Bandi Hermawan
Department of Agricultural Cultivation, Bengkulu University, WR. Supratman Street, Bengkulu, 38178, Indonesia

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Effect of Incubation of Goat Manure on Growth and Yield of Sweet Corn Saputra, Dedi; Handajaningsih, Merakati; Hermawan, Bandi
Akta Agrosia Vol 20, No 2 (2017)
Publisher : Faculty of Agriculture, The University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (800.22 KB) | DOI: 10.31186/aa.20.2.43-47

Abstract

ABSTRACTGoat manure is one of organic fertilizers used as the main input in organic farming practice in Indonesia.  Since the slower availability of  nutrient elements to the plants is the characteristic of this manure compared to the other manures, then research on the time of incubation needs to be evaluated.  The study was conducted  in Medan Baru Fields Experiment, district Muara Bangkahulu Bengkulu city. Randomized Complete Block Design was arranged for the experiment. Time incubation of goat manure in the field was single factor consisted of  no incubation, 1 week before planting, 2 weeks before planting, 3 weeks before planting, and 4 weeks before planting.  As much as 20 tons/ha  of  goat manure was incorporated in the field, no additional inorganic fertilizer was applied on sweet corn plants var. Bonanza F1.  The sweetcorn plants responded better growth to treatment 4 weeks incubation of goat manure compared to treatment of no incubation. Yet incubation time of goat manure showed no  significant effects on sweet corn yieldKeywords: incubation,goat manure, sweet corn, growth, yield 
DAMPAK SISTEM OLAH TANAH DAN MULSA TANDAN KOSONG KELAPA SAWIT TERHADAP PERTUMBUHAN, HASIL JAGUNG MANIS (Zea mays saccharata) DAN TATA AIR TANAH Situmorang, Andreas Junico Marulitua; Hermawan, Bandi; Pujiwati, Hesti
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 21, No 2 (2019)
Publisher : Program Studi Ilmu Tanah Fakultas Pertanian UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.21.2.68-74

Abstract

[IMPACT OF THE TILLAGE SYSTEM AND OIL PALM EMPTY FRUIT BUNCH MULCH ON GROWTH, YIELD OF SWEET CORN (Zea mays saccharata) AND GROUNDWATER SYSTEM].  This study aims to determine the impact of land management and the use of oil palm empty fruit bunches (TKKS) mulch. This research was conducted from August to October 2018, arranged in a split plot design with two factors. As a first factor, land management consists of unprocessed, plowed, and plowed and harrowed. The treatment of oil palm empty fruit bunches mulch as the second factor consisted of no mulch, 9 tonnes/ha of mulch, 12 tonnes/ha of mulch, and 15 tonnes/ha of mulch. Plant variables observed consisted of plant height, stem diameter, number of leaves, fresh plant weight, plant dry, ear weight, ear length, ear diameter. Soil variables observed were the redistribution of groundwater and infiltration. The results showed no significant interaction between the tillage system and the application of oil palm empty fruit bunch mulch on all observed variables. Treatment without tillage or mulch dose of 12 tons/ha can provide growth and yield of sweet corn plants better than other treatments. The highest water content and infiltration rate were obtained from the dosage of oil palm empty bunches mulch 15 tons/ha. Soil cultivation by plowing and harrowing produces the highest infiltration rate compared to lower tillage intensities. About 18% to 42% of the diversity of growth and yield of sweet corn plants have a significant relationship with the diversity of groundwater.
PENATAAN MANAJEMEN SUPLAI BAHAN BAKU KOPI UNTUK KELANGSUNGAN USAHA KOPI BUBUK DI KECAMATAN MUARA SAHUNG Romdhon, M Mustopa; Hermawan, Bandi; ., Alnopri
DHARMA RAFLESIA Vol 12, No 2 (2014): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v2i12.3426

