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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Hortikultura Indonesia (JHI) Jurnal Manajemen dan Agribisnis Pastura; Journal Of Tropical Forage Science Jurnal Ilmu Lingkungan Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Dinamis Jurnal Keteknikan Pertanian Jurnal Hortikultura Jurnal AgroBiogen Jurnal Penelitian Tanaman Industri Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Dimensi Pratama Teknik Sipil Jurnal Ilmu Ternak Veteriner Jurnal Agro Jurnal Manajemen Sumber Daya Perairan Kultivasi Animal Production : Indonesian Journal of Animal Production The Jurnal Arsip Rekayasa Sipil dan Perencanaan (Journal of Archive in Civil Engineering and Planning) Jurnal Kimia Terapan Indonesia Mesin Jurnal Teknologi & Industri Hasil Pertanian Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Tropical Crop Science EMBRIO : Jurnal Kebidanan EQIEN - JURNAL EKONOMI DAN BISNIS Jurnal Entomologi Indonesia JURNAL ANSIRU PAI : Jurnal Pengembangan Profesi Guru Pendidikan Agama Islam Jurnal Agrium Jurnal Manajemen Bisnis dan Kewirausahaan Jurnal Penelitian Tanaman Industri (Littri) Jurnal Ilmu Manajemen Profitability Berkala Penelitian Hayati INVOICE : JURNAL ILMU AKUNTANSI Proceeding International Seminar of Islamic Studies

Muhamad Achmad Chozin

Department Of Agronomy And Horticulture, Faculty Of Agriculture, IPB University (Bogor Agricultural University), Jl. Meranti, Kampus IPB Dramaga, Bogor 16680, INDONESIA

Author-ID : 247339

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Sulfonylurea Herbicide-Resistant Study on Broadleaf Weeds in The Lowland Rice Production Center in West Java, Indonesia Evar, Fitrawaty Orista; Guntoro, Dwi; Chozin, M. A.; Irianto, M. Yuli
Journal of Tropical Crop Science Vol. 9 No. 02 (2022): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.9.02.137-144

Most rice growers in Indonesia use herbicides for weed control. However, intensive use of herbicides can lead to the weeds to become resistant to the chemicals. The objective of this study was to determine the resistance status of weeds Ludwigia octovalvis, Sphenoclea zeylanica, Monochoria vaginalis in lowland rice in West Java, Indonesia. The study was started by planting three species of weeds, L. octovalvis, S. zeylanica, M. vaginalis, which were then treated with metsulfuron-methyl and penoxsulam herbicides. The study was conducted from January to May 2020 at Cikabayan Experimental Greenhouse, IPB University. The experiment was arranged in a randomized complete block design with four replications. The first factor was the origin of weeds, exposed weeds (Karawang and Subang), and not exposed to herbicides (Bogor); the second factor was the rates of the herbicide, i.e., 0, 2.5, 5, 10, 20, 40, 80 and 160 g. ha-1 for metsulfuron- methyl, and 0, 50, 100, 200, 400, 800, 1600, and 3200 ml.ha-1 for penoxsulam. The results showed that based on the resistance ratio, S. zeylanica and M. vaginalis from Karawang and Subang, and L. octovalvis from Subang, indicated a low resistance to metsulfuron-methyl, L. octovalvis from Karawang was still sensitive to metsulfuron-methyl. L. octovalvis, S. zeylanica, and M. vaginalis from Karawang and Subang were still sensitive to penoxsulam herbicides. This information would be useful to develop a strategy of weed management for important food crops.

Biomulch Treatment Effects on Weed Control and Soil Properties in Cassava Plantation Suwitono, Bayu; Chozin, Muhamad Achmad; Guntoro, Dwi; Suwarto, Suwarto
Journal of Tropical Crop Science Vol. 10 No. 02 (2023): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.10.02.111-123

