Prof. Ir. Zainal Muktamar, M.Sc., Ph.D.

Name: Prof. Ir. Zainal Muktamar, M.Sc., Ph.D

Current Office Address: Soil Science Laboratory, Faculty of Agriculture, University of Bengkulu. Jalan WR Supratman Kandang Limun, Bengkulu, Indonesia.

Email: muktamar@unib.ac.id

Education:

University of Kentucky, Lexington, USA

1989-1992

PhD degree in Soil Chemistry

University of Kentucky, Lexington, USA

1986-1989

Master degree in Soil Chemistry

Gadjah Mada University, Yogyakarta, Indonesia

1978 – 1983

Bachelor degree in Soil Science

Working experience:

University of Bengkulu

Lecturer 1984 – now

Teaching, research and community development

Doctoral Program for Agricultural Sciences, Faculty of Agriculture

Coordinator (2019-2021)

Univesity of Bengkulu RENPER

Chairman (2014-2021)

University of Bengkulu

FTE Assessor (2010-2022)

Institute of Quality Assurance and Development of Teaching and Learning, University of Bengkulu

Internal Auditor (2021-2022)

Office of Quality Assurance, Faculty of Agriculture

Chairman (2018-2019

University of Bengkulu

Rector (2005-2013)

University of Bengkulu

Vice Rector for Academic Affairs (1996-2005)

Development of Undergarduate Education (DUE) Project, UNIB

Director (1997-2002)

Graduate Program, UNIB

Coordinator (2001-2005)

Local Team for National University Entrance (SPMB)

Chairman (2001-2005)

Program of DUE-like, UNIB

Director (2003-2005)

Engineering Undergraduate Program, UNIB

Coordinator (2003-2005)

Faculty of Agriculture, UNIB

Vice Dea for Academic Affairs (1993-1997)

University of Malaysia Kelantan

External Evaluator to the Rank of Professor (2021-2022)

National Accreditation Boar for Higher Eduation

Study Program Assessor (2018-2022)

Regional Network for Poverty Eradication (RENPER)

Country Representative for Indonesia (2014-2021)

Regional Network for Poverty Eradication (RENPER)

Deputy President (2012-2014)

The Assembly of Indonesian University Rectors

Secretary I

Board of Western State University Network

Chairman (2010-2013)

Directorate General of Higher Education, Ministry of Education and Culture

Coordinator of National Exam Supervision, Bengkulu Province (2007-2013)

Directorate General of Higher Education, Ministry of Education and Culture

Chairman of Teacher Certification Team, Bengkulu Province (2007-2013)

Higher Education Board, Directorate General of Higher Education, Ministry of Education and Culture

New Higher Education Reviewer (2003-2009)

Directorate General of Higher Education, Ministry of Education and Culture Member of Steering Committee for Dissemination and Sustainability of DUE Project Best Practices (2003-2005)

Teaching:

Undergraduate Program

1. Introduction to Agricultural Science
2. Chemistry
3. Organic Chemistry
4. Soil Chemistry
5. Soil Mineralogy
6. English for Special Purposes (Academic)
7. Academic Writing
8. Fundamentals of Soil Science

Graduate Program

1. Development and Climate Change
2. Soil Fertility Management
3. Soil Quality and Health

Philosophy of Science and the Application of Research Methodology

Research Interest:

Soil Chemistry/Fertility Assessment Closed Agricultural Production System Plant Nutrion Management

Research Project:

1. The Effectiveness of the combination of vermicompost and enriched liquid organic fertilizer to improve soil chemical quality under multiple cropping in closed agriculture system (2021, leader)
2. The Stability of liquid organic fertilizer supplementation to vermicompost fertilization to improve soil quality under sweet corn cropping in highland closed agriculture system (2020, leader)
3. The Development of superior solid and liquid organic fertilizer to enhance soil quality in highland closed agriculture system (2017-2019, leader)
4. Enriched liquid organic fertilizer with Zn micro nutrient and its effect on the yield of sweet corn (2019, member)
5. Characterization of inbreed Morphology, Physiology, and Molecular to develop sweet corn hybrid for organic agriculture system (2017, member)
6. Soil quality dynamics under sweet corn cropping in highland closed agriculture system (2015-2016, leader)
7. Organic land management System: Performance of soybean as intercropping of sweet corn (2016, leader)
8. Preliminary evaluation of inbreed sweet corn yield to breed adaptive variety to highland organic environment (2016, member)
9. Development of sweet corn inbreed for breeding of adaptive variety to highland organic agriculture environment (2013-2015, member)
10. A Study of chemical properties and fertility of soil under closed agriculture system in Rejang Lebong District (2012, leader)
11. A Study on the use of pesticides and its impact on vegetable farmer health Rejang Lebong District (2011, member)

