Physical Properties of Briquette Fertilizers Made from Urea and Fly Ash-Azolla

Agus Hermawan, Adipati Napoleon, Bakri Bakri


Coal fly ash and Azolla biomass are potential materials to be used as raw materials for the manufacture of briquette fertilizers. In this study, the coal fly ash, azolla and urea in various compositions were mixtured to make briquette fertilizers. The study was conducted to evaluate the physical properties of briquette fertilizers, i.e bulk density, compressive strength, porosity, and water holding capacity on various compositions of fly ash-azolla and urea. The research was arranged in a Completely Randomized Design with three replicates. The formulation of briquette fertilizers as treatments was made with the compossition (w/w, dry-weight basis) of (fly ash : azolla) + urea as follows: (40:60)90+10; (40:60)80+20; (40:60)70+30; (50:50)90+10; (50:50)80+20; (50:50)70+30; (60:40)90+10; (60:40)80+20 and (60:40)70+30. The results showed that the variation in composition of coal fly ash-azolla and urea significantly affected the compressive strength, bulk density, water holding capacity and porosity of briquette fertilizers produced. The increase in the proportion of fly ash or the decrease of azolla biomass proportion tends to increase compressive strength and bulk density, and tends to decrease the water holding capacity and porosity of briquette fertilizers produced.


Azolla; briquette fertilizer; fly ash; urea

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Ali S and F Danafar. 2015. Controlled-Release Fertilizers: Advances and Challenges. Life Sci J 12: 33-45.

Behin J and N Sadeghi. 2016. Utilization of waste lignin to prepare controlled-slow release urea. Int J Recycl Org Waste Agric 5:289-299.

Bhuvaneshwari K and A Kumar. 2013. Agronomic potential of the association Azolla-Anabaena. Sci Res Reporter 3: 78-82.

Carlson CL and DC Adriano. 1993. Environmental impacts of coal combustion residues. J Environ Qual 22: 227-247.

Dong, YJ, MR He, ZL Wang, WF Chen, J Hou, XK Qiu and JW Zhang. 2016. Effects of new coated release fertilizer on the growth of maize. J Soil Sci Plant Nut 16: 637-649.

Havlin JL, JD Beaton, SL Tisdale and WL Nelson. 2005. Soil fertility and fertilizers an introduction to nutrient management. 7thed. Prentice Hall, New Jersey.

Hermawan A, Sabaruddin, Marsi, R Hayati and Warsito. 2014. P use efficiency by corn (Zea mays L.) in Ultisol due to application of coal fly ash-chicken manure mixture. Agrivita 36: 146-152.

Hou J, YJ Dong and ZY Fan. 2014. Effects of coated urea amended with biological inhibitors on physiological characteristics, yield, and quality of peanut. Comm Soil Sci and Plant Anal 45: 896-911.

Kishor P, AK Ghosh and D Kumar. 2010. Use of fly ash in agriculture: A way to improve soil fertility and its productivity. Asian J Agric Res 4: 1-14.

Kollah B, AK Patra and SR Mohanty. 2015. Aquatic microphylla Azolla: a perspective paradigm for sustainable agriculture, environment and global climate change. Environ Sci Pollut Res. doi: 10.1007/s11356-015-5857-9.

Kurnia U, F Agus, A Adimihardja and A Dariah. 2006. Sifat Fisik Tanah dan Metode Analisisnya. Balai Besar Litbang Sumberdaya Lahan Pertanian. Bogor (in Indonesian).

Lubkowski K. 2014. Coating fertilizer granules with biodegradable materials for controlled fertilizer release. Environ Eng Manag J 13: 2573-2581.

Ma SH, MD Xu, Qiqige X, H Wang and X Zhou. 2017. Challenges and Developments in the Utilization of Fly Ash in China. Int J Environ Sci Develop 8: 781-785.

Mitra BN, S Karmakar, DK Swain and BC Ghosh. 2003. Fly ash - a potential source of soil amendment and a component of integrated plant nutrient supply system. 2003. Internasional Ash Utilization Symposium. University of Kentucky.

Nainggolan GD, Suwardi and Darmawan. 2009. Pola pelepasan nitrogen dari pupuk tersedia lambat (slow release fertilizer) urea-zeolit-asam humat. J Zeolit Indonesia 8: 89-69.

Nimmo JR. 2004. Porosity and Pore Size Distribution, In: D Hillel (eds) Encyclopedia of Soils in the Environment, London, Elsevier, V. 3, pp. 295-303.

Obour PB, JL Jensen, M Lamandé, CW Watts and LJ Munkholm. 2018. Soil organic matter widens the range of water contents for tillage. Soil Till Res 182: 57-65.

Qiu XK, YJ Dong, GQ Hu and YH Wang. 2011. Effects of homemade coated controlled release fertilizers on physiological characteristics, yield and quality of Chinese cabbage. Acta Pedologica Sinica 48: 375-382.

Roy DC, MC Pakhira and S Bera. 2016. A review on biology, cultivation and utilization of Azolla. Adv Life Sci 5: 11-15.

Shaviv A. 2005. Advances in Controlled Release of Fertilizers. Adv Agronomy 71:1-49.

Singh S, DP Gond, A PaI, BK Tewary and A Sinha. 2011. Performance of several crops grown in fly ash amended soil. World of Coal Ash (WOCA) Conference. Denver, CO, USA.

Sposito G. 2008. The chemistry of soils. 2nd Edition. Oxford University Press, Inc. New York. USA.

Srinavas P, SSV Padma, KP Sastry and KBS Devi. 2017. Analysis the effect of fly ash and vermicompost combination on herb yield, oil content and oil composition of lemongrass (Cymbopogon flexuosus Nees). Int J Pure App Biosci 5: 1710-1717.

Sulakhudin, A Syukur and BH Sunarminto. 2011. Zeolite and Hucalcia as Coating Material for Improving Quality of NPK Fertilizer in Costal Sandy Soil. J Trop Soils 16: 99-106.

Teixeira RS, IR. Silva, R.N. Sousa, Edson, M Mattiello and EMB Soares. 2016. Organic acid coated-slow-release phosphorus fertilizers improve P availability and maize growth in a tropical soil. J Soil Sci Plant Nut 16: 1097-1112.

Trenkel ME. 2010. Controlled-Release and Stabilized Fertilizers in Agriculture. Improving Fertilizer Use Efficiency. Second edition, International Fertilizer Industry Association (IFA), FAO, Paris. 160 pp.

Yao ZT, XS Ji, PK Sarker, JH Tang, LQ Ge, MS Xia and YQ Xi. 2015. A comprehensive review on the applications of coal fly ash. Earth-Sci Rev 141: 105-121.



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