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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Agrohorti Bulletin (e-Journal) Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Pertanian AGRIVITA, Journal of Agricultural Science Jurnal Sains Teh dan Kina Journal of Tropical Crop Science jurnal Ilmu Pertanian (Agricultural Science)
Sofyan Zaman
Department Of Agronomy And Horticulture, Bogor Agricultural University (IPB University), Bogor, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Cocoa Production Stability in Relation to Changing Rainfall and Temperature in East Java, Indonesia Santosa, Edi; Sakti, Ginanjar Pramudya; Fattah, Muhamad Zainul; Zaman, Sofyan; Wahjar, Ade
Journal of Tropical Crop Science Vol 5 No 1 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.195 KB) | DOI: 10.29244/jtcs.5.1.6-17

Abstract

Climate change as indicated by rising temperature and changing rainfall pattern has been known to affect cacao production in many production countries. However, studies on the effects of rainfall and temperature variability on the cacao production are rarely reported in Indonesia. Hence, the objective of this study is to evaluate the stability of cocoa production in relation to rainfall and temperature variability in order to develop sustainable production under climate change scenario. Research was conducted at a state owned company in Jember District, East Java, Indonesia from February to June 2015. Production and climatic data of 2010-2015 were evaluated using simple regression and correlation analysis. Results revealed that productivity fluctuated among months and among years. However, the fluctuation among months (s2 = 117.076) was lower than among years (s2 = 311.225). Rainfall and temperature showed variability among months and among years; and the fluctuation among months was lower in both rainfall and temperature. Rainfall at one to four months before harvest correlated with production (r=0.400-0.671; P= 0.000 to 0.001) and temperature at two to four months before harvest determined cocoa production (r=0.371-0.412; P=0.001-0.003). High monthly cocoa production coincided with decreasing temperature and rainfall for 4 to 5 months during pod development. The presented study implies that both short and long term strategies should be implemented under climatic variability to sustain cocoa production. It is recommended to apply production technology to stabilize micro climate temperature and to minimize the impact of high rainfall such as shade plant and canopy manipulation.
Forage Potential of Plant Species Found in Various Ecosystems in Musi Banyuasin Regency, South Sumatera, Indonesia Kanny, Putri Irene; Chozin, M.A.; Santosa, Edi; Guntoro, Dwi; Zaman, Sofyan; Suwarto, Suwarto; Kurniawati, Ani
Journal of Tropical Crop Science Vol 9 No 01 (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.9.01.68-76

Abstract

Forage is an important component in sustainable smallholder livestock. The purpose of the study was to identify the diversity of natural plant species in various ecosystems, as well as their potential as forage. Based on our surveys of palm oil plantation, rubber plantation, and home gardens using the quadrant method, we identified approximately 50 species comprising the natural vegetation of our study area. Out of 50, we identified 39 broad-leaved species, 9 grasses (Poaceae) species, and 2 sedges (Cyperaceae) species. The palm oil plantation had 29 species dominated by Ottochloa nodosa (11.92%) and Asystasia gangetica (11.40%); 25 species were found in the rubber plantation dominated by Cynodon dactylon (28.42%) and Panicum repens (9.20%), and home gardens contained 30 species dominated by Eleusine indica (13.39%) and Ageratum conyzoides (9.60%). Among the 29 species found in the palm oil plantation, 13 were observed to have low palatability scores, and 16 species have high palatability scores. Based on their high palatability scores, the following species can be utilized as forage for Balinese cattle: Cyrtococcum acrescens, Eleusine indica, Centrosema pubescens, Paspalum conjugatum, and Sida rhombifolia.
Simpanan Biji Gulma dalam Tanah di Perkebunan Teh pada Berbagai Tahun Pangkas Edi Santosa; Sofyan Zaman; Intan Dewi Puspitasari
Indonesian Journal of Agronomy Vol. 37 No. 1 (2009): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (65.257 KB) | DOI: 10.24831/jai.v37i1.1394

