Zainal Muktamar

Zainal Muktamar

PROFESSOR

Department of Soil Science

Soil Chemistry/ Fertility Assessment ; Closed Agricultural Production System; Plant Nutrition Management

EDUCATION

University of Kentucky, Lexington, USA

1989-1992

PhD degree in Soil Chemistry

 

University of Kentucky, Lexington, USA

1986-1989

Master’s degree in Soil Chemistry

 

Gajah Mada University, Yogyakarta, Indonesia

1978 – 1983

Bachelor’s degree in Soil Science

 

WORKING EXPERIENCE

University of Bengkulu

Lecturer 1984 – now

teaching, research, and community development

 

Doctoral Program for Agriculture Sciences, Faculty of Agriculture

Coordinator (2019-2021)

 

University 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) projects, 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 Board for higher Education

Study Assessor Program (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 English 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 boards, Directorate General of higher education, Ministry of Education and Culture

New higher Education Reviewers (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 Agriculture 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
  1. Soil Chemistry/Fertility Assessment
  2. Closed Agricultural Production System
  3. 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, leaders)
  3. The Development of superior solid and liquid organic fertilizer to enhance soil quality in highland closed agriculture systems (2017-2019, leader)
  4. Enriched liquid organic fertilizer with Zn micronutrient 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, leaders)
  8. Preliminary evaluation of inbreed sweet corn yield to breed adaptive variety to highland organic environment (2016, members)
  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 vegetables farmer health Rejang Lebong District (2011, member)

 

PUBLICATION BOOK

1 . Paraquat Adsorption on Humid Tropical SoilsAdsorption (2015) Indonesian.https://www.researchgate.net/publication/299440814_Adsorption_Herbicide Paraquat_on_Tropical_Land Wet

 

JOURNALS AND PROCEEDINGS
  1. The application of compost and Ca( OH)2 to overcome Cadmium (CD) in contamination Inceptisols . 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 years authors). https://www.ajmrd.com/wp-content/uploads/2022/03/D432532.pdf _
  3. Soil nitrate availability US influenced by the application of vermicompost supplemented with a liquid organic fertilizer. IJAT 18(1): 281-292. (2022, 1 st authors). http://www.ijat com/pdf/v18_n1_2022_January/20_IJAT_18(1)_2022_Muktamar,%20 Z.(12).pdf
  4. Vermicompost and Biourine Doses Effect on Soil pH, Shallot Growth, and Yield in Ultisol . American Journal of Multidisciplinary Research & Development (AJMRD) 3(9):44-53 (2021, 4 years authors). https://www.ajmrd. com/vol-3-issue-9/
  5. Vermicompost Buffering Capacity to Reduce Acidification of Pb and CD Contaminated Inceptisols and Entisols . Journal of Tropical Soils 26(1):1-9 (2021 1 st authors). https://journal.unila.ac.id/index.php/tropicalsoil/article/view /423
  6. Nitrogen, phosphorous, and potassium uptakes of organically grown sweet corn on coastal Entisols . International Journal of Agriculture Technology (IJAT) Vol 17(1):213-226(2021,1st author        ). http://www.ijat- com/pdf/v17_n1_2021_January/16_IJAT_17(1)_2021_Congress,%20 Z..pdf
  7. Soil Organic Carbon in Forest and Other Land Use Types at Bengkulu City, Journal Management Forest tropical , 27(3): 184-192 (2021, 2nd _ authors). https://journal.ipb.ac.id/index.php/jmht/article/view/35727/22576
  8. Leek ( Allium fistulosum , ) Growth and Yield US Affected by Cow Manure and Guava Waste Liquid Organic Fertilizer. Agro Bali: Agriculture Journal 4(3):305-313 (2021, 4th author ). https://ejournal.unipas.ac.id/index.php/Agro/article/view/732
  9. Urban farmer perception on organic vegetable farming in the City of Bengkulu (Case study on Melati Farmer Group in Kandang Lemon Village). pulpit Agribusiness : Journal Scientific Society Thought insightful Agribusiness 7(1): 223-232 (2021, 3rd author ), https://jurnal.unigal.ac.id/index.php/mimbaragribisnis/article/view/4482/pdf _ _
  10. Long beans responses on the application of Ageratum conyzoides based liquid organic fertilizers. Proceedings of National Seminar at 45 th Anniversary of Eleven March University 5(1):234-244 (2021, 4 years authors), https://jurnal.fp.uns.ac.id/index.php/semnas/article/view/1779/1153
  11. Germination inhibition of sorghum (Sorghum bicolor ) US affected by its play plant and ratoon cultivated in swamp land. Proceedings of 9 th National Seminar on Suboptimal land pp. 426-434. (2021, 5 years authors), Indonesian. http://conference.unsri.ac.id/index.php/lahansuboptimal/article/viewFile/2422/ 1373
  12. Soil Properties Variability Under Various Agroecosystems In Ultisols of Terra Journal of Land Restoration 4(2):53-59 (2021, 3rd author). https://ejournal.unib.ac.id/index.php/terrahournal/article/view/19643/9060
  13. Allelopathic effect of sorghum root extract and its potential use US a International Journal of Agriculture Technology (IJAT) 17(6):2317-2332 (2021.5 th         author) . http://www.ijat aatsea.com/pdf/v17_n 6_2021 November /20 IJAT17(6)2021_Setyowati,%2 0N.(13).pdf
  14. The inhibition of seeds germination treated with water extract of sorghum (Sorghum bicolor, ) cultivated in histosols. International Journal of Agriculture Technology ( IJAT) 17 (6): 2385-2402 (2021, 5 years authors). http://www.ijataatsea.com/pdf/v17_n6_2021_November/25_IJAT_17(6)_2021_Susilo,%20E. (15).pdf
  15. 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 years authors), Indonesian. http://www.conference.unsri.ac.id/index.php/lahansuboptimal/article/viewFile/ 2426/1384
  16. 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 years old authors). https://ijcsrr.org/wp- content/uploads/2021/11/04-06-2021.pdf
  17. Application of Organic Fertilizer to Increase Growth and Yield of Organic Eggplant (So lanum howling, ) in Ultisols . International Journal of Engineering Science Invention (IJESI) 10(9):15-21 (2021, 4 years authors).http://www.ijesi.org/papers/Vol(10)i9/Ser1/B1009011521.pdf
  18. 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
  19. 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 years authors). https://www.ajmrd.com/wp-content/uploads/2021/08/B381520.pdf
  20. 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, 2nd _ authors). https://ijcsrr.org/wp- content/uploads/2021/08/15-21-2021.pdf
  21. 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 51-58 (2021, 4 years authors). https://www.atlantis-press.com/proceedings/kobicinc- 20/125958259
  22. Effect of Swamp Irrigation Pattern and Sorghum Extract Concentration on Sorghum Seed Sprouts. Proceedings of the 3rd KOBI Congress, International and National Conferences (KOBICINC 2020) Advances in Biological Sciences

