Journal of Agriculture and Rural Development in the Tropics and Subtropics最新文献

{"title":"Are there gender differences in access to and demand for East Coast fever vaccine? Empirical evidence from rural smallholder dairy farmers in Kenya","authors":"H. Jumba, H. Kiara, G. Owuor, N. Teufel","doi":"10.17170/KOBRA-202010191970","DOIUrl":"https://doi.org/10.17170/KOBRA-202010191970","url":null,"abstract":"Women lag in the adoption of agricultural innovations compared to men, mainly due to gender inequalities in access to complementary inputs, capital, and knowledge/information. The Infection-and-Treatment-Method (ITM) is considered a safe and effective method of controlling East Coast fever. However, since its commercialisation in Kenya differences in demand for this vaccine among smallholder men and women dairy cattle keepers have not been assessed. Using a sample of 448 respondents, we used an Average-Treatment-Effect framework to estimate ITM adoption rates under awareness constraints and the determinants of adoption among smallholder male-headed (MHHs) and femaleheaded (FHHs) households. We found some difference in ITM awareness between MHHs (57 per cent) and FHHs (46 per cent). However, gender adoption gaps in the actual and potential adoption rates were considerable, with actual adoption rates of 41 per cent and potential adoption rate of 62 per cent among MHHs, compared to 19 per cent actual and 31 per cent potential adoption for FHHs. The smaller adoption gap for FHHs indicates that only increasing awareness amongst FHHs will not reduce inequities. ITM adoption in both household headships was mainly determined by education, extension interventions, access to financial services, and social capital. In addition to this, ITM adoption in FHHs was positively influenced by age, land-size, and group membership. To realise adoption beyond the current potential and to reduce inequities at the scale-up stage, gender-specific interventions targeting resource-poor women cattle keepers would be effective, in addition to ensuring that women have access to extension and financial services.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43448864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drivers of farmers market participation in southeast Nigeria","authors":"P. Opata, A. Ezeibe, R. N. Arua","doi":"10.17170/KOBRA-202010191969","DOIUrl":"https://doi.org/10.17170/KOBRA-202010191969","url":null,"abstract":"The objective of this paper was to investigate the drivers of farmers’ participation in the output market for yellow pepper using a sample of 420 randomly selected producers from 8,500 farmers in selected markets in southeast Nigeria. The heterogeneity of smallholder market participation was modelled with quantile regression. The variables that affected all the quantiles (i.e. for subsistence, semi-subsistence, intermediate, semi-commercial and commercially oriented farms) are the distance to the trading centre and the level of poultry manure applied. The estimated coefficients of poultry manure were statistically significant and directly related to commercialisation of pepper, while the distance to market was negatively correlated. The estimated coefficients for land size, age of household head, fertiliser and agrochemicals use, were positive and significant while income from other sources and asphalt road were negative and significant. It could be deduced from the results that specialisation and commercialisation in yellow pepper production in southeast Nigeria triggers the production of other commercial crops (i.e. cassava, maize, tomatoes, and garden eggs, groundnut, okra, fluted pumpkin, amaranth, and sweet potatoes). The findings showed that volume of pepper sold and total farm production and consumption were indicators for household food security and income. These suggest that smallholder market participation in West Africa could be driven by policies aimed at improving the commercial crops that are highly marketable, rural road infrastructure, market information systems, asset accumulation, human capital and promotion of farmer organisations.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"207-217"},"PeriodicalIF":0.0,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43809032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimising beekeeping development programs for improved productivity, income and welfare: a case study of Papua New Guinea","authors":"C. Schouten, D. Lloyd, R. Sengere, J. Aranka","doi":"10.17170/KOBRA-202007291511","DOIUrl":"https://doi.org/10.17170/KOBRA-202007291511","url":null,"abstract":"Beekeeping can provide important sources of cash income for farmers in developing countries where land is unconducive to crop and livestock production systems. In many low-income countries however, attrition among beekeeping adopters remains a chronic problem, colony losses are high, support for and coordination of the sector is low, and practices, production and income from beekeeping is often inefficient. This study investigated the key drivers and practices influencing incomes from beekeeping, honey production and numbers of hives owned by beekeepers in the Eastern Highlands Province of Papua New Guinea. Survey data from 117 beekeepers revealed that beekeeping contributes to improving farmers resilience and security in times of financial hardship with 85% of beekeepers reporting using their honey as a form of a bank and beekeepers earning average annual net incomes of US$715.50. Specifically, our results highlight the importance of supplementary feeding, multiplying colonies by making splits, reinvestment into beekeeping enterprises and access to more than a single apiary site as key factors influencing productivity and income. This study provides guidelines for optimising beekeeping outcomes in low-income countries and provides recommendations to inform policy options for strengthening beekeeping for sustainable community development programs and partnerships.