Pelita Perkebunan (Coffee and Cocoa Research Journal, CCRJ)
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Impact of Personal Characteristics of Farmers on Cocoa Yields: Case of Centre Region, Mbangassina Municipality, Cameroon
Full text linkCameroon is the fifth largest cocoa producer in the world with approximately 220,000 tons of cocoa produced annually. Many factors account for thisproductivity, amongst which are ageing farms and personal characteristics of farmers. The study follows a hypothetico-deductive methodology through whicha random sampling technique was adopted and relevant primary data was gathered with the aid of a structured questionnaire administered to 150 cocoa farmers from5 villages; Talba, Biakoa, Goura II, Mbangassina, and Bilomo. Correlation analysis and ordinary least squares regression were used to examine the relationship andeffects between socio-economic variables and cocoa yields. Findings showed a positive correlation between the socio-economic variables and cocoa yields, socioeconomic factors such as experience in cocoa farming, number of farms, source of labour, farm size, income were statistically significant at p = 1%, 5%, and 10%. Personal characteristics such as farm size, farming experience, percentage of income from cocoa farming, source of labour, number of farms per cocoa farmer,and cocoa price had a significant impact on cocoa yields. However, personal characteristics such as age, sex, marital status and household size did not showany significant impact on cocoa yields. Thus, professionalizing cocoa farmers and training of farmers in good cocoa business practices can go a long way toimprove cocoa productivity. 
Characteristics of coffee as a response to different environmental conditions in Lampung: I. Morphological variations
No full textThe coffee growth is considered to depend, partly, on the environmental condition at which they develop to accomplish their both vegetative and generative stages. An exploratory survey aimed at investigating the morphological characteristics of 13 Robusta coffee accessions growing on different environmental conditions, i.e. altitudes, slopes, and micro-climates, in Lampung. Local superior coffee clones were selected from 8 farms to evaluate in terms of their yield components and growth characters. Three key issues are considered to observe quantitatively, i.e. plant components of leaves, branches, and fruits. The qualitative characteristics of leaves and cherries, i.e. colour and shape, were also assessed to support the comparative data analysis. The results show a similarity of ca. 60% of total qualitative variable identified among different accessions. The remaining characters are suggested to be more varying such as flush colour, leaf surface, ripe fruit colour, and stipule shape. Furthermore, a quantitative analysis shows a higher level of similarity for fruit characters, i.e. fruit length, fruit width, and fruit thickness, and to a slightly lower level for leaf characteristics, i.e. leaf length and width, and the number of productive branches. Conversely, part of yield component, such as weight of fruits, may be affected by altitude as some accessions, e.g. number 1 and 8, demonstrating a pronounced character in the principal component analysis. The same analysis reveals that some variables, i.e. fruit weight; leaf and seed; and canopy characteristics, explaining the morphological variation of coffee throughout the accessions. Furthermore, cluster analysis may indicate a possible similarity of coffee morphologies either from area with different or the same environmental conditions. Therefore, it can be concluded that environmental condition variation in Lampung may affect to a lesser extent the morphological characters of Robusta coffee
Characterization and Identification of Caffeine-Degrading Bacteria KAJ 36
Full text linkCaffeine could be utilized by caffeine-degrading bacteria as a source of carbon and nitrogen. These bacteria have the potential as an agent of decaffeinating coffee. The objective of this research was to characterize and identify the caffeinedegrading bacteria KAJ 36 that was isolated from the pulp waste of Coffea arabica. The isolate-characterization was performed based on its growth and caffeine degradation activity.in a medium M9 added with 10 g/L caffeine for 7 days. The isolate identification was conducted using 16S rRNA sequence analysis and biochemical analysis. The result indicated that caffein-degrading bacteria were able to grow and degrade the caffein up to 86% activity on M9 medium added 10 g/L caffeine for 7 days incubation. Based on 16S rRNA, the isolated KAJ 36 had sequences of 99% homology with