Publication:

Book

1. Paraquat Adsorption on Humid Tropical SoilsAdsorpsi (2015) Indonesian. https://www.researchgate.net/publication/299440814_Adsorpsi_Herbisida

_Paraquat_pada_Tanah_Tropika_Basah

Journals and Proceedings

1. The application of compost and Ca(OH)2 to overcome Cadmium (Cd) contamination in Journal of Experimental Agriculture International (JEAI) 44(3):29-37         (2022,                        corresponding         author). https://www.journaljeai.com/index.php/JEAI/article/view/30806/57929
2. Growth and Yield Response to Tomato Extract Liquid Organic American Journal of Multidisciplinary Research & Development (AJMRD) 4(3):25-32 (2022, 5^th author). https://www.ajmrd.com/wp- content/uploads/2022/03/D432532.pdf
3. Soil nitrate availability as influenced by the application of vermicompost supplemented with a liquid organic fertilizer. IJAT 18(1): 281-292. (2022, 1^st author). http://www.ijat-
4. aatsea.com/pdf/v18_n1_2022_January/20_IJAT_18(1)_2022_Muktamar,%20 Z.(12).pdf
5. Vermicompost and Biourine Doses Effect on Soil pH, Shallot Growth, and Yield in American Journal of Multidisciplinary Research & Development (AJMRD) 3(9):44-53 (2021, 4^th author). https://www.ajmrd.com/vol-3-issue-9/
6. Vermicompost Buffering Capacity to Reduce Acidification of Pb and Cd Contaminated Inceptisols and Entisols. Journal of Tropical Soils 26(1):1-9 (20211st author).
7. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/423
8. Nitrogen, phosphorous, and potassium uptakes of organically grown sweet corn on coastal Entisols .International Journal of Agricultural Technology (IJAT) Vol 17(1):213-226      (2021,  1^st        author).               http://www.ijat- com/pdf/v17_n1_2021_January/16_IJAT_17(1)_2021_Muktamar,%20 Z..pdf
9. Soil Organic Carbon in Forest and Other Land Use Types at Bengkulu City, Jurnal Manajemen Hutan Tropika, 27(3): 184-192 (2021, 2^nd author). https://journal.ipb.ac.id/index.php/jmht/article/view/35727/22576
10. Leek (Allium fistulosum, ) Growth and Yield as Affected by Cow Manure and Guava Waste Liquid Organic Fertilizer. Agro Bali : Agricultural Journal 4(3):305-313 (2021,     4^th        author). https://ejournal.unipas.ac.id/index.php/Agro/article/view/732
11. Urban farmer perception on organic vegetable farming in the City of Bengkulu (Case study on Melati Farmer Group in Kandang LImun Village). Mimbar Agribisnis: Jurnal Pemikiran Masyarakat Ilmiah Berwawasan Agribisnis 7(1): 223-232 (2021,                3^rd     author),            https://jurnal.unigal.ac.id/index.php/mimbaragribisnis/article/view/4482/pdf
12. Long beans responses on the aaplication of Ageratum conyzoides based liquid organic fertilizer. Proceeding of National Seminar at 45^th Anniversary of Sebelas Maret University 5(1):234-244 (2021, 4^th author), https://jurnal.fp.uns.ac.id/index.php/semnas/article/view/1779/1153
13. Germination inhibition of sorghum (Sorghum bicolor ) as affected by its main plant and ratoon cultivated in swamp land. Proceeding of 9^th National Seminar on Suboptimal land pp. 426-434. (2021, 5^th author), Indonesian. http://conference.unsri.ac.id/index.php/lahansuboptimal/article/viewFile/2422/ 1373
14. Soil Properties Variability Under Various Agroecosystems In Ultisols Of Terra Journal of Land Restoration 4(2):53-59 (2021, 3^rd author). https://ejournal.unib.ac.id/index.php/terrajournal/article/view/19643/9060
15. Allelopathic effect of sorghum root extract and its potential use as a International Journal of Agricultural Technology (IJAT) 17(6):2317-2332 (2021,      5^th        author).                                       http://www.ijat- aatsea.com/pdf/v17_n6_2021_November/20_IJAT_17(6)_2021_Setyowati,%2 0N.(13).pdf
16. The inhibition of seed germination treated with water extract of sorghum (Sorghum bicolor, ) cultivated in histosols. International Journal of Agricultural  Technology   (IJAT)   17(6):       2385-2402 (2021, 5^th author). http://www.ijat- aatsea.com/pdf/v17_n6_2021_November/25_IJAT_17(6)_2021_Susilo,%20E. (15).pdf