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"195-206"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43154273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Forage biomass availability, species diversity and seasonal variation in grazing behaviour of cattle in the outskirts of Ouagadougou","authors":"Cécile Sarambé, Marie-Louise Kaboré, N. Zampaligré, R. Roessler, M. Sangare","doi":"10.17170/KOBRA-202007291510","DOIUrl":"https://doi.org/10.17170/KOBRA-202007291510","url":null,"abstract":"In order to determine the exploitation of grazing areas in the outskirts of Ouagadougou by cattle herds, the grazing behaviour of cows was monitored in five villages in these during three distinct seasons, namely wet, cool dry and hot dry season. A vegetation study including a census of the woody and herbaceous stratum of grazing areas allowed for an assessment of the pasture biomass availability during the wet season. Results of the monitoring of cattle herds showed that the land type grazed by cattle in the outskirts of the city varied depending on the season. While fallows and post-harvest fields constituted the main land type grazed by cattle in the wet and cool dry season, respectively, cattle herds exploited a variety of land types in the hot dry season. Consequently, cows travelled longer distances and spent more time on walking and browsing and less time on grazing in the hot dry season than in the cool dry and wet season. The pastoral value of grazing areas during the wet season, an important indicator for the quality of the grazing areas being based on the pastoral composition and the global quality index, was estimated at 61.1 %. The biomass was mainly dominated by annual grasses and legumes. The total annual above-ground biomass produced amounted to 575 kg DM ha -1 , equivalent to a qualified forage production of 324 kg DM ha -1 and a carrying capacity of 0.084 TLU ha -1 . In total, over 100 different herbaceous and 48 woody species were identified, each belonging to 20 families. Despite a high diversity of woody and herbaceous species, it is recommended to reduce the grazing pressure of cattle herds in the outskirts of Ouagadougou by addressing alternative feeding strategies.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"185-194"},"PeriodicalIF":0.0,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44383014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors driving adoption and constraining the non-adoption of biofortified orange fleshed sweet potatoes (OFSP) among farmers in Abia State, Nigeria","authors":"J. Chah, I. Anugwa, Ifeanyi M. Nwafor","doi":"10.17170/KOBRA-202007291509","DOIUrl":"https://doi.org/10.17170/KOBRA-202007291509","url":null,"abstract":"This study sought to determine the factors that drive the adoption and constrain the non-adoption of Orange Fleshed Sweet Potato (OFSP) varieties among farmers in Abia State, Nigeria. Multistage sampling procedure was used in selecting sixty sweet potato farmers (thirty adopters and non-adopters each). Participatory tools such as structured interview schedule, key informant interviews and personal observation were employed for quantitative and qualitative data collection. The data were analysed using descriptive statistical tools like, percentage, mean scores and factor analysis. The results of the study revealed that a greater percent of both adopters and non-adopters of OFSP were males. Although the adopters were older than the non-adopters, they were more educated, cosmopolite, cultivated larger farm sizes, earned more income, had more extension contact and access to credit than the non-adopters. The majority of adopters had high knowledge, while non-adopters had moderate knowledge of OFSP. The adopters were motivated to adopt the OFSP mainly as a result of its pleasant taste, profit from the sale of its roots and vines and not necessarily because of its perceived health benefits of supplementing vitamin A. Perceived constraints to the adoption of OFSP by non-adopters were particularly the complexity of OFSP production techniques and the high cost of OFSP vines and roots. Thus, extension agents should create more sensitisation and provide education about OFSP to farmers. Additionally, concerted eorts should be made by the research institutes to provide adequate and easily accessible inputs (vines and other planting materials) so that more farmers can produce vitamin A rich OFSP.