Pseudomonas monteilii. Biochemical analysis showed that this isolation on the specific medium was a gram-negative, oxidative, positive enzymatic activity (oxidase, catalase, urease) and reduce nitrate. Our results showed that the isolated KAJ 36 was capable of producing fluorescent pigment. This bacterium was unable to produce indole or utilize sucrose and lactose. Based on the cultural characteristics, we found that the isolated KAJ 36 could be grown in a medium with pH 5, 7, and 9, and in the environment with up to 37oC. This evidence suggested that P. monteilii KAJ 36 can be used as a potential degradation agent of caffeine and recommend for future research in the bacterial based on the degradation of caffeine-contained coffee
Short-term dynamics of leaf litter-derived soil organic carbon under different coffee and cocoa cropping systems
No full textLitter plays a crucial role in the formation of soil organic carbon (SOC), and potentially affects different pools in the context of soil carbon cycle. To improve knowledge and understanding with respect to the dynamics of carbon in coffee and cocoa cropping systems, there is a need to develop a mechanistic model to explain the formation of carbon especially in different background of soil, climate and agronomic management. Short-term observation was performed in different cropping systems, i.e. coffee (Coff) and cocoa (CoL) with lamtoro(Leucaena sp.) shade trees, and cocoa with oil palm (Elaeis guineensis) shade trees (CoP), and teak (Tectona grandis) conservation area, to investigate the quantitative amount of leaf litter-derived carbon. Additionally, to improve the understanding with respect to the formation of soil organic carbon, a simple model is developed by employing organic carbon storage coefficient (hi) as parameter to validate the observation data from Coff and CoL plots. Leaf litter is collected daily with concomitant microclimate records, i.e. air temperature, relative humidity, light intensity, and soil temperature. Composite soil and leaf samples are collected for organic carbon, soil moisture content, and leaf relative water content (RWC), for laboratory identification. Analysis of data suggests the presence of cropping system effect, i.e. shading condition and agronomical practices such as pruning, to microclimate variations except for soil temperature. Furthermore, cropping systems do not significantly influence soil moisture content, amount of organic carbon, and RWC. With higher model efficiency (EF), the simulated model fits better for CoL, EF 0.95, than Coff, EF 0.58. Model simulation, with both hi values are 0.017 and 0.014 in Coff and CoL, reveals a possibly cropping system specific curve pattern. A faster SOC formation in Coff plot has suggested a crucial role the amount of leaf litter to support with continuous carbon supply. The simulation implies the presence of soil related-maximum point limiting carbon storage capacit
Potential and Stability of Promising Fine Flavor Cocoa Clones in Different Seasons:: Yield, Quality and Resistance to Vascular Streak Dieback
Full text linkThe intensity of vascular streak dieback (VSD) disease is one of the major causes of decreased fine flavor cocoa production in Indonesia; therefore, it is essentialto develop superior planting materials resistant to this disease. The purpose of the study was to conduct initial identification of yield potential and resistancelevel to VSD disease in several promising clones of fine flavor cocoa and to identify bean quality profile. This study was conducted at Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute, Jember, Indonesia, with an altitude of 45 m above sea level (asl.) and C climate type, according to the Schmidt-Ferguson classification system. The study design used a complete randomized block design consisting of 13 promising clones and 3 superior clones of fine flavor cocoa as control. Each treatment was repeated 4 times in blocks, and each plot consisted of 5 plants. The results showed that PNT 16 was potential to be developed as a superior promising clone of fine flavor cocoa with high yield potential (66.6 pods/ tree/year equal to 2.52 kg dry bean/tree/year) and low VSD level (VSD score: 0.4) in first year of production (4 years old after planting). The superior promising clone of PNT 16 comprises of 35.1 beans per pod with good quality, weighed by 1.25 g/bean, and a higher percentage of white seeds above 80% (94.9%). Furthermore, the specifications of the main flavor attributes are similar to ICCRI 09 and dominated by the browned roasted, nutty and browned fruit aroma. Therefore, the clone has the potential to be developed as one of the special cocoa products. 