Legume Cover Crop (LCC) are plants grown as live mulch so that it is beneficial to the agro-ecosystem and can be included in cropping systems to regulate soil fertility and suppress weed growth. This study aims to determine the benefits of using Arachis pintoi as biomulch applied at different times on weed composition and soil fertility. The experiment was carried out at the Teaching farm of IPB, Jonggol, West Java, Indonesia; the soil type is Ultisol. This study used two factors and was designed in a factorial randomized block design. The first factor was four accessions of cassava “Ketan Malang”, “Genjah Bayam”, “IR Jonggol”, and “Manggu”; the second factor is the time of the biomulch planting: 4, 8, and 12 weeks before planting the cassava, at cassava planting, and without biomulch + manual weeding as the control. Weed vegetation was analyzed before land preparation and before cassava harvest. The physical and chemical properties of the soil were analyzed before and after the biomulch treatment. Our study demonstrated that Melastoma malabathricum, Tetracera indica, Oxalis barrelieri, Mimosa invisa, Ottochloa nodosa, Ipomoea sp and Cyperus sp. are the dominant weeds in the cassava plantation. Biomulch planted four and eight weeks before cassava was able to reduce weed dry weight. All biomulch treatments were able to improve soil density and total pore space. Soil with biomulch planted eight weeks before cassava planting had the highest C-organic (7.59%) and total nitrogen (0.41%).

Respon Agronomi Varietas Padi terhadap Periode Kekeringan pada Sistem Sawah Tubur, Herman Wafom; Chozin, Muhamad Achmad; Santosa, Edi; Junaedi, Ahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of this experiment was to identify the growth and production of rice varieties as responses to drought period in low land rice system. Rice plants were grown under plastic house in plots separated by massive walls. Drought periods were treated as main plots, i.e. water was supplied during 3, 6, and 9 weeks after rice transplanting, and control (cultivation without drought treatment). Rice varieties were used as sub plots, consisted of IR64 and Ciherang (low land improved varieties), IPB-3S (new plant type), Menthik Wangi (an aromatic local low land rice), Rokan (a hybrid rice), Way Apo Buru (amphibian type), Jatiluhur and Silugonggo (up land type). Our results showed that drought periods suppressed plant height, tiller number, spikelets length, weight of 1,000 grains, shoot dry weight and harvest index, and increased number of empty spikelets. Interaction between drought periods and rice varieties significantly affected productive tiller number, percentage of plants to flower, and grain weight per hill. Jatiluhur, Ciherang and Way Apo Buru still gave relatively high yields under drought stress indicated that those varieties were relatively tolerant to drought stress; Silugonggo and IPB-3S had medium tolerance to drought stress; IR64, Menthik Wangi and Rokan were the most sensitive varieties. Keywords: drought stress, drought tolerant, improved variety, local variety

Toleransi 20 Genotipe Tanaman Tomat terhadap Naungan Baharuddin, Raisa; Chozin, M A; Syukur, Muhamad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 2 (2014): Jurnal agronomi indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTLow light intensity is a limiting factor in the intercropping system. The aim of this study was to evaluate the production and fruit quality of 20 tomato genotypes under shading condition. This study was conducted at Cikabayan experimental station-University Farm of IPB from January to April 2013. The research was arranged in a nested design with three replicates. The main plot was shading intensity consisted of four levels, i.e., 0, 25, 50, and 75%, while the sub plot was 20 genotypes of tomato. Results of this study showed that the number and weight of fruit per plant under 25% shade were increased for most of the tested genotypes, while under 50% shade showed a high diversity among genotypes. Based on relative production under 50% shade, genotypes can be grouped into four, i.e: sensitive, tolerant, moderate, and shade-ecotype-like genotypes. 50% shade significantly affected total soluble solids and total titrated acid, but did not significantly the firmness of fruit of shade-ecotype-like genotypes.Keywords: intercropping, production, shade, quality

