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All Journal Caraka Tani: Journal of Sustainable Agriculture
Didik Indradewa
Department of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta
Agriculture, Biological Sciences & Forestry

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Study on Weeds Abundance on Rice Fields in Mycorrhizal Inoculation and Different Planting Methods Charisnalia Listyowati; Didik Indradewa; Siti Nurul Rofiqo Irwan
Caraka Tani: Journal of Sustainable Agriculture Vol 37, No 2 (2022): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v37i2.53131

Abstract

The increasing demand for rice and the increasing population growth rate require sustainable rice production. Direct seeding of rice (DSR) combined with the use of arbuscular mycorrhizal fungi (AMF) is needed to achieve sustainable food production. This study aims to determine the effect of the planting method and mycorrhizal inoculation on the diversity, composition and dominance of weeds in a rice field for the sustainability of agricultural production. The research used a split-plot design with three replications. The main plot was the planting method consisting of on row, drum seeder and transplanting, while the subplot was mycorrhizal inoculation divided into with mycorrhizal inoculation and without mycorrhizal inoculation. The observed variables were light penetration, weeds population, weeds composition, weeds biomass, summed dominance ratio and community coefficient. The results showed that there were 34 kinds of weeds consisting of 13 families and the dominant weed was annual weeds, most of which were broadleaf weeds. The dominant weed was Alternanthera sessilis (L.) R. Br. ex DC. (sessile joyweed). The planting methods affected the weed population in 24 days after sowing (DAS) and the composition of broadleaf weeds in 24 DAS but did not affect weed biomass. The AMF inoculation did not affect weed population, composition, or biomass. It is necessary to find mycorrhizal species that can affect weed growth.
Macronutrient Contents and Yield of Cocoa Resulting from Two Different Rejuvenation Techniques Radhika Pingky Meilani; Eka Tarwaca Susila Putra; Didik Indradewa
Caraka Tani: Journal of Sustainable Agriculture Vol 38, No 2 (2023): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v38i2.57674

Abstract

Cocoa (Theobroma cacao L.) is one of Indonesia’s leading and important export commodities. The cocoa plant rejuvenation techniques aim to increase cocoa production and quality. Ring budding and side grafting can rejuvenate old and unproductive cocoa plants. Therefore, this research was conducted with objectives: 1) to record macronutrient contents, yield components and yields of three cocoa clones, KKM 22, RCC 70 and RCC 71, rejuvenated with ring budding and side grafting, 2) to determine the best techniques in rejuvenation program for old cocoa stand based on nutrient contents, yield components, and yields indicators of three cocoa clones. This research was carried out from November 2020 to January 2021 at Cocoa Plantation, North Segayung Production Unit, Pagilaran Company. The results showed that ring-budded plants had the highest N nutrients content in leaves, stem organic-C production capacity, pods number per stand per year, dry weight bean per stand per year and dry weight bean per hectare per year, which was significantly better than side grafted plants. The macronutrient of total parts (leaves, stem, and root) trend was leaves > stem > root. The trend of macronutrients in cocoa were organic-C > N > Ca > K > Mg > P. Based on the macronutrient content of cocoa tissue, KKM 22 have a higher content of organic-C, N, P, K, Ca, and Mg compared to RCC 71 and RCC 70. The budding ring technique was the best in the rejuvenation program for old cocoa stands based on nutrient contents, yield components, and yield indicators of three cocoa clones.
Traditional Ecological Knowledge and Farm Household Resilience to Natural Hazards Arini Wahyu Utami; Nadila Puspa Arum Widjanarko; Didik Indradewa; Aura Dhamira; Mutiarra Ridyo Arum; Fathi Alfinur Rizqi; Nurul Amri Komarudin; Din Prabaningtyas
Caraka Tani: Journal of Sustainable Agriculture Vol 39, No 1 (2024): April
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v39i1.79774

Abstract

This study portrays the roles of Traditional Ecological Knowledge (TEK) in the mitigation of natural hazards. Menoreh Hill in Kulon Progo experienced more than 200 landslides in 2022 and its communities implemented TEK to mitigate them. Hence, this research quantitatively analyzes the role of agriculture-related TEK, especially those applied in hilly areas, to support household resilience to natural hazards. Authors surveyed 106 farm households and interviewed eight key informants in Banjararum and Sidoharjo Villages, Kalibawang and Samigaluh Sub-districts, Kulon Progo Regency, D.I. Yogyakarta. The data were then analyzed using descriptive statistics and binary logistic regression. The descriptive statistics showed that farmers in both villages are highest in practicing alley cropping and integrated farming, while also applying mixed cropping, multiple cropping and locally based planting schedule (pranata mangsa). From binary logistic regression, authors found that TEK practices of multiple cropping, alley cropping and pranata mangsa support farm household resilience to natural hazards, especially landslides. The TEK practices serve as sources of buffer and adaptation capacity in the development of farm household resilience. Interestingly, mixed cropping and membership in farmer groups tend to weaken resilience, as mixed cropping often complicates the recovery efforts in the farmlands, and farmers’ groups are not conditioned to act promptly during hazards or disasters. While TEK has been proven to take roles in the mitigation and adaptation to natural hazards, there is a need to integrate scientific knowledge to improve its optimum benefits.
Co-Authors Arini Wahyu Utami Aura Dhamira Charisnalia Listyowati Din Prabaningtyas Eka Tarwaca Susila Putra Fathi Alfinur Rizqi Mutiarra Ridyo Arum Nadila Puspa Arum Widjanarko Nurul Amri Komarudin Radhika Pingky Meilani Siti Nurul Rofiqo Irwan