Determination of Criteria and Drought Tolerance of Prope-Legitimate Cocoa Seed Through Polyethylene Glycol Induction
Full text linkThe availability of drought tolerant rootstock becomes one of solution to obtain tolerant cocoa clone at drought condition. The production of rootstock is easier and faster by using prope-legitimate seeds as plant materials. Seed germination selection phase can accelerate the obtainment of tolerant cocoa rootstocks. The tolerance trait of prope-legitimate seeds can be determined by seed germination on media induced by polyethylene glycol (PEG) solution. To determine the tolerant seeds, it is effective by using a specific character as selection criteria. This study aimed to obtain criteria and selection character to determine droughttolerant characteristic of prope-legitimate seed through PEG 6000 induction in the germination phase. The research was conducted at the Agronomy Laboratoryof the Indonesian Coffee and Cocoa Research Institute, Jember, East Java, Indonesia, used split plot design with five replications as experimental design. The main plot was solution of 0% and 6% PEG 6000, while the subplot were prope-legitimate seeds of 13 cocoa clones. The result showed that germination ability and sprout fresh weight were suitable as selection criteria to determine tolerant characteristic of prope-legitimate seeds to drought stress. Based on the value of tress susceptible index and clustering analysis, the tested prope-legitimate seeds were divided into three groups. The group of tolerant genotype consisted of Sca 06, while the group of medium tolerant were ICCRI 03, Sulawesi 02, KW 641, TSH 858, KEE 02, Sulawesi 03, and KW 617. The susceptible group consisted of six genotypes, namely ICS 60, KKM 22, KW 516, Sulawesi 01, and MCC 02. 
Adoption Levels of Cocoa Rehabilitation Programmes in South-west Nigeria
Full text linkCocoa is an important crop to the economies of countries such as Nigeria, Cote D’Ivoire, Ghana and Cameroon in West Africa. In an effort to revive cocoasector and increase cocoa production in Nigeria led to cocoa rehabilitation programme (CRPs) by the Federal Government of Nigeria. This study ascertainedthe adoption levels of farmers in cocoa rehabilitation programmes in South-west Nigeria. Data for the study were collected from 240 cocoa farmers through theuse of interview schedule and focus group discussion. Multistage sampling procedure was used in selecting respondents. Data were analysed using percentageand mean statistics. Results revealed that, adoption level was low for coppicing techniques (38.0%, 32.0% and 33.0%) and complete replanting (25.0%, 27.0% and26.0%) of cocoa rehabilitation programme, respectively, for the three groups of farmers (farmers that benefitted from government agency cocoa resuscitationprogramme, farmers that benefitted from non-governmental agency cocoa resuscitation programme and farmers that benefitted from both governmental and nongovernmental agencies). Planting of young cocoa seedling under old cocoa trees (98%, 94%, 95%) and selective planting/gapping up (68.0%, 81.0% and 79.0%) had a very high adoption level for the three groups of the farmers. The most helpful agency in the adoption of cocoa resuscitation programmes was Agricultural Development Programme. To improve the level of adoption of cocoa resuscitation programmes, the federal government of Nigeria should further intensifyefforts in encouraging more farmers in cocoa rehabilitation programme by providing the necessary incentives (like distribution of free cocoa seedlings) to the farmers as at when necessary
Knowledge Level of Farmers and the Importance of Coffee Seedling Attributes and Accessibilities in Bandung Regency, West Java, Indonesia
Full text linkBandung Regency is one of the main Arabica coffee plant development centers in West Java, especially in Pangalengan District. The problem of Arabicacoffee farming is that the seedlings used not from recommended seed gardens, which may affect coffee productivity in the future. There are several factors thatinfluence farmers in the selection of coffee seedlings, including the knowledge of farmers on the attributes of coffee seedlings, and the importance of the attributes. The purpose of this study were 1) analyzing farmers’perception on the importance of different coffee seedlings attributes; 2) analyzing farmers’ knowledge of the seedlings attributes in each coffee variety; 3) analyzing the level of suitability and gap of the attributes of Arabica coffee seedling and the position of various categories of attributes and seedling accessibility in the concept of priority. The research method used quantitative approach from 77 coffee farmers. The data was analysed using descriptive analysis, Importance Performance Analysis and Cartesian diagrams. The results show that in general all the coffee attributes and seedlings accessibility evaluated had a positive score and very important for farmers. Furthermore, the farmers’ knowledge on the attributes and seedlings accessibility was variaed. Farmers have good knowledge on seedlings size, productive age, productivity, fertilizer use efficiency, seedling price, and ease of obtaining seedling attributes. There is an unsuitability and gap between the important and knowledge level of farmers about coffee attributes and seedlings accessibility. 