Senyawa Fenol dari Tajuk dan Umbi Teki (Cyperus rotundus L.) pada Berbagai Umur Pertumbuhan serta Pengaruhnya terhadap Perkecambahan Gulma Berdaun Lebar Kusuma, Ayu Vandira Candra; Chozin, Muhammad Ahmad; Guntoro, dan Dwi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 1 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Purple nutsedge (Cyperus rotundus L.) is noxious weed that contains allelochemicals which inhibit other plants germination, thereby it can be potentially used as bioherbicide. Laboratorium experiments were conducted to identify phenol compound in purple nutsedge’s shoot and tuber from three plant ages, and to study its effect on germination of Asystasia gangetica and Borreria alata. First experiment was single factor using descriptive method and the second experiment was arranged in completely randomized design with single factor. The first experiment treatments were shoot and tuber extracts of purple nutsedge from 1, 2, and 3 months after planting. The second experiment treatments were control, shoot, tuber, and all parts extracts of purple nutsedge from 1, 2, and 3 months after planting, with 3 replications. Data from the second experiment was analyzed using F test and followed by Tukey test 5%. Result showed that shoot extracts from 2 months after planting had the highest type of phenol compound namely 2-methoxy-4-vinylphenol; phenol,2,6-dimethoxy; 2-furanmethanol; and α-tocopherol. Tuber extract from 3 months after planting suppressed germination rate of A. gangetica about 54.72%. All parts extracts from 2 months after planting suppressed germination rate of B. alata about 60.98%. Purple nutsedge’s extracts inhibited growth of plumule and radicle of B. alata at 2 days after sowing. This showed that purple nutsedge’s extract gave different effects on different weed species.Keywords: allelochemicals, Asystasia gangetica, bioherbicide, Borreria alata, suppression

Evaluasi Pertumbuhan dan Perkembangan Arachis pintoi sebagai Biomulsa pada Budidaya Tanaman di Lahan Kering Tropis Sumiahadi, Ade; Chozin, M. Achmad; Guntoro, dan Dwi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 44 No. 1 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTCover crops is widely used as biomulch because of its advantages for land conservation, weed control and increasing soil nutrients, especially in upland agriculture. The objective of the research was to study the growth and development of Arachis pintoi as biomulch in upland agriculture. The experiment was carried out at IPB Experimental Field from February until May 2014. Observation was done everyweek up to 12 weeks with 10 plants were used for each observation. One stolon of A. pintoi with 4 internodes was planted in each 0.25 m2 plot. The results showed that root initiation of A. pintoi was occured at 3 weeks after planting (wap) and produced 42.4 roots with average root length of 17.10 cm on 12 wap.A. pintoi had nett assimilation rate of 0.0023 g cm-2 per day and relative growth rate of 0.052 g per day. With this growth rate, A. pintoi covered 58% of 0.25 m2 plot and produced biomass 10.08 g per plant within 12 wap. A. pintoi produced flowers on 4 wap and pods on 7 wap. A. pintoi produced root nodules through mutualism symbiosis with local Rhizobium. The equation for rate of coverage is Coverage (%) = 5.273 Time (wap)-16.512; 100% land coverage can be reached on 22 wap. Based on the results of this study, A. pintoi is potential to be used as biomulch; however, a denser spacing must be applied for faster land coverage.Keywords: land coverage, mulch, Rhizobium, stolon

Identifikasi Senyawa Fenol Beberapa Aksesi Teki (Cyperus rotundus L.) serta Pengaruhnya terhadap Perkecambahan Biji Borreria alata (Aubl.) DC. Dewi, Sangrani Annisa; Chozin, Muhammad Ahmad; Guntoro, dan Dwi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 1 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Purple nutsedge (Cyperus rotundus L.) is one of the important weeds in the world because of its ability to suppress the production of crops and difficult to control. C. rotundus residues can suppress the growth of others weeds. The experiments were conducted to identify the phenolic compound of C. rotundus from six different accessions and to determine the allelopathic effects of C. rotundus extracts on germination of Borreria alata (Aubl.) DC. The identification of phenolic compound was done using extract from all part of mature C. rotundus taken from different accessions and was analyzed using GC-MS. Analysis of C. rotundus extracts on germination of B. alata was designed using completely randomized design with three replications. The treatments were extract of C. rotundus from different accessions (from Cikarawang-Darmaga, Babakan-Darmaga, Ciawi, Megamendung, Cisarua, and Cianjur) with different concentration, 0.75 kg L-1 and 1.5 kg L-1. The result showed that C. rotundus from six accession had phenolic compond with different amounts. Cianjur accesion contained the most phenol content such as 2-furanmethanol; 1,4-benzenediol; 2-methoxy-4-vinylphenol; phenol, 2,6-dimethoxy; syringic acid; and 3-hydroxybenzoic acid. Germination test showed that C. rotundus extracts from different accessions and concentration had the same inhibitory effect on germination of B. alata.Keywords: Allelopathy, bioherbicide, purple nutsedge, weed management