Abstract

Through understanding on seed bank, tea plantation manager enables to plan better weed control. The objective of the study was to identify seed bank of weeds at different ages of tea plantation after prunning. The study was conducted at Perkebunan Teh Tambaksari, Subang, Indonesia. Soil samples were collected from tea field of different pruning years (TP0-2 months after pruning, TP1-16 months after pruning, TP2- 28 months after pruning, and TP3-40 months after pruning) and then watered regularly and exposed to direct sunshine to stimulate propagule germination. Results showed that seed banks were found in all soil samples, indicated that effectiveness of weed control was low. The highest seed bank was found at TP1. Most seed bank was seed, they were Ageratum conyzoides which dominated field of TP0 (SDR 36.58%), TP1 (35.90%), TP2 (41.79%) and TP3 (24.82%), followed by Borreria latifolia with SDR values were 19.50%, 27.26%, 29.40% and 16.14%, respectively. Some species stored both vegetative and generative propagules such as Cyperus sp. and Cyperus cyperoides with SDR value 20.33 % only dominated at age of TP0. Seed bank at area of TP1 and TP2 had high value of community coefficient, i.e., 77.22%, showed both fields had high similarity. This finding implies that effective weed control increases when the control is conducted before the weeds bear seed, where mostly less than 45 days after emergence. Furthermore, thirteen weeds had no seed bank in the field, indicates that weed problem in tea plantation was composed of seed bank and weed propagules from other sites.   Key words:  Pruning year, seed bank, tea plantation, weed control
PENGARUH KONSENTRASI DAN SELANG WAKTU PEMBERIAN EFFECTIVE MICROORGANISMS 4 (EM-4) TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KAPAS (Gossypium hirsutum L.) Moh. Amri Arsyid; M. A. Chozin; Sofyan Zaman
Indonesian Journal of Agronomy Vol. 26 No. 1 (1998): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1641.035 KB) | DOI: 10.24831/jai.v26i1.1592

Abstract

The objective of this experiment is to study the effect of concentration and application interval of EM4 on growth and yield of cotton. The experiment was held in KP Sindangbarang Bogor from March to August 1996, using RCD with two factors and three replications. The first factor was EM4 concentration which were 0 ml L-1  water, 5 ml L-1  water, 10 ml L-1  water, 15 ml L-1  water, and 20 ml L-1  water. The second factor was application interval which were 5, 10, and 15 days. The result shows that the concentration of 5 ml L-1  water significantly affected the vegetative growth. But in the contrary, application interval and its interaction do not give the similar effect. The generative growth were significantly affected by concentration and application interval and its interaction. The best combination for maximum cotton yield is in concentration of 5 ml L-1 water and application interval 10 days, and for maximum seeded cotton yield is 5 ml L-1 water and 15 days.
Tree-based Water Footprint Assessment on Established Oil Palm Plantation in North Sumatera, Indonesia Edi Santosa; Indra Mario Stefano; Abdul Gani Gani Tarigan; Ade Wachjar; Sofyan Zaman; and Herdhata Agusta
Indonesian Journal of Agronomy Vol. 46 No. 1 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.473 KB) | DOI: 10.24831/jai.v46i1.13665

