croatia, data from 09/2013,
[10]  Payment agency in Agriculture, Upisnik poljoprivrednih gospodarstava, date 22/09/2015,
[11]  G. Kralik et al. (2012). Particularities of pig breeding in the Republic of Croatia – current state and future prospects. Krmiva
[12]  HROTE, 2015, Postrojenja instalirane snage ≤ 5 MW, .
[13]  Ministry of Agriculture, Croatia, Rural Development Programme of the Republic of Croatia for the period 2014 – 2020
[14]  ARBOR project (2012 – 2015) – Accelerating Renewable Energies through valorization of Biogenic Organic Raw Material. INTERREG IVB.
Show Less References


Mushroom (Pleurotus ostreatus) Waste Powder: Its Influence on the Growth and Meat Quality of Broiler Chickens (Gallus gallus domesticus)

1Department of Agriculture, Davao Oriental State College of Science & Technology, San Isidro Campus –Philippines

World Journal of Agricultural Research. 2016, 4(4), 98-108
doi: 10.12691/wjar-4-4-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
RUDY M. CAMAY. Mushroom (Pleurotus ostreatus) Waste Powder: Its Influence on the Growth and Meat Quality of Broiler Chickens (Gallus gallus domesticus). World Journal of Agricultural Research. 2016; 4(4):98-108. doi: 10.12691/wjar-4-4-1.

Correspondence to: RUDY  M. CAMAY, Department of Agriculture, Davao Oriental State College of Science & Technology, San Isidro Campus –Philippines. Email:


The study was composed of six levels of mushroom waste powder (0, 5, 10, 15, 20 and 25 grams MWP per kg of basal feed) supplemented to the basal feed of broiler chickens. The experiment was conducted in a completely randomized design in three replications to determine the effects of mushroom waste powder levels on body weight, feed consumption, feed conversion efficiency, average daily gain in weight, and meat quality of broiler chickens. Average daily gain (ADG) in weight and body weight (BW) negatively affected by MWP at the early age of broiler chickens, then slightly improved over time of feeding, but does not vary between treatments (P>0.05). Feeding broiler chickens up to 20 grams MWP significantly increased feed consumption (FC), however, a 25 grams MWP significantly decreased (P=0.01) feed consumption during 18 days period of feeding. Feed consumption efficiency (FCE) slightly improved over time but does not varies (P>0.05) with the control. Broiler meat quality varies significantly with the level of MWP in terms of texture (p=0.0017), tenderness, (p= 0.0001), taste p=0.049) and general acceptability (p=0.0018). However, within these parameters, meat quality of broilers fed with MWP at all levels generally does not vary from the control, except for T2 in terms of taste and tenderness where it is significantly lower compared to the control treatment. MWP does not compromise, in fact, slightly improved the meat quality of broiler chickens. A slight improvement of average daily gain in weight (ADG), body weight (BW), feed conversion efficiency (FCE) and meat quality; and a decrease in feed consumption (FC) with increasing levels of MWP is an indication that MWP is a potential feed additive in chickens. Another study to layer chickens and age of administration maybe done to investigate further the potential of MWP.



