Dataverse World Agroforestry (ICRAF)
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Teak agroforestry systems for livelihood enhancement, industrial timber production, and environmental rehabilitation
No full textTeak is produced in industrial plantations in more than 43 countries. National and international demand for teak timber exceeds the sustainable yield from natural forests and plantations. High demand creates opportunities for enterprising farmers. Teak is now grown in smallholder' agroforestry systems in many tropical countries. These systems enable farmers to diversify production, reduce farm risk, contribute to food security, and generate much-needed income. They also meet commercial needs for timber and improve environmental conditions. This paper reports the contributions of teak systems to smallholders livelihoods in Indonesia, where farmers have been producing teak for over 50 years. Indonesian farmers cultivate teak as one component in integrated multispecies agroforestry systems. Annual cropping is an important aspect of these systems, producing commodities for both household consumption and market sale. Besides supplying food for households, smallholder teak systems provide 40% of household income from agricultural and timber crops. Teak and other tree crops allow households to re-allocate labor to off-farm employment when those opportunities are lucrative. However, farmers suffer from limited resources, labor, and access to information, which constrain the productivity of their teak sys
tems. Specific recommendations are provided regarding how smallholders can adopt improved silvicultural and marketing management. Roles for government, support agencies, and industry that would provide benefits to all parties are outlined. Policy changes that would motivate smallholders to improve the management of their teak systems are identified. Conclusions and recommendations are applicable to smallholder teak systems across the tropics
Improving rooting of Allanblackia cuttings through stockplant management and fertilizer application
No full textData is being analysed
Replication data for: White Jabon (Anthocephalus cadamba) and Red Jabon (Anthocephalus macrophyllus) for community land rehabilitation: improving local propagation efforts.
No full textNative to South and Southeast Asia, white jabon (Anthocephalus cadamba) and red jabon (Anthocephalus macrophyllus) are ideal choices for plantation and community forestry. Fast-growing and resistance to pests, the wood of these species have multiple uses. The species are preferred by local communities due to their adaptability and economic profitability. However, a lack of propagation technology appropriate for rural communities limits the domestication of jabon species. The research aimed to identify the best practices for seed germination and seedlings growth under rural conditions. The study used a completely randomized design, testing five treatments for germination media and nine treatments for growing media. Each treatment was replicated three times. All media tested were well-drained, of light texture, fertile, and can be easily produced by farmers by mixing appropriate portions of soils, sand and organic matter. The best soil media for germinating jabon seed is pure soil medium (100%) with the number of germinants equally 634 per 0.5 gram of seed, followed by the mixed soil-sand medium (1:1), which produced
514 germinants per 0.5 grams of seed. The best soil medium for height growth, diameter growth, and total dry weight of jabon seedlings was the mixed soil, cow-manure compost, and husk charcoal medium (3:1:1). These media can be produced under rural conditions with material easily available and improve local propagation of jabon species. Results are widely applicable
Replication data for: Households’ Willingness to Pay for Improved Watershed Services of the Layawan Watershed in Oroquieta City, Philippines
No full textWatersheds provide numerous ecosystem services to downstream communities often with no cost to them. Although these services are valuable to humans, they do not have monetary values attached to them, making their total economic value quite ambiguous. This ambiguity results in the non-optimal use o
f the natural resources that leads to the degradation of the watersheds. One approach that could address this issue is payments for ecological services (PES). The main objective of this study was to estimate the willingness-to-pay for improved watershed services by domestic water users within the Layawan Watershed in Oroquieta City. It employed the contingent valuation method to assess the willingness to pay of water users. More than 50% of the respondents voted positively to the referendum question which is whether they are willing to pay a certain amount for the conservation of the Layawan Watershed or not. The computed mean willingness to pay amounts were Php 57.48 and Php 53.89 per month per household for the parametric and non-parametric estimations, respectively. These amounts translate to 0.68% of the average monthly household income of the sample respondents, which is approximately Php 8 198.84. The amounts computed may serve as bases for a water user fee that may be collected from the domestic water users in the Layawan Watershed as buyers of the watershed services
Replication data for: Methodological approaches for the selection of genotypes in a progeny trial of Dacryodes edulis (G. Don) H. J. Lam in Cameroon