Abstract

ABSTRACTIn a long life cycle of oil palm plantation, sustainable water management is mandatory because irrigation is rarely applied. In order to develop water management for sustainable palm oil production, tree-based water footprint of well-established oil palm plantation was assessed. Field data were collected from February to June 2016 in Dolok Ilir managed by PTPN IV, North Sumatera, Indonesia. Additional data were obtained from interviews on the site and the surrounding estates, reports and references. Results showed that water footprint (WF) for production of fresh fruit bunch (FFB) was 510.69 m3 tonne-1 and crude palm oil (CPO) was 517.79 m3 tonne-1. Green, blue and grey water contributed 94.78%, 0.71% and 4.50% in FFB, and 93.48%, 1.66% and 4.85% in CPO productions, respectively. All green WF was calculated basen on actual value of tree evapotranspiration, therefore, the value was mostly lower than other researchs. Low amount of blue water indicates that the oil palm tree in North Sumatera extracts low amount of ground water. On the other hand, grey water for pollution dilution of fertilizers, pesticides and herbicides were high, i.e., 15.15 m3, 4.77 m3, 3.07 m3 tonne-1 FFB, respectively. It implies that reduction of grey water should be implemented in the near future through precission farming.Keywords: CPO, Elaeis guineensis, precission farming, sustainable production, water footprint
Penghambatan Pertumbuhan Gulma Commelina diffusa oleh Pemberian Ekstrak Segar Daun Mikania micrantha Natalia Puteri Widiastuti; Sofyan Zaman; Sudradjat
Indonesian Journal of Agronomy Vol. 48 No. 1 (2020): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.5 KB) | DOI: 10.24831/jai.v48i1.29648

Abstract

Commelina diffusa Burm. F. diketahui telah resisten terhadap beberapa jenis herbisida sehingga alternatif pengendalian gulma tersebut perlu diketahui. Mikania micrantha merupakan salah satu jenis gulma yang mengandung senyawa alelopati yang dapat menekan pertumbuhan tanaman di sekitarnya sehingga berpotensi digunakan sebagai bioherbisida. Penelitian ini bertujuan mengetahui potensi ekstrak daun M. micrantha sebagai bioherbisida untuk menghambat pertumbuhan gulma C. diffusa. Penelitian dilaksanakan di Kebun Percobaan Cikabayan dan Laboratorium Pascapanen, Institut Pertanian Bogor pada bulan April-Juni 2019. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) faktor tunggal yaitu konsentrasi ekstrak daun M. micrantha sebesar 0.00, 0.33, 0.67, 1.00, 1.33, 1.67, dan 2.00 g bobot basah mL-1, dengan 4 ulangan. Aplikasi ekstrak daun M. micrantha mengurangi jumlah daun, meningkatkan skor toksisitas, dan meningkatkan persentase kematian gulma C. diffusa. Hasil penelitian menunjukkan bahwa aplikasi ekstrak daun M. micrantha menekan pertumbuhan daun C. diffusa sampai 2 minggu setelah aplikasi (MSA). Ekstrak daun M. micrantha bersifat toksik bagi pertumbuhan C. diffusa pada 1 MSA dan menyebabkan kematian C. diffusa mulai 10-15 hari setelah aplikasi. Konsentrasi ekstrak daun M. micrantha yang menyebabkan toksisitas pada C. diffusa adalah 1.15 g mL-1. Kata kunci: bioherbisida, gulma, konsentrasi ekstrak, resisten, senyawa alelopati
Jejak Lahan Sistem Pertanian Terpadu Tanaman-Ternak di Kabupaten Bojonegoro, Jawa Timur Sofyan Zaman; Edi Santosa; Panca Dewi Manuhara Karti; Herdhata Agusta; Muladno
Indonesian Journal of Agronomy Vol. 48 No. 2 (2020): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.883 KB) | DOI: 10.24831/jai.v48i2.30581

