1. Biomass,
https://en.wikipedia.org/wiki/Biomass
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2. Compost basics, types and methods, an overview.
https://en.wikipedia.org/wiki/Compost
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3. Haile, A., & Ayalew, T. (2018). Comparative study on the effect of bio-slurry and inorganic N-Fertilized on the growth and yield of Kale. Accepted 13 February 2018. ISSN 1996-0824 Copyright © 2018 Author(s) retain the copyright of this article.
http://www.academicjournals.rg/AJPS
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4. Jared, N., Erastus, G., Christopher, N., & Steve, A. (2018, September 10). Evaluation of biogas slurry as an alternative organic fertilizer.
https://www.researchgate.net/publication/308892484_Evaluation_of_Biogas_Slurry_as_An_Alternative_Organic_Fertilizer_A_Case_Study_in_Kenya
.
5. Nakasaki, K., Yaguchi, H., Sasaki, Y., & Kubota, H. (1993 March 1). Effect of pH control on composting of garbage.
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