[1]  Miles, D. M., S. L. Branton, and B. D. Lott. 2004. Atmospheric ammonia is detrimental to the performance of modern commercial broilers. Poultry Science 83:1 650-1654.
[2]  Reyes, R. G., S. P. Kalaw, Rm R. Dulay, H. Yoshimoto, N. Miyazawa, T. Seyama, and F. Eguchi. "Philippine Native and Exotic Species of Edible Mushrooms Grown on Rice-Straw- Based Formulation Exhibit Nutraceutical Properties." PHILIPP AGRIC SCIENTIST 2013th ser. 96.2 (2013): 198-204. UPLB Journals. UPLB, June 2013. Web. 3 Dec. 2014.<
[3]  Rogers, Albert. “A Book Review: The Fungal Pharmacy: Medicinal Mushrooms of Western Canada. “ International Journal of Medicinal Mushrooms, 10.1 (2009): 97-100. Web.12 May 2014.
[4]  Isaacs, Tony. “Top Food Choices for Avoiding and Beating Cancer.” Weblog post. Natural News. ISAOZ, 13 May 2012. Web. 5 Nov. 2014. <>.
[5]  Soriano, Emily. “DA Puts up P8 Million Mushroom Technology Center in Tarlac to Boost Production, Substitute Mushroom Import from Taiwan Read More at Http://” usiness Diary. Mushroom Technology Center, DA, Tarlac, 8 May 2013. Web. 7 Jan. 2015. <>.
Show More References
[6]  Guo, C. F., B. A. Williams, R. P. Kwakkel, H. S. Li, X. P. Li, W. K. Li, J. Y. Lou, and M. W. Verstegen. “Effects of Mushroom and Herb Polysaccharides, as Alternatives for an Antibiotic, on the Cecal Microbial Ecosystem in Broiler Chickens.” Diss. Wageningen U, 2004. Abstract. Poultry Science83.2 (2004): 175-82.
[7]  Fard, S. H., M. Toghyani, and S. A. Tabeidian. “Effect of Oyster Mushroom Wastes on Performance, Immune Responses and Intestinal Morphology of Broiler Chickens.” Int J Recycl Org Waste Agricult 2014th ser. 3 (2014): 141-46. Springer., 30 Sept. 2014. Web. 3 Nov. 2014.
[8]  Jiménez-Moreno, E., J.M. González-Alvarado, A. De Coca-Sinova, R. Lázaro, G.G. Mateos, 2009a: Effects of source of fibre on the development and pH of the gastrointestinal tract of broilers. Anim. Feed Sci. Technol. 154, 93-101.
Show Less References


Adoption of Improved Cassava Processing Technologies by Women Entrepreneur in South – West, Nigeria

1Department of Entrepreneurship Management Technology, Federal University of Technology, Akure

2Department of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria

World Journal of Agricultural Research. 2016, 4(4), 109-113
doi: 10.12691/wjar-4-4-2
Copyright © 2016 Science and Education Publishing

Cite this paper:
Ehinmowo O.O, Fatuase A.I. Adoption of Improved Cassava Processing Technologies by Women Entrepreneur in South – West, Nigeria. World Journal of Agricultural Research. 2016; 4(4):109-113. doi: 10.12691/wjar-4-4-2.

Correspondence to: Fatuase  A.I, Department of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria. Email:


The study examined factors influencing adoption of cassava processing technologies by women entrepreneur in South – West, Nigeria using primary data. A multistage sampling technique was used to select 373 respondents with the aid of a structured questionnaire. Descriptive statistics and probit regression model were used to analyse the data. Results revealed that majority (74%) of the women entrepreneur were under 50 years, 80% were married with an average age of 43 years. About 86.6% of the respondents had primary education with 51% of the respondents having 4 - 6 members per house. It further revealed that 67% of the women entrepreneur adopted improved technologies with cassava mechanical grater being the most used improved technology while the factors affecting adoption of the technologies were educational status, source of information, credit and raw material. It was also revealed that the challenges faced by the women entrepreneur were high cost of equipment, non-availability of the technologies, difficult to operate and lack of knowledge. The study concluded that there should be easy accessibility to improved technologies among women entrepreneurs.



