Nugroho, Sutopo Ghani and Dermiyati, - and Lumbanraja, Jamalam and Triyono, Sugeng and Ismono, R Hanung and Sari, Yosa Triolanda and Ayuandari, Elva (2012) Optimum Ratio of Fresh Manure and Grain Size of Phosphate Rock Mixture in a Formulated Compost for Organomineral NP Fertilizer. Journal of Tropical Soils, 17 (2). pp. 121-128. ISSN 0852-257X

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The objective of multi years study was to formulate an alternative organic based fertilizer by mixing a fresh manure and phosphate rock with several different grain sizes conducted in the Field Experimental Station of the University of Lampung. Both materials of the fresh manure and phosphate rock were obtained from local sources. Five levels of mixture of fresh manure and phosphate rock, three levels of grain size of phosphate rock, and two kinds of composting technique were factorial set up. The mixture materials were aerobically composted for 12 weeks. The results of the first year study show that (a) the optimum ratio of the mixture of fresh manure and phosphate rock was 80% to 20% with the optimum of grain size of phosphate rock < 3 mm; (b) 6-8 weeks of incubation of the mixture materials has been optimally composted under aerobic conditions of the complete mixture of batch composted technique; (c) the quality of the final produced compost was considered to fulfill the requirement of standard criteria of organic fertilizer; while (d) the quantity of compost recovered up to 75.07% which was a reliable quantity of mass production of organic fertilizer.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Prof.Dr.Ir Jamalam Lumbanraja
Date Deposited: 22 Nov 2016 01:02
Last Modified: 22 Nov 2016 01:02

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