No full textThe World Agroforestry Centre (ICRAF) initiated a program in Cameroon for the selection of improved genotypes of Dacryodes edulis for domestication. There are major challenges in such selection because superior performance of individual trees may be based on site conditions rather than on genetic differences. Open-pollinated seeds were collected from mother trees in four provenances in Cameroon and planted in a progeny trial at Minkoameyos, Cameroon. Progeny from the same mother tree are referred to as family. After one year of growth in the field, growth traits were measured annually for five years and fruit traits were measured in two successive years. Three methodological approaches were investigated: family and within-family selection (combined selection), ranking for phenotypic selection and correlation for multi-trait and early selection. Variation in growth and fruit traits among families was not significant for most provenances, indicatin
g that family selection would not be effective for the selection of genotypes in the trial. Phenotypic selection resulted in the retention of a small number of individuals of all families in the trial. There were strong positive correlations between fruit traits and between fruit and growth traits, while negative correlations were found between fruit traits and yield. The correlations indicate that selecting for one fruit trait may also improve the other fruit traits but reduce fruit yield. Positive and significant juvenile-mature correlations for growth were also found in this trial, indicating that early selection may be possible based on growth. Based on these results, phenotypic selection is recommended in the progeny trial for the domestication program in Cameroon and further research on early selection is needed as the trial advances in age
Replication data for: Evaluation de la croissance des boutures de Dacryodes edulis en pepiniere
No full textThe study was carried out to assess cutting growth of Dacryodes edulis in the nursery whereby the cutting were numbered. Parameters such as number of live cuttings, number of dead cuttings, number of roots and length of roots were measured
Replication Data for: Mbosso C Degrande A van Damme P Tsafack S Nimino G Tchoundjeu Z 2015 Gender differences in knowledge, perception and use of the Ricinodendron heudelotii kernel extraction machine
No full textThis paper explores differences in knowledge, perception and use of a Ricinodendron heudelotii (njansang) extraction machine by women and men in Cameroon. With the view of designing a new technology that appropriately addresses the needs, concerns and interventions likely particularly to benefit women (the principal actors in processing of non-timber forest products), a survey was conducted with 81 households in five villages using a questionnaire. Results indicated that njansang processing is a main activity for women, but men earned more income from its sales. Women use the machine more often than men but are not as knowledgeable about the mechanical aspects. The familiarity of men with other machines makes them assess the price of the njansang extraction machine more accurately than women, leading to a greater willingness to adopt the technology. Men using the machine are less demanding and easier to satisfy.
For further research on the dissemination of the machine, women should be encouraged and trained not only on the proper pre-treatment of the nuts before extraction, but also on the functioning of the machine
Replication data for: Determinants of farmersâ tree planting behavior in the North West region of Cameroon: the case of Prunus Africana.
No full textPoor households in Cameroon rely on trees and tree-based products like the bark of Prunus africana(Hook.f.) Kalman (Rosaceae) (henceforth called Prunus) that are harvested from the wild.Due to unsustainable bark harvesting practices, the European Union, which is Cameroonâs main market for Prunus bark, banned its importation. To reduce pressure on existing natural stock, research and development organizations introduced innovations to encourage farmers to plant Prunus trees. The research reported in this article analyses farmer characteristics which influence their Prunus planting behaviour, and examines their main problems. Results from interviewing 154 farmers who have been trained on tree domestication techniques suggest that male farmers and those who bought their land have planted Prunus in their farms. We conclude that Prunus information and planting campaigns can be effective if they are accompanied with policies which influence better prices, supply of seeds and seedlings, and address land tenure issues
Investigation of rubber seed yield in Xishuangbanna and estimation of rubber seed oil based biodiesel potential in Southeast Asia
No full textN/
Passport data of mother trees of agroforestry species under domestication process in West and Central Africa
No full textIn order to study the behaviour of agroforestry species under domestication process in WCA, mother trees of each individual specimen actually under follow up was identified and characterized: Location, geospatial coordinates, species, ethnobotanical uses, fruiting habit, fruits characteristics, etc. Curr
ent data are for the following species; Cola nitida, Coula edulis, Dacryodes edulis, Dacryodes macrophylla, Garcinia lucida, Irvingia gabonensis, Mangifera indica, Persea americana in Cameroon