14 p19-25 (2021, 5 years authors). https://www.atlantis- press.com/proceedings/kobicinc-20/125958183

  1. 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, 2nd _ authors). https://www.atlantis-press.com/proceedings/isplrsad-20/125957699
  2. 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 years old authors). https://www.atlantis-press.com/proceedings/isplrsad- 20/125957670
  3. 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 years authors). https://iopscience.iop.org/article/10.1088/17551315/694/1/012019/pdf
  4. Sorghum germination inhibition using its water extract cultivated in swampland with different irrigation IOP Conference Series: Earth and Environmental Science 694, 012027 (2021, 5 years authors). https://iopscience.iop.org/article/10.1088/17551315/694/1/012027/pdf
  5. Growth and yield of sweet corn ( Zea mays Saccharata ) as affected by incubation time of preparation for tithonia ( Tithonia diversifolia ) enriched liquid organic fertilizers. IOP Conference Series: Earth and Environmental Science Vol694(2021.4 th       author). https://iopscience.iop.org/article/10.1088/17551315/637/1/012090/pdf
  6. 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, 2nd _ authors). https://ijaer.in/2020files/ijaer_06 pdf
  7. Quality of enriched liquid organic fertilizer from dairy cattle wastes for closed agriculture systems. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 10(4): 1682-1687 (2020, 1 st authors). DOI:10.18517/ijaseit.10.4.5068
  8. Perception and strategies for development of organic farming in North Bengkulu Naturalist 9(1): 127-137 (2020, 2nd _ authors), Indonesian.https://ejournal.unib.ac.id/index.php/naturalis/article/view/12237/pdf
  9. Soil surface carbon emission in various land use in tropical region (South Bengkulu District). Naturalist 9(1): 55-65 (2020, 2nd _ authors), https://ejournal.unib.ac.id/index.php/naturalis/article/view/12231
  10. Phosphorus availability as affected by the application of organic amendments in Ultisols . Soil Science: Journal of Soil Science and Agroclimatology 17(1): 16-22 (2020, 1st author            ). https://jurnal.uns.ac.id/tanah/article/view/41284/27486
  11. Performances and genetics 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, 3rd _ authors). http://insightsociety.org/ojaseit/index.php/ijaseit/article/view/2558
  12. Nutrient properties of tithonia-enriched liquid 0organic 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, 2nd _ authors). http://insightsociety.org/ojaseit/index.php/ijaseit/article/view/4748
  13. Shift 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.ijataatsea.com/pdf/v16_n2_2020_March/15_IJAT_16(2)_2020_Setyowati,%20N..pdf
  14. Phosphorus Uptakes and Yields of Sweet Corn Grown under Organic Production Proceeding IOP Conference Series: Earth and Environmental Science 347 012006 (2019, 2nd _ authors). https://iopscience.iop.org/article/10.1088/17551315/347/1/012006/pdf
  15. Variability in growth and yield among sweet corn genotypes grown under organic crop Proceeding IOP Conference Series: Earth and Environmental Science 347 012007.                                        (2019, 3rd _ authors). https://iopscience.iop.org/article/10.1088/1755-1315/347/1/012007/pdf
  16. 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 years authors). http://www.ijatcom/pdf/v15_n6_2019_November/8_IJAT_15(6)_2019_Harsono,%20P.. pdf
  17. Comparative effects of soil and foliar application tithonia-enriched liquid organic fertilizer on yields of sweet corn in closed agricultural production Agrivita 41(2):238-245. (2019, 2nd _ authors). https://agrivita.ub.ac.id/index.php/agrivita/article/view/1256/1099