17. The effect of vermicompost and ZA fertilizer on the growth and yield of long beans (Vigna sinesis, L.). Proceeding of 9^th National Seminar on Suboptimal land 514-523 (2021, 5^th author), Indonesian. http://www.conference.unsri.ac.id/index.php/lahansuboptimal/article/viewFile/ 2426/1384
18. Nitrogen and Chicken Manure Effect on Corn Growth and Yield in Double Row Cropping International Journal of Current Science Research and Review 4(11):1495-1503 (2021, 6^th author). https://ijcsrr.org/wp- content/uploads/2021/11/04-06-2021.pdf
19. Application of Organic Fertilizer to Increase Growth and Yield of Organic Eggplant (Solanum melongena, L.) in International Journal of Engineering Science Invention (IJESI) 10(9):15-21 (2021, 4^th author). http://www.ijesi.org/papers/Vol(10)i9/Ser-1/B1009011521.pdf
20. Growth and Yield of Soybean on Various Types and Concentrations of Liquid Organic Fertilizer in Ultisols. Journal of Applied Agricultural Science and Technology 5(2):        74-83   (2021,  4^th                                author). https://www.jaast.org/index.php/jaast/article/view/28/10
21. The Growth and Yield of Sweet Corn as Affected by Palm-Oil Sludge and Liquid Organic Fertilizer. American Journal of Multidisciplinary Research & Development (AJMRD) 3(8):15-20 (2021, 4^th author). https://www.ajmrd.com/wp-content/uploads/2021/08/B381520.pdf
22. Compost of Yellow Creeping Daisy (Wedelia Trilobata, L.) Weed to Increase Organic Tomato Yield. International Journal of Current Science Research and Review 4(8):1-8 (2021, 2^nd author). https://ijcsrr.org/wp- content/uploads/2021/08/15-21-2021.pdf
23. Growth and Yield of Onion as Affected by Mulch Types and Vermicompost Proceedings of the 3rd KOBI Congress, International and National Conferences (KOBICINC 2020) Advances in Biological Science Vol 14 p 51-
24. 58 (2021, 4^th author). https://www.atlantis-press.com/proceedings/kobicinc- 20/125958259
25. Effect of Swamp Irrigation Pattern and Sorghum Extract Concentration on Sorghum Seed Sprout. Proceedings of the 3rd KOBI Congress, International and National Conferences (KOBICINC 2020) Advances in Biological Sciences
26. 14 p 19-25 (2021, 5^th author). https://www.atlantis- press.com/proceedings/kobicinc-20/125958183
27. Zinc Amendment Decreased Nutrient Contents of Liquid Organic Fertilizer. Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD) Vo. 13 (2021, 2^nd author). https://www.atlantis-press.com/proceedings/isplrsad-20/125957699
28. Adaptation of 13 Sweet Corn Genotypes in Coastal Lands Under Drought Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD) Vol 13. (2021, 6^th author). https://www.atlantis-press.com/proceedings/isplrsad- 20/125957670
29. Weed growth and sweet corn yield as affected by planting patterns and mulch types in organic farming IOP Conference Series: Earth and Environmental Science Vol 694, 012019 (2021, 5^th author). https://iopscience.iop.org/article/10.1088/1755-1315/694/1/012019/pdf
30. Sorghum germination inhibition using its water extract cultivated in swampland with different irrigation IOP Conference Series: Earth and Environmental Science 694, 012027 (2021, 5^th author). https://iopscience.iop.org/article/10.1088/1755-1315/694/1/012027/pdf
31. Growth and yield of sweet corn (Zea mays Saccharata) as affected by incubation time of preparation for tithonia (Tithonia diversifolia) enriched liquid organic fertilizer. IOP Conference Series: Earth and Environmental Science Vol               694                   (2021,         4^th           author). https://iopscience.iop.org/article/10.1088/1755-1315/637/1/012090/pdf
32. Water hyacinth-based liquid organic fertilizer increased growth and yields of organically grown cucumber. International Journal of Ag. And Env. Research 6(6): 843-852 (2020, 2^nd author). https://ijaer.in/2020files/ijaer_06 pdf
33. Quality of enriched liquid organic fertilizer from dairy cattle wastes for closed agriculture system. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 10(4): 1682-1687 (2020, 1^st author). DOI:10.18517/ijaseit.10.4.5068
