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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Silvikultur Tropika (JST) Jurnal Hortikultura Pelita Perkebunan Planta Tropika Journal of Tropical Crop Science

Ade Wachjar

Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti Kampus IPB Darmaga, Bogor 16680, Indonesia

Author-ID : 410379

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Energy Environmental Science Social Sciences

Published : 33 Documents Claim Missing Document

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Humic Acid and Biofertilizer Applications Enhanced Pod and Cocoa Bean Production during the Dry Season at Kaliwining Plantation, Jember, East Java, Indonesia Rohman, Fadil; Wachjar, Ade; Santosa, Edi; Abdoellah, Soetanto
Journal of Tropical Crop Science Vol 6 No 03 (2019): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Cocoa (Theobroma cacao L.) is an important crop in Indonesia, but many farmers still face problem in improving bean production. This research aimed to evaluate the effect of humic acid and biofertilizer applications on pod growth and yield of cocoa. The research was conducted at Kaliwining Plantation managed by Indonesian Coffee and Cocoa Research Institute at Jember District, East Java, Indonesia from June 2017 to February 2018. The experiment used mature tree of Sulawesi from one clone. Treatment used were humic acid at level of 0, 1000, 2000, 3000 and 4000 ppm in combination with biofertilizer at level of 0, 500, 1000, 1500 and 2000 ppm that were applied through soil and foliar respectively. Results of this experiment showed that there was an interaction between humic acid and biofertilizer on beans number per plant and photosynthesis rate. Plants treated with 1000 ppm humic acid produced the highest number of small cherelle. Biofertilizer applied at 1500 ppm increased cherelle number, healthy cherelle, number of young pods, number of harvested pods, bean weight per plant and bean yield. The combination of 1000 ppm humic acid and 1500 ppm biofertilizer increased bean production by 39.7%. The high bean production was in line with the high photosynthetic rate. Thus, humic acid and biofertilizer applications could be a way to increase cocoa bean production in this area.

Study of Intercropping System and In Situ Organic Matter Application on Coffee Agroforestry at Citarum Watershed, West Java, Indonesia Kusnendi, Faizal Shofwan; Supijatno, Supijatno; Wachjar, Ade; Hidayat, Yayat; Suseno, Sugeng Heri
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Agroforestry-based coffee is one of the conservation efforts to restore the damages at the Citarum watershed. Planting annual crops between coffee rows could potentially contribute income for the growers during the immature non-productive coffee growth. The aims of the research is to study the effect of various types of agroforestry models in the upstream Citarum watershed on the growth of coffee, and growth and yields of the intercrops. The research was conducted in September 2018 to June 2019 at the upstream Citarum watershed of Tarumajaya Subdistrict Kertasari, Bandung Regency, West Java, Indonesia. The research was arranged with a randomized block design with two factors. The first factor was the cropping system, i.e. coffee monoculture, coffee and corn, coffee and sweet corn, coffee and red beans, and coffee and habanero chili. The second factor was organic matter application, i.e. with and without application of in situ organic matter. The results of the research showed that coffee intercropped with habanero with application of in situ organic matter had the best vegetative growth, indicated by taller plants, more leaves, increased leaf P and Mg levels, and the maximum income from the intercrop. Coffee intercropped with corn with application of in situ organic matter had a maximum corn production but had the lowest income. Therefore, the model of coffee intercropped with habanero chili with application of in situ organic matter was the best model from several intercropping systems tested.

Plant Growth Performance of Top Grafted Young Cacao at Various Elevations in Indonesia Poleuleng, Andi Besse; Agusta, Herdhata; Yahya, Sudirman; Wachjar, Ade; Tjoa, Aiyen
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

The purpose of this study was to evaluate the plant growth performance of top grafted young cacao cultivated in various elevations. This research was conducted from January-August 2019 in South Sulawesi and Central Sulawesi. A total of 54 plants were taken randomly from 6 locations with 3 altitudes (<300, 300-600, >600 meter above sea level, as.). The results showed that there was not significant different of plant height, stem circle, crown circle, the number of primary branches, the number of flowers, the length of horizontal and vertical roots in response to different elevations. However, the height of primary stem and leaves number of cacao from <300 m asl was significantly greater than those from either 300-600 m asl or > 600 m asl. The largest crown portion of actual biomass was found in the branches, then followed by the leaves and stem. While the highest actual root biomass was found at 10-20 cm soil depth.