Abstract

Jejak lahan merupakan salah satu indikator untuk mengukur daya dukung lingkungan suatu sistem pertanian berkelanjutan. Penelitian bertujuan mengevaluasi daya dukung lingkungan sistem pertanian terpadu dan ternak melalui pendekatan jejak lahan dalam rangka membangun usaha pertanian berkelanjutan. Penelitian dilakukan pada Mei-Agustus 2019 di Desa Sekaran, Bojonegoro, Jawa Timur. Data indeks ketersediaan pangan (IKP) dan indeks daya dukung pakan (IDD) diformulasikan dari laporan dan wawancara. Hasil menunjukkan IKP dan IDD tahunan dalam katagori cukup dengan nilai 3.4 dan 7.2. Jejak lahan pangan adalah 143.2 ha dan jejak lahan pakan adalah 759.1 ha yang mencakup jejak lahan pakan asal limbah pertanian tanaman pangan dan hijauan. Nilai jejak lahan total pangan-pakan yakni 759.1 ha lebih rendah daripada luas lahan tersedia untuk kegiatan agronomi yakni 1,574 ha, yang mengindikasikan kecukupan daya dukung lingkungan untuk membangun sistem pertanian berkelanjutan. Namun demikian, pada April-Mei nilai IDD < 1 yang berarti ada keterbatasan pakan untuk mendukung populasi ternak yang ada. Berdasarkan nilai IDD bulanan, populasi sapi pembibitan yang dapat ditopang adalah 713 ekor dan sapi penggemukan sebanyak 24 ekor. Populasi sapi penggemukan dapat ditingkatkan hingga 1,590-2,515 ekor dengan menambah ketersediaan pakan melalui pembuatan silase, penanaman rumput gajah dan tanaman hijauan lain yang tahan kering.
Agroecology and Uses of Galinsoga parviflora as Indigenous Vegetable in Highland of Kuningan, Banjarnegara and Wonosobo, Indonesia Edi Santosa; Sofyan Zaman; Dwi Guntoro; Anas Dinurrohman Susila
Indonesian Journal of Agronomy Vol. 48 No. 3 (2020): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.078 KB) | DOI: 10.24831/jai.v48i3.32800

Abstract

Mondreng (Galinsoga parviflora Cav.) adalah gulma kosmopolitan dan secara tradisional digunakan sebagai sayuran di dataran tinggi Jawa. Penelitian bertujuan mengevaluasi agroekologi dan pemanfaatan G. parviflora sebagai sayuran indigenous di Jawa. Penelitian dilakukan di Kabupaten Kuningan, Banjarnegara, dan Wonosobo dari Juni 2015 hingga Juli 2017. Peta distribusi diambil dari penelusuran lapangan, wawancara, dan studi literatur. Hasil penelitian menunjukkan ada dua spesies Galinsoga berdasarkan daun dan batang, yaitu G. parviflora dan G. quadriradiata. G. parviflora merupakan sayuran di Kabupaten Banjarnegara dan Wonosobo, tetapi tidak di Kabupaten Kuningan. Galinsoga termasuk satu dari 13 jenis sayuran tradisional; pucuk muda dengan bunga dikonsumsi setelah dimasak atau direbus, dan kadang-kadang digunakan sebagai diuretik. Sayuran Galinsoga berkontribusi rendah terhadap rumah tangga, namun peranannya dalam hubungan sosial antar tetangga relatif penting. Perlu dilakukan studi kandungan nutrisi untuk meningkatkan pemanfaatannya. Kata kunci: Asteraceae, Dieng, gulma, jukut saminggu, mondreng
Pengelolaan Gulma Kelapa Sawit (Elaeis guineensis Jacq.) Studi Kasus di Kalimantan Selatan Winda Nufvitarini; Sofyan Zaman; Ahmad Junaedi
Buletin Agrohorti Vol. 4 No. 1 (2016): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.065 KB) | DOI: 10.29244/agrob.v4i1.14997