Effect of ascorbic acid on chemical content and viability of cocoa seed after storage.
Full text linkStorage of oily seeds will give the seeds deteriorated faster due to oil auto-oxidation. It will changes the biochemical and physiological of the seeds. Reducing sugar, protein and fat are biochemical compound those support the seeds during germination. Auto-oxidation of fat can produce free fatty acids whichcause seeds to lose viability and vigor during storage. Application of antioxidant can prevent the activity of auto-oxidation. This research aimed to study the effect of ascorbic acid to minimize the deterioration by observing the chemical content and viability of Theobroma cacao L. seeds. It was conducted at KaliwiningExperimental Station, Indonesian Coffee and Cocoa Research Institute, Jember, East Java and at Satya Wacana Christian University, Salatiga, Central Java. The research used completely randomized design and T-test analysis. The treatments consisted of four ascorbic acid concentrations, i.e. 0 ppm as control, 250 ppm, 300 ppm, and 350 ppm. The treated cacao seeds were stored for two shelf life i.e. 1 week and 2 weeks. Each treatment was repeated with seven replications. Data analysis used SAS 9.0. The results showed that application 250 and 300 ppm of ascorbic acid increased reducing sugar, protein content decreased fat and free fatty acid content of cocoa seeds. Application of 350 ppm of ascorbic acid decreased reducing sugar, protein, fat content and increased free fatty acid content of cocoa seeds. Application of ascorbic acid with concentration of 250 ppm and 300 ppm could maintain cocoa seeds viability upto 2 weeks of shelf life
Yield Performance of Some Promising Cocoa Clones (Theobroma cacao L.) at Dry Climate Condition
No full textEl Nino effect as impact from global climate change needed anticipation effectively to keep cocoa production still give farmer benefit because effect of long dry season make some trouble in cocoa production. Cocoa production technology package that suitable in dry land needed for sustainable and empowerment cocoa production in marginal dry land. Principal component of this technology package is superior planting material because success of cocoa production depend on accuracy of selecting planting material. Indonesian Coffee and Cocoa Research Institute consistently carries out cocoa breeding programs aimed at overcoming problems in the field, specifically to obtain superior planting material that is tolerant to biotic and abiotic stress. This research method was carried out by observing 22 promising clones of cocoa that were planted in the Kaliwining experimental station in the 2013-2017 observation period, each clone planted in three blocks. The observed variables included estimation of production, resistance to VSD, helopeltis, and pod rot. Based on multivariate analysis, it was found that ICCRI 09 had a stable production performance from 2013 - 2017 while the promising clone of KW 641 had a special adaptation to dry conditions. Both of these clones have the potential to be developed as drought tolerant planting material to overcome the impact of climate change on cocoa production. The observation results of pest and disease attacks obtained a pattern that the clones that have tolerance to drought have good resistance to VSD