[1]  David, R, Entrepreneurship in Business Enterprise, 2013.
[2]  Petrin, K, Entrepreneurship and supporting institutions: An analytical approach, International Rural Development Summer School, Herrshing Germany, 8-14 Sept., 1991.
[3]  Khurram, H, Introduction and implementation of, 2006.
[4]  Central Bank of Nigeria (CBN) Statistical Bulletin. Vol. 14. December, p. 259-260.
[5]  United Nations Industrial Development Organization, Report of the Secretary – General on the Review and Appraisal of the Progress Made in Achieving the Goals and Objectives of the Programme of Action of the International Conference on Population and Development, 2004. Population Newsletters Number 77. Population Division of the United Nations Secretariat, Department of Economic and Social Affairs New York, 2004. Retrieved from:, (Accessed on: December 06, 2010).
Show More References
[6]  Oni, B., Socio-economic Aspect of Cassava Cultivation and Use in Africa: Implications for Development of appropriate Technology, International Institute of Tropical Agriculture, Ibadan, Nigeria, COSCA Working Paper No.8 Collaborative Study of Cassava in Africa, 2006.
[7]  Jerome, A, Technical efficiency in some privatized enterprises in Nigeria. African Journal of Economic policy, vol. 11, No1, pp 17-34.
[8]  Nweke, F.I, Processing Potentials for Cassava Production Growth. Working Paper No. 11. Collaborative Study on Cassava in Africa International Institute of Tropical Agriculture, Ibadan, pp.50-52, 1994.
[9]  Awoyemi, T.T, A Gender Analysis of Economic Efficiency of Cassava Based Farm holding. Unpublished PhD Thesis, Department of Agricultural Extension Services, University of Ibadan, Oyo State, 2000.
[10]  Suleman, A, Factors Influencing Adoption of Improved Cassava Processing Technologies by Women Processor in Akoko-Edo, Edo State. Faculty of Agriculture, Ahmadu Bello University, Zaira, Nigeria. Published Thesis, 2012.
[11]  Ekong, E.E, An Introduction and Analysis of Rural Nigeria (Second Edition), Dove Publishers Limited, Uyo, Nigeria pp 369, 2003.
[12]  Agbamu, J.U, Essential of Agricultural Communication in Nigeria. Malthouse Press Limited, 11B Gorola Street, Off Adeola Victoria Island, Lagos, 2006.
[13]  Yusuf, H.O, Factors Influencing Adoption of Improved Groundnut Oil Processing Technologies by Rural Women in Kaduna State, Nigeria. Unpublished M.Sc. Thesis, Department of Agricultural Economics and Rural Sociology, Ahmadu Bello University, Zaria, 2009.
[14]  Wole-Alo, F.I. and Okunlola, J.O, Utilization of Modern Cassava Processing Technologies among Smallholder Women Processor in Ondo State, Nigeria. Journal of Biology, Agriculture and Healthcare, 5(12): 29-33. 2015
[15]  Mokonem, H, The Structure of Agricultural Production, Factors of Productivity and Technology Adoption In Cote ‘d Ivore. Dissertation Abstract International 5(2):74, 1991.
[16]  Rogers, E.M, Diffusion of Innovations. Collier Macmillan, 3rd edition, New York, 220p, 1995.
[17]  Odoemenem, I.U, Capital Resource Mobilization and Allocation Efficiency by Small – Scale Cereal Crop Farmers of Benue State, Nigeria. Unpublished Ph.D. Dissertation, Department of Agricultural Economics Management and Extension, Ebonyi State University, Abakaliki, Nigeria, 2007.
[18]  National Bureau of Statistics, Provisional Total 2006 census figures by Local Government Areas: as retrieved on 9th of March, 2010.
[19]  Gujarati, D.N., Porter, D.C, “Basic Econometrics,” Fifth Edition, McGraw – HILL International Editions Economics Series, Singapore, 2009.
[20]  Ukoha, O.O, Contribution of women to farm family in Ikwuano Local Government Area of Abia State, Nigeria. Journal of Agriculture, 1(2): 125-130, 2003.
[21]  Osuji, L.O, “Institutional Factors Associated with Adoption of New Farm Techniques Among Farmers in Eastern Nigeria, Nigerian Journal of Agricultural Extension 1(2):43-53, 1983.
[22]  Oluwatayo, I.B, “Explaining inequality and welfare status of households in rural Nigeria: Evidence from Ekiti state,” In humanity and social science journal 3 (1): 70-80, 2008.
Show Less References