Potensi Gangguan Gulma pada Tiga Sistem Budidaya Padi Sawah Zarwazi, Lalu Muhamad; Chozin, Muhammad Achmad; Guntoro, dan Dwi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 44 No. 2 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTWeeds has become a big problem in system of rice intensification (SRI), integrated crop management (ICM) and conventional cultivation systems. The objective of the research was to study the dominancy and potential of harmful effect of weed in these three cultivation systems. The research was conducted at Sukamandi research station of Indonesian Center for Rice Research, Subang, from November 2013 to April 2014 during rainy season. The experiment was arranged in a split plot design with four replications. The cultivation systems was main plot consisted of system of rice intensification (SRI), integrated crop management (ICM) and conventional system. The weeding techniques as subplot consisted of no weeding, manual weeding, mechanical weeding and chemical weeding. The result showed that based on dry mass of weeds the highest risk of weed was exhibited at SRI with total dry mass of weed 51.53 g m-2 (0.5 ton ha-1) and the lowest was at conventional system with 32.45 g m-2 (0.3 ton ha-1). Proper weed control increased rice production by 28.9% for SRI, by 29.4% for ICM and by 14.6% for conventional cultivation systems. Keywords: dominant, weeding technique, SRI, ICM, conventional system

Pengaruh Konsentrasi Besi dalam Larutan Hara terhadap Gejala Keracunan Besi dan Pertumbuhan Tanaman Padi Noor, Aidi; Lubis, Iskandar; Ghulamahdi, Munif; Chozin, Muhammad Achmad; Anwar, Khairil; Wirnas, Desta
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 2 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Iron (Fe) toxicity is a major constraint in rice production that decreases yield due to high level of soluble Fe. The aims of this experiement were to study the effect of particular Fe concentrations in nutrient solution on rice growth, and to determine Fe concentration in nutrient solution that caused light, moderate, and severe Fe toxiciy symptom. The experiment was conducted in a greenhouse, Bogor Agricultural University from May to July 2010. A randomized block design with two factors and three replications were used in this study. The first factor was Fe concentration in the medium solution (2, 50, 100, 200, 400, 600 ppm Fe), and second factor was rice genotypes (IR64, Margasari). The results showed the higher Fe concentration in the solution resulted in higher scores of iron toxicity symptoms, higher Fe levels in the plant, and caused stunted growth of rice plants. Levels of Fe in a solution of ≥ 200 ppm Fe inhibited plant growth. Iron toxicity symptom in Margasari was lower than the IR64 varieties, especially at concentrations of 200 and 400 ppm. According to the regression equation Y = 0.022X+ 1849, Fe concentration in the solution which caused light Fe toxicity symptom (score ≤ 3) was ≤ 52 ppm Fe, moderate (score = 5) was 143 ppm Fe, heavy (score = 7) was 234 ppm Fe, and severe (score ≥ 9) was ≥ 325 ppm Fe. Keywords: iron toxicity symptoms, iron concentration, rice

Perbandingan Arachis pintoi dengan Jenis Tanaman Penutup Tanah Lain sebagai Biomulsa di Pertanaman Kelapa Sawit Belum Menghasilkan ,, Yuniarti; Chozin, M. Achmad; Guntoro, Dwi; Murtilaksono, dan Kukuh
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 46 No. 2 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Cover crops have the same role as biomulches to maintain soil moisture and reduce the evaporation of soil water. The objective of research was to compare Arachis pintoi versus other cover crops as biomulch in immature oil palm plantations. The study was conducted in the Field of Education and Research Palm IPB-Cargill, Jonggol, Bogor starting in December 2014 until May 2015. The experiment was designed according to a randomized block design with four replications. The treatments were cover crop species (biomulch) i.e. no biomulch/natural vegetation, Arachis pintoi Karp. & Greg., Centrosema pubescens Benth., Calopogonium mucunoides L. and Pueraria javanica Benth. Planting materials used were cutings of A. pintoi and seed of C. pubescens, C. mucunoides and P. javanica. The planting material were planted in plots 9 m x 3 m and plot for biomass 1 m x 1 m. The results showed that the A. pintoi was not significantly different from other biomulches for ground covering and capability to hold water. Soil water content in the treatment of A. pintoi biomulch was not different from other biomulch treatments.