34. Perception and strategies for development of organic farming in North Bengkulu Naturalis 9(1): 127-137 (2020, 2^nd author), Indonesian. https://ejournal.unib.ac.id/index.php/naturalis/article/view/12237/pdf
35. Soil surface carbon emission in various land use in tropical region (South Bengkulu District). Naturalis 9(1): 55-65 (2020, 2^nd author), https://ejournal.unib.ac.id/index.php/naturalis/article/view/12231
36. Phosphorus availability as affected by the application of organic amendments in Ultisols. Sains Tanah: Journal of Soil Science and Agroclimatology 17(1): 16-22 (2020,     1^st        author). https://jurnal.uns.ac.id/tanah/article/view/41284/27486
37. Performances and genetic parameters estimation of yield and yield related traits in sweet corn inbred lines selected for better adaptation to organic cropping International Journal of Advanced Science Engineering Information Technology (IJASEIT) 10(3): 1252-1257 (2020, 3^rd author). http://insightsociety.org/ojaseit/index.php/ijaseit/article/view/2558
38. Nutrient properties of tithonia-enriched liquid 0rganic fertilizer as affected by different types of animal feces and its effects on fresh weight of loose-leaf lettuce (Lactuva sativa ). International Journal of Advanced Science Engineering Information Technology (IJASEIT) 10(2): 730-735 (2020, 2^nd author). http://insightsociety.org/ojaseit/index.php/ijaseit/article/view/4748
39. Shifting and dominance of weed species following solarization treatment under organic farming system in tropical highland . International Journal of Agricultural Technology     (IJAT) 16(2):   393-402                       (2020,             3^rd           author). http://www.ijat- com/pdf/v16_n2_2020_March/15_IJAT_16(2)_2020_Setyowati,%20N.
40. .pdf
41. Phosphorus Uptakes and Yields of Sweet Corn Grown under Organic Production Proceeding IOP Conference Series: Earth and Environmental  Science        347 012006 (2019, 2^nd author). https://iopscience.iop.org/article/10.1088/1755-1315/347/1/012006/pdf
42. Variability in growth and yield among sweet corn genotypes grown under organic crop Proceeding IOP Conference Series: Earth and Environmental  Science 347     012007.            (2019, 3^rd author). https://iopscience.iop.org/article/10.1088/1755-1315/347/1/012007/pdf
43. Weed inhibition and sorghum yield as affected by organic mulch in tropical coastal environment. International Journal of Agricultural Technology (IJAT) 15(6): 891-900. (2019, 4^th author). http://www.ijat- com/pdf/v15_n6_2019_November/8_IJAT_15(6)_2019_Harsono,%20P
44. ..pdf
45. Comparative effects of soil and foliar application tithonia-enriched liquid organic fertilizer on yields of sweet corn in closed agriculture production Agrivita 41(2):238-245. (2019, 2^nd author). https://agrivita.ub.ac.id/index.php/agrivita/article/view/1256/1099
46. Yield performance of potato (Solanum tuberosum ) as amended with liquid organic fertilizer and vermicompost. International Journal of Agricultural Technology (IJAT) 15(6): 869-878.. (2019, 5^th author). http://www.ijat- aatsea.com/pdf/v15_n6_2019_November/6_IJAT_15(6)_2019_Fahrurrozi,%2 0F..pdf
47. CO2 emission and accumulation of organic matter under sweet corn stand in the long term organically managed International Journal of Agricultural Technology (IJAT) 15(6): 975-986 (2019, 1^st author). http://www.ijat- aatsea.com/pdf/v15_n6_2019_November/15_IJAT_15(6)_2019_Muktamar,% 20Z..pdf
48. Perception of coal mining employee at PT Firman Naturalis 8(1): 9-14. (2019, 3^rd        author),                                     Indonesian. https://ejournal.unib.ac.id/index.php/naturalis/article/view/9157/4489
49. Enhancing soil chemical properties and sweet corn growth by solid organic amendments in Ultisol. Terra, Journal of Land Restoration 2(1): 1-8. (2019, Corresponding author).
50. https://ejournal.unib.ac.id/index.php/terrajournal/article/view/7404/pdf