Abstract

Production of coffee beans in the weekly market reaches 95 tons per week. The main problem faced by the business group is the limited availability of raw materials ofselectively red coffee beans. This is because the coffee harvest only occurs in April toAugust, so that outside these months the raw materials are not available. Therefore, thestudy of the raw material supply management and ground coffee marketing managementarrangement that continuous ground coffee business needs to be done. Descriptiveresearch is conducted in this study, in order to describe in detail the actual situation. Datawas obtained from the results of in-depth interviews (depth interviews), observation, anddocumentation of the farmer and member of the group management. The study revealedthat the availability of raw materials of selectively red coffee beans quotation results isvery limited. Raw material needs can be supplied by local purchases of villages in MuaraSahung or from other coffee production center in the District of Kaur. This effort can beachieved through compliance management raw material supply and marketingmanagement arrangement.Keywords: management, raw materials, coffee powder
Application of a Dielectric Measurement Technique for Calculating Water Loss from Two Texture-contrasting Soils Grown with Upland Rice Hermawan, Bandi; Pajrina, Pajrina; Sumardi, Sumardi; Agustian, Indra
TERRA : Journal of Land Restoration Vol 1, No 1 (2018)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.1.1.8-14

Abstract

Most of the water loss from the soil profile occurred through the evapotranspiration process especially when the plant covers were under maximum growth periods.  This study aimed to apply a technique of measuring a dielectric variable for calculating soil water content and crop water use in the coarse and medium textured soils grown with upland rice.  A couple of wires were inserted into the soil repacked in a 10-kg polybag grown with upland rice, the electrical impedance representing the dielectric value was measured using an instrument called the impedance meter.  The impedance values were converted into the soil water content using a nonlinear regression model of ? = a.ebZ where a and b were constants.  Results showed that the proposed technique of measuring the electrical impedance has successfully been applied to calculate the soil water content and the water use by upland rice grown in loamy sand and sandy loam soils.  Cumulative water loss from loamy sand was about 4 L plant-1 higher for the coarse loamy sand in the first 30 days of a measurement period, but about 10 L plant-1 higher for finer sandy loam on the 90th day of the rice growth period.  Higher biomass of upland rice in the sandy loam soil could increase the evapotranspiration rates and be the main reason for higher water use in this soil.
RANCANG BANGUN PENINGKATAN PRODUKTIVITAS LAHAN SAWAH PADA KAWASAN DAS PADANG GUCI KABUPATEN KAUR Herwan, Herwan; Barchia, M. Faiz; Hermawan, Bandi
Naturalis: Jurnal Penelitian Pengelolaan Sumber Daya Alam dan Lingkungan Vol 1, No 1 (2012)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/naturalis.1.1.5918

Abstract

Beras adalah komoditas strategis karena menjadi makanan pokok  masyarakat Indonesia yang jumlahnya hampir mencapai 240 juta jiwa. Pertumbuhan penduduk yang tidak diimbangi dengan pertumbuhan produksi bahan pangan akan menimbulkan permasalahan pangan. Salah satu upaya yang harus dilakukan untuk mencegah timbulnya masalah ketersediaan pangan adalah mengoptimalkan penggunaan lahan pertanian dengan meningkatkan irigasi pada daerah aliran sungai sehingga indeks pertanaman dapat meningkat. Potensi pengembangan lahan pertanian tanaman pangan padi sawah yang telah dikembangkan di Kabupaten Kaur adalah seluas 7.867 Ha. Teknologi usaha tani dan pengolahan hasil, yaitu peningkatan sistem irigasi, pengelolahan tanah, pemupukan, penggunaan benih unggul, pengendalian hama-penyakit-gulma tanaman, perontokan padi, pengeringan gabah, penggilingan padi, dan lumbung padi harus dikembangkan untuk meningkatkan produktivitas lahan yang selama ini terkategori masih rendah (4,21 ton/ha) dibanding dengan produktivitas padi nasional dan potensi genetik masing-masing varietas yang ditanam pada persawahan di DAS Padang Guci. Fasilitasi peningkatan sarana-prasarana produksi dan pengolahan hasil harus ditingkatkan sesuai dengan rencana pengembangan yang disusun dalam rancang bangun peningkatan produktivitas lahan sawah di DAS Padang Guci. Kata kunci:  rancang bangun, produktivitas padi, DAS Padang Guci
KARAKTERISTIK BIOFISISK DAN SOSIAL EKONOMI YANG MEMPENGARUHI PRODUKTIVITAS LAHAN SAWAH PADA KAWASAN DAERAH ALIRAN SUNGAI PADANG GUCI KABUPATEN KAUR Sari, Dian; Barchia, Faiz; Hermawan, Bandi
Naturalis: Jurnal Penelitian Pengelolaan Sumber Daya Alam dan Lingkungan Vol 1, No 1 (2012)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/naturalis.1.1.5914