Co-Authors , Handoko ,, Yuniarti . Sugiyanta, . A Ali Abdul Harris Burhan Abdullah Abdullah Ade Sumiahadi Adolf Pieter Lontoh, Adolf Pieter AHMAD JUNAEDI Ahmad Junaidi Ahmad Junaidi Aidi Noor Aji Hermawan Aldi M Alfima Rahasti Alfred A Antoh Alhidayah, Destya Anas Miftah Fauzi Andhini, Martika Ani Kurniawati Ansyarif Khalid Arsa, Agung Jat Wibowo Artha Regina Tambunan Asdi Asdi Asep Nursangaji Asih Sukowati Astuti DA Astuti DA Awang Maharijaya Axel Anderson Azri Kusuma Dewi Bambang Pramudya Bambang S. Purwoko Bilkis, Faras Gaitsa Bustami Syam Chairannisa, Dyana D.A. Astuti Darmawansyah Darmawansyah DARUSMAN, L.K. Darwis AN Darwis AN Desta Wirnas dewi novita Dewi, Sangrani Annisa Dhika Prita Hapsari Diah karyawati Didy Sopandie Dina Harsono Dwi Guntoro Dwiwanti Sulistyowati Dwiwanti Sulistyowati E. Namaken Sembiring Edi Santosa Edy Yusmin Eka Intan Kumala Putri Eka Wardiana Endah Dwi Susanti Endang Gunawan EVA OKTAVIDIATI, EVA Evar, Fitrawaty Orista Fahrul Rozy Pohan Faradesi Ardialisa Fibra Nurainy Gatot Pramuhadi Gerson Hans Maure GHULAMAHDI, M. h sanusi H. Soedarmadi HAJRIAL ASWIDINNOOR Hartami Dewi Hemawati Hemawati Hendrik Hendrik Herman Wafom Tubur Hermanu Triwidodo Hesty Juniar Rukmin Hiroshi Ehara Hiroshi Ehara Hiroshi Ehara Hongarta, Reynaldo HS Arifin Ida H. Somantri Indriani Santoso Iqbal . Irianto, M. Yuli Irwan Abdullah Iskandar Lubis ISMAIL SALEH Iswari S. Dewi Jalali Iqram Kanny, Putri Irene Karti PDMH Karti PDMH Khairil Anwar Krishna Surya Buana Kusuma Darma Kusuma, Ayu Vandira Candra KWANG HO KIM Laila Nur Atika Luki Abdullah M Zardan Araby M. Ghulamahdi Machfud Machfud Maisura Maisura Mansur Maria Erna Marmawi R . Maya Melati Mochammad Afifuddin Moeljarno Djojomartono Muftil Badri Muhamad Kurniadi Muhamad Syukur Muhammad Ridwan Muhammad Syaifuk Ar Rosyid Munawir, Fathurrahman Aziz Munif Ghulamahdi Murtilaksono, dan Kukuh Nurhayati Nurhayati P.M.D.H Karti, P.M.D.H Pangerang, Utama K. Patandean, Brayen Perwita, Atikah Dyah Purwono Purwono Putri Sakura Rainiyati Rainiyati Raisa Baharuddin RANI FARIDA Ratih Marina Kurniaty Rinaldo, Ruswandi Ristianingrum, Anita Ritonga, Arya W Ritonga, Arya Widura Rizki Fadilah Rohman Rosyid, Muhammad Syaiful Ar Sahara, Olyvia Fashatus Sahrullah Sahrullah Selvie D. Anis Siahaan, Gretty Febriola Sigit Prabawa Sobir Sobir Soedarmadi Hardjosoewignyo Soekisman Tjitrosemito Sofiyah, Maratus Sri Mulatsih Sudarsono Sudirman Yahya Sudradjat Sudradjat Sugiyanta Supijatno Suryana Sutikno Sutikno Suwarto Suwarto Suwarto Suwitono, Bayu Tanto Pratondo Utomo Tineke Mandang Trikoesoemaningtyas Ulinnuha, Zulfa urai salam Vitho Alveno Vivid Violin Wenny Rahmawati WIJAYANTO, N. Yasidi, Farid Yudi Febrianto Yudi Febrianto Yuline . Yundari, Yundari Zaman, Sofyan Zarwazi, Lalu Muhamad

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