51. Hybrid performances and heterosis in sweet corn as grown under organic crop management in tropical highland International Journal of Agricultural Technology (IJAT) 14(6): 815-832. (2018, 5^th author). http://www.ijat- aatsea.com/pdf/v14_n6_2018_%20November/1_IJAT_14(6)_2018_Chozin,% 20M..pdf
52. Relationships between potassium uptakes and yield performances of sweet corn grown under organic International Journal of Agricultural Technology (IJAT) 14(7): 1171-1180. (2018, 2^nd author). http://www.ijat- aatsea.com/pdf/v14_n7_2018_%20December/18_IJAT_14(7)_2018_Fahrurro zi,%20F..pdf
53. Residual effect of vermicompost on sweet corn growth and selected chemical properties of soils from different organic farming International Journal of Agricultural Technology (IJAT) 14(7): 1471-1482. (2018, 1^st author). http://www.ijat-
54. aatsea.com/pdf/v14_n7_2018_%20December/45_IJAT_14(7)_2018_Muktama r,%20Z.,.pdf
55. Growth and yield responses of cauliflower on tithonia (Tithonia diversifolia) compost under organic farming practices. International Journal of Agricultural Technology (IJAT) 14(7): 1905-1914 (2018, 3th author). http://www.ijat- com/pdf/v14_n7_2018_%20December/82_IJAT_14(7)_2018_Setyowat i,%20N..pdf
56. Changes in chemical properties of soil in an organic agriculture Proceeding IOP Conf. Series: Earth and Environmental Science Vol 215 012016. (2018, 2^nd author). https://iopscience.iop.org/article/10.1088/1755- 1315/215/1/012016/pdf
57. Improvement of Selected Soil Chemical Properties and Potassium Uptake by Mung Beans after Application of Liquid Organic Fertilizer. Terra, Journal of Land Restoration 1(1): 1-7. (2018, corresponding author). https://ejournal.unib.ac.id/index.php/terrajournal/article/view/4123/pdf_1
58. Determination of potential bacteria from five different types of green biomass enriched liquid organic fertilizer for developing Bio-decomposer. International Journal of Agricultural Technology (IJAT) 13(7.1): 1175-1182 (2017, 4^th author). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_1_2017_D ecember/18_IJAT_13(7.1)_2017_Bambang%20Purnomo_Microbial%20Biote chnology,%20Biodiversity,Taxonomy,%20Biological%20Activity.pdf
59. Soil solarization with colored plastic mulches influenced weed growth and soil temperature in tropical International Journal of Agricultural Technology (IJAT)   13(7.2):            2053-2063.                          (2017,       4^th               author). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_D ecember/47_IJAT_13(7.2)_2017_Setyowati%20N._Socio%20Economic,%20 Community%20Development%20and%20Agricultural%20Development.pdf
60. Soil chemical improvement under application of liquid organic fertilizer in closed agriculture system. International Journal of Agricultural Technology (IJAT) 13(7.2):   1715-1727.         (2017,  1^st                       author). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_D
61. ecember/19_IJAT_13(7.2)_2017_Muktamar%20Zainal_Environmental%20Sc ience,%20Soil%20and%20Water%20Conservation.pdf
62. Sweet corn performance and its major nutrient uptake following application of vermicompost supplemented with liquid organic International Journal of Advanced Science Engineering Information Technology (IJASEIT) 7(2): 602-608. (2017, 1^st author). http://dx.doi.org/10.18517/ijaseit.7.2.1112
63. Identification of nutrient contents in six potential green biomasses for developing liquid organic fertilizer in closed agricultural production system. International Journal on Advance Science Engineering Information Technology 7(2):                  559-565.        (2017,      3^rd           author). http://dx.doi.org/10.18517/ijaseit.7.2.1889
64. Change in selected soil chemical properties of Ultisols and the growth of sweet corn (Zea Mays Saccharata Sturt L) as affected by the application of organic and nitrogen fertilizers. Proceeding of National Seminar and Annual Meeting of Agricultural institution Deans, Network of State Universities in the western Indonesia pp: 400-407.(2017, corresponding author), https://www.researchgate.net/publication/338864568_Prosiding_BKS_PTN_U BB_2017_di_Bangka_Belitung