  18. Yield performance of potatoes ( Solanum tuberosum ) US amended with liquid organic fertilizer and vermicompost. International Journal of Agriculture Technology (IJAT) 15(6): 869-878 .. (2019, 5 years authors).http://www.ijataatsea.com/pdf/v15_n6_2019_November/6_IJAT_15(6)_2019_Fahrurrozi,%2 0F..pdf
  19. CO2 _ emission and accumulation of organic matter under sweet corn stand in the long term organically managed International Journal of Agriculture Technology (IJAT) 15(6): 975-986 (2019, 1 st authors). http://www.ijataatsea.com/pdf/v15_n6_2019_November/15_IJAT_15(6)_2019_Congress,% 20Z..pdf
  20. Perception of coal mining employee at PT Word Ketaun . Naturalist 8(1): 9-14. (2019,3rd author) , Indonesian . https://ejournal.unib.ac.id/index.php/naturalis/article/view/9157/4489
  21. 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). https://ejournal.unib.ac.id/index.php/terrahournal/article/view/7404/pdf
  22. Hybrid performances and heterosis in sweet corn US grown under organic crop management in tropical highland International Journal of Agriculture Technology (IJAT) 14(6): 815-832. (2018, 5 years authors). http://www.ijat- aatsea.com/pdf/v14_n6_2018_%20November/1_IJAT_14(6)_2018_Chozin,% 20M..pdf
  23. Relationships between potassium uptakes and yield performances of sweet corn grown under organic International Journal of Agriculture Technology (IJAT) 14(7): 1171-1180. (2018, 2nd _ authors). http://www.ijat- aatsea.com/pdf/v14_n7_2018_%20December/18_IJAT_14(7)_2018_Fahrurro zi,%20F..pdf
  24. Residual effect of vermicompost on sweet corn growth and selected chemical properties of soils from different organic farming International Journal of Agriculture Technology (IJAT) 14(7): 1471-1482. (2018, 1 st authors). http://www.ijat aatsea.com/pdf/v14_n7_2018_%20December/45_IJAT_14(7)_2018_Muktama r,%20Z.,.pdf
  25. Growth and yield responses of cauliflower on tithonia ( Tithonia diversifolia ) compost under organic farming practices. International Journal of Agriculture Technology (IJAT) 14(7): 1905-1914 (2018, 3th authors).http://www.ijatcom/pdf/v14_n7_2018_%20December/82_IJAT_14(7)_2018_Setyowat i,%20N..pdf
  26. Changes in chemical properties of soil in an organic agriculture Proceeding IOP conf. Series: Earth and Environmental Science Vol 215 012016. (2018, 2nd _ authors). https://iopscience.iop.org/article/10.1088/17551315/215/1/012016/pdf
  27. 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 authors). https://ejournal.unib.ac.id/index.php/terrahournal/article/view/4123/pdf_1
  28. Determination of potential bacteria from five different types of green biomass enriched liquid organic fertilizer for developing Bio-decomposers. International Journal of Agriculture Technology (IJAT) 13(7.1): 1175-1182 (2017, 4 years authors). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_1_2017_December/18_IJAT_13(7.1)_2017_Bambang%20Purnomo_Microbial%20Biotechnology,%20Biodiversity,Taxonomy,%20Biological%20Activity.pdf
  29. Soil solarization with colored plastic mulches influenced weed growth and soil temperature in tropical International Journal of Agriculture Technology (IJAT)13(7.2):2053-2063.(2017,4 th                   author). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_December/47_IJAT_13(7.2)_2017_Setyowati%20N._Socio%20Economic,%20Community%20Development%20and%20Agricultural%20Development.pdf
  30. Soil chemical improvement under application of liquid organic fertilizer in closed agriculture systems. International Journal of Agricultural Technology (IJAT) 13(7.2):1715-1727.(2017,1st author                ). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_December/19_IJAT_13(7.2)_2017_Muktamar%20Zainal_Environmental%20Sc ience,%20Soil%20and%20Water%20Conservation.pdf
  31. 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, 1st author ). http://dx.doi.org/10.18517/ijaseit.7.2.1112
  32. Identification of nutrients contents in six potential green biomass 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