Abstract

Kegiatan bertujuan untuk mengetahui manajemen pengendalian gulma kelapa sawit. Kegiatan dilaksanakan dari bulan Februari sampai Juni 2011. Pengumpulan data dilakukan di Angsana Estate, Kalimantan Selatan. Metode tidak langsung dengan melakukan studi pustaka berupa literatur dan laporan kebun. Gulma berdaun lebar banyak mendominasi areal perkebunan. Perbandingan nilai koefisien komunitas gulma tiap tahun tanam tidak homogen, nilai C < 75%. Pengendalian gulma dilakukan di dua tempat yaitu di gawangan dan piringan, secara manual dan kimiawi. Pengendalian secara manual dilakukan pada tanaman yang masih muda (TBM) dan TM. Pengendalian secara kimiawi dengan menggunakan herbisida sistemik sesuai dengan pedoman prinsip dan kriteria kebun yang berkelanjutan dengan Block Spraying System (BSS). Tidak semua gulma di ASE dikendalikan, beberapa jenis gulma dipelihara untuk tujuan tertentu (beneficial plant) seperti menjaga kelembaban tanah, meningkatkan bahan organik dan nutrisi dalam tanah serta dapat mengatasi serangan hama. Beneficial plant tersebut antara lain Euphorbia heterophylla, Cassia cobanensis, Antigonon leptopus dan Turnera subulata.
Manajemen Panen Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Hatantiring, Kalimantan Tengah Antonio C Situmorang; Sofyan Zaman; Ahmad Junaedi
Buletin Agrohorti Vol. 4 No. 1 (2016): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.282 KB) | DOI: 10.29244/agrob.v4i1.14999

Abstract

Kegiatan magang memberikan ilmu dan keterampilan dalam budidaya kelapa sawit baik secara teknis maupun manajerial. Kegiatan magang dilaksanakan mulai bulan Februari hingga Juni 2014 di kebun Hatantiring, Kalimantan Tengah. Aspek pemanenan mencakup rotasi panen, taksasi produksi, sistem panen, pengawasan terhadap kehilangan hasil (losses), dan produktivitas. Pengamatan diuji dengan analisis uji t student dan analisis uji LSD. Berdasarkan analisis uji t diketahui bahwa rotasi panen terlambat akan menambah persentase brondolan sehingga peluang kehilangan hasil (losses) juga akan meningkat. Berdasarkan uji LSD pada pemeriksaan losses pertama dan kedua menunjukkan hasil signifikan begitu juga pada pemeriksaan kedua dan ketiga. Hal ini menunjukkan bahwa arahan dan pengawasan mampu meingkatkan kesadaran karyawan panen dalam menekan losses. Peningkatan produksi juga dapat dicapai dengan melakukan sistem panen yang lebih efektif dan efisien. Sistem panen DOL C1R2 dinilai lebih efektif dan efisien dari pada sistem panen DOL C1R1 karena output pemanen mengalami peningkatan. Hal ini berpengaruh terhadap bertambahnya pendapatan karyawan dan pengurangan jumlah karyawan.
Co-Authors Abdul Gani Gani Tarigan Ade Wachjar AHMAD JUNAEDI Anas Dinurrohman Susila Ani Kurniawati Antonio C Situmorang Aslina Putri Nunyai Budi Yadhika Sarjono Dulbari, Dulbari Dwi Guntoro Edi Santosa Eko Sulistyono Fani Fauziah Fattah, Muhamad Zainul Fredinan Yulianda Ghulam Nurul Huda Ghulam Nurul Huda, Ghulam Nurul Gultom, Sandry Hari Prasetyo Hari Prasetyo Herdhata Agusta Indra Mario Stefano Intan Dewi Puspitasari Kanny, Putri Irene M A Chozin M. A. Chozin Moh. Amri Arsyid Muhammad dan Heni Purnamawati Haryadi Danang Faqihhudin Natalia Puteri Widiastuti Nufvitarini, Winda Nugraha, Parid Ridwan Nunyai, Aslina Putri Nurul Afiyah Panca Dewi Manu Hara Karti Parid Ridwan Nugraha Rahayu Novrina Rosa Rosa, Rahayu Novrina Sakti, Ginanjar Pramudya Sandry Gultom Sarjono, Budi Yadhika Simangunsong, Yosua Pratama Situmorang, Antonio C SUDIRMAN YAHYA Sudirman Yahya Sudradjat Sudradjat Supijatno, . Wahjar, Ade Winda Nufvitarini Yonny Koesmaryono Yosua Pratama Simangunsong Yudiwanti Wahyu