Water Footprint Analysis of Different Techniques of Cocoa Propagation Santosa, Edi; Supijatno, Supijatno; Wachjar, Ade; Rohman, Fadil; Abdoellah, Soetanto
Journal of Tropical Crop Science Vol. 10 No. 03 (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.10.03.153-165

The nursery phase plays a crucial role in rejuvenating cocoa plantations as it significantly impacts the quality and productivity of the mature trees in the field. However, despite its significance, there remains a lack of understanding regarding its contribution to the water footprint (WF) in cocoa production. This study aims to assess the WF of various propagation techniques to promote sustainable nursery practices. Data on nurseries were collected at the Indonesian Coffee and Cocoa Research Institute in Jember, East Java, Indonesia, from June 2017 to January 2018. The results revealed that propagation accounted for a total WF ranging from 74.28 to 319.41 m3.ha-1 of established cocoa trees, with an average of 186.68 m3. This total WF consisted of 9.02 to 12.89 m3 (7.69%) attributed to seed production and 61.39 to 283.34 m3 (92.30%) attributed to the nursery phase. Among the different nursery techniques studied, the production of true seedlings exhibited the lowest WF, followed by side grafting. To optimize cocoa rejuvenation and minimize WF, it is crucial to carefully select the appropriate nursery technique. Further evaluation is necessary to explore the potential benefits of implementing precision irrigation techniques to reduce WF during the nursery phase. By focusing on sustainable nursery practices, we can enhance the overall sustainability of cocoa production.

Co-Authors , Supiyatno . Sobir . Supriadi . Supriadi, . Abdoellah, Soetanto Achirul Rahman Agung Wahyu Susilo Agung Wahyu Susilo Agung Wahyu Susuilo AHMAD JUNAEDI Aiyen Tjoa Andi Besse Poleuleng Ani Kurniawati Anita Darwis Anita Th. Sinaga Anugrah, Pangeran Teguh Atikah, Nurhati Delima Ragil Kartika Dianto, Fajar Direja, Wahyu Angga Donathus Sutidjo Dr.-Ing. Dina Rubiana Widarda Edi Santosa Efendi, Darda Eko Sulistyono Gani Tarigan, Abdul Gani Grace Prilensia Damayanty Hariyadi Hariyadi Herdhata Agusta Ilyas Marzuki Indah Anita-Sari Irdika Mansur Kartika, Delima Ragil Krisantini Kusnendi, Faizal Shofwan Laksono, Purwanti Budi Launuru, Syahdin Lies Wahyuni Mardhikanto Luga Kadarisman Lukita Devy Maera Zasari Mahulette, Asri Subkhan Miska, Moch. Ega Elman Nindita, Anggi Ninin Yunike Novie Pranata Erdiansyah Odit Ferry Kurniadinata Riswan Basyri Nasution Rizki Fauziah Ramadhaini Rizkiana Anggayuhlin Rizkiana Anggayuhlin Roedhy Poerwanto Rohmah, Naelatur Rohman, Fadil Saiful Akhyar Lubis Sari, Allice Fajri Chynthia Sianturi, Vinsensia Febrina Siregar, Midian Romeo Sofyan Zaman Stefano, Indra Mario Sudarsono Sudarsono Sudarsono Sudirman Yahya Sudradjat , Sugeng Heri Suseno Suhartanto, Muhammad Rahmad Sulistianingrum, Ratih Supijatno SYAIFUL BAHRI Tengku Imam Saputra Tirsa Rachma Hastuti Ugroseno, Rene Vinsensia Febrina Sianturi Wahyu Angga Direja Yadi Setiadi

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