Abstract

Pertumbuhan penduduk yang tidak diimbangi dengan pertumbuhan produksi bahan pangan akan menimbulkan permasalahan pangan. Salah satu upaya yang harus dilakukan untuk mencegah timbulnya masalah ketersediaan pangan adalah pemaksimalan penggunaan lahan pertanian, dengan meningkatkan irigasi pada daerah aliran sungai dan diversifikasi pangan sehingga indeks pertanaman pangan akan meningkat.  Penelitian ini dilakukan di empat wilayah kecamatan, yaitu Tanjung Kemuning, Kaur Utara, Padang Guci Hulu, Padang Guci Hilir,  pada Daerah Aliran Sungai Padang Guci,  Kabupaten Kaur.  Tujuan dari penelitian ini adalah untuk mendapatkan data tentang  produktivitas sumberdaya lahan sawah pada Daerah Aliran Sungai Padang Guci Kabupaten Kaur  dan data tentang  tingkat perlakuan usaha tani  padi sawah pada DAS tersebut. Hasil penelitian menunjukkan bahwa masyarakat  di daerah Aliran Sungai Padang Guci sangat tergantung pada lahan sawah,  yang ditunjukan dengan jumlah penduduk yang mayoritas bekerja sebagai petani. Produksi  padi sawah pada Daerah Aliran Sungai Padang Guci belum optimal,  sebagaimana terlihat dari hasil  rata-rata 4,21 ton/ha yang lebih rendah dari potensi hasil yang berkisar  5 ton/ha – 6,59 ton/ha, Karakteristik biofisik yang mempengaruhi produksi padi adalah varietas padi, irigasi   dan   pemupukan, sedangkan  karakteristik sosial ekonomi yang mempengaruhi produksi padi adalah umur petani dan tenaga   kerja. Kata Kunci: Karakteristik, Biofisik, sosial ekonomi, produktivitas lahan sawah.
EFFECTS OF COVER CROPS AND TILLAGE SYSTEMS ON SOIL PHYSICAL PROPERTIES OF COGONGRASS LAND Murcitro, Bambang Gonggo; Hermawan, Bandi; Anggraeni, Dwi
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 7, No 1 (2005)
Publisher : Program Studi Ilmu Tanah Fakultas Pertanian UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.7.1.44-50

Abstract

Amendment of soil physical properties on cogongrass field is required for crop production. Objective of this study was determine the physical properties of the soil that was previously populated by cogongrass as affected by cover crops and tillage systems. A split plot design was used to allocate the combinations of conventional tillage and no-tillage system with 5 species of cover crops. Results showed that the properties of soil physic were not affected by cover crop species. No-tillage resulted in lower bulk density, but higher porosity and organic content, compared to conventional tillage. 
MONITORING KADAR AIR TANAH MELALUI PENGUKURAN SIFAT DIELEKTRIK PADA LAHAN JAGUNG Hermawan, Bandi
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 7, No 1 (2005)
Publisher : Program Studi Ilmu Tanah Fakultas Pertanian UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.7.1.15-22