65. Analysis of traits association in sweet corn inbred lines as grown under organic cropping Sabro Journal of Breeding and Genetics 49(4):361-367. (2017, 5^th        author).                             http://sabraojournal.org/wp- content/uploads/2017/12/SABRAO-J-Breed-Genet-49-4-361-367-Chozin.pdf
66. Weed inhibition under solarization treatment with different mulch color in tropical highland organic farming system. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 7(5): 1894-1899. (2017, 3^rd author). http://dx.doi.org/10.18517/ijaseit.7.5.1847
67. Combined ability of cob characteristics of sweet corn inbreed in organic farming J. Hort. Indonesia 8(1): 48-58 (2017, 5^th author)), Indonesian. https://journal.ipb.ac.id/index.php/jhi/article/view/17490/12550
68. Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth (Eichornia crassipes) Compost. International Journal of Agricultural Technology (IJAT) 12(7.1): 1715-1727 (2017, 1^st author). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_D ecember/19_IJAT_13(7.2)_2017_Muktamar%20Zainal_Environmental%20Sc ience,%20Soil%20and%20Water%20Conservation.pdf
69. Variability evaluation of yield and yield component S5 for development of variety adaptive to organic farming system . Proceeding of National Seminar conducted by PERIPI Chapter Riau pp. 63-70 (2016, 5^th author), Indonesian. https://www.researchgate.net/publication/326123402_EVALUASI_VARIABI LITAS_KOMPONEN_HASIL_DAN_HASIL_JAGUNG_MANIS_GENERA SI_S5_UNTUK_PENGEMBANGAN_VARIETAS_YANG_BERADAPTASI
70. _BAIK_PADA_SISTEM_BUDIDAYA_ORGANIK
71. Reduction of Syntehtic Fertilizer for Sustainable Agriculture: Influence of Organic and Nitrogen Fertilizer Combination on Growth and Yield of Green International Journal of Advanced Science Engineering Information Technology (IJASEIT) 6(3): 361-364. (2016, 1^st author). http://dx.doi.org/10.18517/ijaseit.6.3.802
72. Selected Macronutrients’ Uptake by Sweet Corn Under Different Rates of of Liquid Organic Fertilizer in Closed Agriculture International Journal
73. of Advanced Science Engineering Information Technology (IJASEIT) 6(2): 258-261. (2016, 1^st author). http://dx.doi.org/10.18517/ijaseit.6.2.749
74. Growth and Yield Responses of Three Sweet-Corn (Zea mays var. Saccharata) Varieties to Local-based Liquid Organic Fertilizer. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 6(3): 319-321. (2016, 2^nd author). http://dx.doi.org/10.18517/ijaseit.6.3.730
75. Column Study of Nitrate Downward Movement and Selected Soil Chemical Properties’ Changes in Mine Spoiled Soil as Influenced by Liquid Organic International Journal of Agricultural Technology (IJAT) 11(8): 2017- 2027. (2015,                        1^st           author). http://www.aatsea.org/images/conference_publications/pdf/v11_n8_15_Dece mberSpecialissue/041%20-%20Muktamar%20et%20al.%20-S3.pdf
76. Evaluation of Tithonia-enriched Liquid Organic Fertilizer for Organic Carrot International Journal of Agricultural Technology (IJAT) 11(8): 1705-1712. (2015,     2^nd        author). http://www.aatsea.org/images/conference_publications/pdf/v11_n8_15_Dece mberSpecialissue/008%20-%20Fahrurrozi-S1.pdf
77. Weed Based   Organic    Fertilizer    to    Reduce   Application    of   Synthetic Fertilizer in Mustard (Brasiccasinensis ). International Journal of Agricultural Technology (IJAT)                   11(8):   1677-1683.                 (2015,      2^nd                    author). http://www.aatsea.org/images/conference_publications/pdf/v11_n8_15_Dece mberSpecialissue/004%20-%20N.%20Setyowati%20-S1.pdf
78. Growth and yield of chili pepper under different time application of wedelia (Wedelia triobata) and Siam weed (Chromolaena odorata) organic fertilizers. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 4(6): 401-404. (2014, 2^nd author). http://dx.doi.org/10.18517/ijaseit.4.6.444
79. Growth and yield of chili pepper as affected by weed based organic compost and nitrogen fertilizer. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 4(2): 121-124. (2014, 2^nd author). http://dx.doi.org/10.18517/ijaseit.4.2.382