  33. 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. Proceedings of National Seminar and Annual Meetings of Agricultural institution Deans, Network of State Universities in the western Indonesia pp: 400-407. (2017, corresponding author), Indonesian. https://www.researchgate.net/publication/338864568_Prosiding_BKS_PTN_U BB_2017_di_Bangka_Belitung
  34. Analysis of traits association in sweet corn inbred lines US grown under organic cropping Sabro Journal of Breeding and genetics 49(4):361-367. (2017, 5th author ). http://sabraojournal.org/wp content/uploads/2017/12/SABRAO-J-Breed-Genet-49-4-361-367-Chozin.pdf
  35. 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, 3rd _ authors). http://dx.doi.org/10.18517/ijaseit.7.5.1847
  36. Combined abilities of try characteristics of sweet corn inbreed in organic farming J. Hort. Indonesia 8(1): 48-58 (2017, 5 years authors)), Indonesian.https://journal.ipb.ac.id/index.php/jhi/article/view/17490/12550
  37. Quality Enhancement of Humid Tropical Soils after Application of Water Hyacinth ( Eichornia crassipes ) Compost. International Journal of Agriculture Technology (IJAT) 12(7.1): 1715-1727 (2017, 1 st authors). http://www.aatsea.org/images/conference_publications/pdf/v13_n7_2_2017_December/19_IJAT_13(7.2)_2017_Muktamar%20Zainal_Environmental%20Sc ience,%20Soil%20and%20Water%20Conservation.pdf
  38. Variability evaluation of yield and yield component S5 for development of variety adaptive to organic farming system . Proceedings of National Seminar conducted by PERIPI Chapter Riau pp. 63-70 (2016, 5th author ), Indonesian. https://www.researchgate.net/publication/326123402_EVALUASI_VARIABILITAS_KOMPONEN_HASIL_DAN_HASIL_JAGUNG_MANIS_GENERASI_S5_UNTUK_PENGEMBANGAN_VARIETAS_YANG_BERADAPTASI _BAIK_PADA_SISTEM_BUDIDAYA_ORGANIK
  39. Reduction of Synthetic 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 authors). http://dx.doi.org/10.18517/ijaseit.6.3.802
  40. Selected Macronutrients’ Uptake by Sweet Corn Under Different Rates of Liquid Organic Fertilizer in Closed Agriculture International Journalof Advanced Science Engineering Information Technology (IJASEIT) 6(2): 258-261. (2016, 1 st authors). http://dx.doi.org/10.18517/ijaseit.6.2.749
  41. 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, 2nd _ authors). http://dx.doi.org/10.18517/ijaseit.6.3.730
  42. Column Study of Nitrate Downward Movement and Selected Soil Chemical Properties’ Changes in Mine Spoiled Soil US Influenced by Liquid Organic International Journal of Agriculture Technology (IJAT) 11(8): 2017- 2027. (2015, 1st author          ). http://www.aatsea.org/images/conference_publications/pdf/v11_n8_15_December Special issue /041%20-%20Muktamar%20et%20al.%20-S3.pdf
  43. Evaluation of Tithonia-enriched Liquid Organic Fertilizer for Organic Carrot International Journal of Agriculture Technology (IJAT) 11(8): 1705-1712. (2015, 2nd author      ). http://www.aatsea.org/images/conference_publications/pdf/v11_n8 _15_Dece mberSpecialissue /008%20-%20Fahrurrozi-S1.pdf
  44. Weed BasedOrganicFertilizertoReduceApplication ofSynthetic Fertilizer in Mustard ( Brasiccasinensis ). International Journal of Agriculture Technology          (IJAT)              11(8):1677-1683.(2015,2nd    author). http://www.aatsea.org/images/conference_publications/pdf/v11_n8_15_Dece mberSpecialissue /004%20-%20N.%20Setyowati%20-S1.pdf
  45. 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, 2nd _ authors). http://dx.doi.org/10.18517/ijaseit.4.6.444
  46. Growth and yield of chili pepper as affected by weed based organic compost and nitrogen fertilizers. International Journal of Advanced Science Engineering Information Technology (IJASEIT) 4(2): 121-124. (2014, 2nd _ authors). http://dx.doi.org/10.18517/ijaseit.4.2.382