Abstract

This research aims to monitor soil water content in the field through the measurement of the electrical impedance during the early period of corn growth in the dry season. Two levels of tillage and four types of mulch were arranged at a split plot design with three replications. Part of experiment plot was cultivated twice and the other part was not cultivated. Each main plot was then divided into four sub-plots of 3 x 4 m each of wich was applied with 100% imperata mulch, 80% imperata and 20% kerinyu mulch, 50% imperata and 50% kerinyu, or 100% kerinyu. Two sets of wire, where the lowest 10 cm part was not isolated, were inserted into 10 and 20 cm soil depth therefore they measured the electrical impedance at the 0-10 and 10-20 cm soil layers. The electrical impedance values were measured using the digital ohm-meter that produce the electrical current at frequency of 1 kHz. Results show that the measured electrical impedance values have a very high sensitivity to the fluctuation of soil water content in the field. When calibrated to the same soil, the values can be transformed into water content values. During the measurement period, the cultivated soil is consistently drier at the 0-10 depth and wetter at the 10-20 depth compared to the uncultivated soil. The combination of 50% imperata and 50% kerinyu mulch maintains higher soil water content uring the dry season compared to other combinations. The research suggests that monitoring of soil water content can be conducted directly in the field through the measurement of electrical impedance.
A MODEL TO PREDICT PLANT-AVAILABLE WATER CONTENT OF SOILS AT DIFFERENT LAND UNITS IN BENGKULU, INDONESIA Hermawan, Bandi; Hasaanudin, Hasanudin; Agustian, Indra; Murcitro, Bambang Gonggo
TERRA : Journal of Land Restoration Vol 3, No 1 (2020)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (790.38 KB) | DOI: 10.31186/terra.3.1.10-14

Abstract

Soil water availability to the plants is a very important physical property of soil that controls water and nutrient absorption by the plant.  It is defined as the difference between the maximum amount of water the soil can hold and the minimum condition that the plant can no longer extract water from the soil.  However, soil factors that control the plant available water content (PAWC) in the soil have not been fully understood.  The present study aims to analyze the relations between particle-size distributions and organic carbon with the available water of the soil and to develop a model of predicting PAWC.  Five soil profiles at different land units were described up to the depth of 100 cm.  Ten undisturbed soil samples were taken using the stainless-made core sampler from 10 cm increments for the soil water holding capacity analysis.  A similar number of disturbed samples were also provided from the same depths for soil texture and organic carbon analysis.  Results showed that the variance in PAWC could be explained by sand and clay fractions (R2>0.35) but not by silt and organic carbon contents.  Therefore, we were able to develop a model for the prediction of available water content in the soil from the sand and clay parameters.  The model will help decision-makers be able to propose conservation and management strategies for PAWC in agricultural practices as well as for the soil moisture retention at civil works.
EFFECTS OF ARBUSCULAR MYCORRHIZA FUNGI AND COFFEE PULP COMPOST IN IMPROVING SOIL WATER UPTAKE BY CHILLI AROUND THE PERMANENT WILTING POINT CONDITIONS Dayana, Ingri; Hermawan, Bandi; Bertham, Yudhi Harini; Ganefianti, Dwi Wahyuni
TERRA : Journal of Land Restoration Vol 3, No 1 (2020)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.959 KB) | DOI: 10.31186/terra.3.1.23-26

Abstract

Soil water availability to the plants is a range of water content between the field capacity and the permanent wilting point (PWP) conditions. The PWP is defined as the lower limit of soil water content that the plant can extract water from the soil as indicated by the symptoms of wilting plants. This is because plant roots are unable to penetrate the soil micropores that contain the water.  The study aims to analyze the effects of arbuscular mycorrhizal fungi (AMF) and compost in enhancing soil water absorption by the plant when the water content is close to the permanent wilting point. Four doses of AMF (0, 5, 10 and 15 g.plant-1) and three doses of coffee pulp-made compost (0, 5 and 10 ton.ha-1) were arranged according to a randomized complete block design with three replicates. Results showed that the application of AMF significantly enabled the plant to improve water uptake when the soil water content was about at the permanent wilting point conditions. The AMF addition of 15 g.plant-1 significantly prolonged the growing period of chili to wither and the plant showed the wilting symptoms at the soil water content of 5 to 7% lower than the no-AMF plants. Improved water uptake under water stress conditions was attributed to increases in the root colonization by AMF.