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"173-183"},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49234516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variation in baobab (Adansonia digitata L.) root tuber development and leaf number among different growth conditions for five provenances in Malawi","authors":"L. Jansen, D. Darr, Nele Hansohm, J. Gebauer, K. Meinhold, C. Munthali, F. Wichern","doi":"10.17170/KOBRA-202007291508","DOIUrl":"https://doi.org/10.17170/KOBRA-202007291508","url":null,"abstract":"The baobab tree is an underutilised indigenous fruit tree in sub-Saharan Africa which, at the same time is vulnerable to overexploitation in areas close to centres of demand, as currently baobab use is limited to wild, baobab trees. Baobab seedlings are known to form root tubers, but little is known about their growth characteristics and its yield potential. This study aims to investigate the root tuber and leaf development of baobab seedlings grown from seeds of five provenances, sown at three different planting distances in two nursery trials at climatically distinct locations in Malawi, namely Mzuzu and Mangochi. The observed yield data was fed into preliminary farm-gate profitability analyses for three different scenarios that differed by planting distance. Results indicate increased growth rates for root dry mass and number of developed leaves with increasing planting distance. However, we did not find a significant effect of seedling provenance on any of the measured plant growth parameters. Seedlings invested mainly into root development during the growth period, with root tubers reaching an average fresh weight of 41 ± 39 g and an average length of 24 ± 11.9 cm at 138 days after sowing. Profitability analyses showed a potential total net benefit of 12.78 USD per harvest cycle of 16 weeks and per 100 m² of land cultivated with baobab root tubers, which was better than an alternative scenario of maize cropping on the same area that showed a negative total net benefit when cost of family labour was included. However, the heterogeneity of root tuber development as affected by abiotic and biotic factors like soil fertility and water availability, as well as genetic origin warrant further investigation.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"161-172"},"PeriodicalIF":0.0,"publicationDate":"2020-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49330164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology, biochemistry, and management of Russian olive (Elaeagnus angustifolia L.) accessions in Gilgit-Baltistan, northern Pakistan","authors":"M. Azmat, A. Khan, I. Khan, A. Buerkert, Martin Wiehle","doi":"10.17170/KOBRA-202007291507","DOIUrl":"https://doi.org/10.17170/KOBRA-202007291507","url":null,"abstract":"Russian olive ( Elaeagnus angustifolia L., Elagnaceae) is a native multi-purpose medicinal shrub or tree of Asian regions and an integral component of high altitude terraced agroforestry systems of Gilgit-Baltistan, northern Pakistan. The strong increase in deforestation, urbanisation, and the loss of ethnically-based medication practices in local communities are gradually leading to depletion of its stands and knowledge of its use. In view of these circumstances, this study was undertaken to characterise Russian olive accessions as a first step towards the conservation of this important wild plant genetic resource. Ninety-three fruits (including seeds) and leaves were sampled to determine morphological variability among accessions. In addition, the phenolic composition of fruit pulp of 40 fruits was used for determination of phenolic compounds. To assess the local importance of the fruit, 42 Russian olive collectors and traders were interviewed. Data were analysed using PCA and clustering approaches. Fruit traits across groups were equally shared. Elevation had a positive effect on fruit and seed dimensions especially on length (r = 0.606 and 0.515, respectively) and weight (r = 0.618 and 0.695, respectively). Bioactive substances such as DPPH and flavonoids in the sampled fruits exceeded most values found in the literature by a factor of 100 and 30, respectively. The socio-economic household analysis highlighted that Russian olive harvest and trade is a purely additional income strategy. On average, about 90 € (ca. 16000 PKR) were earned by one household ranging from about 35 € to about 205 € per year. Data yielded a mixed picture on morphological and biochemical diversity as well as the socio-economic background, but indicated that northern regions of Pakistan might be an important centre for biodiversity of this species in Central Asia, which merits improved marketing.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"151-160"},"PeriodicalIF":0.0,"publicationDate":"2020-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44942096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Typology of smallholder’s pig production systems in South Kivu, Democratic Republic of Congo: Challenges and opportunities","authors":"Y. Mugumaarhahama, V. Mutwedu, L. M. Kazamwali, A. Mushagalusa, Fabrice Bantuzeko, S. Ndjadi, A. B. Ndeko, N. Cirezi, P. C. Azine, R. Ayagirwe","doi":"10.17170/KOBRA-202005281301","DOIUrl":"https://doi.org/10.17170/KOBRA-202005281301","url":null,"abstract":"Pig farming plays an important role in farmers’ livelihoods in many tropical countries. It contributes to food security of the poorest as well as the development of rural economy through multiplier effects. In the South Kivu province, pig farms are almost exclusively owned by smallholders. A few studies have attempted to describe thoroughly pig farming systems in this province. This study was undertaken to characterise pig production systems, in order to better understand their current situation, namely constraints they face and opportunities they offer. Investigation was conducted based on a structured survey questionnaire and participatory interviews with the owners of 989 farms in South-Kivu. Collected data was analysed using Multiple Correspondence Analysis and clustering techniques. Results showed that there are two types of smallholder pig farms differing mainly in the type of husbandry and feeding management. One category includes farms that raise pigs in free-range system consuming forages and scavenge feed (heaps picked-up from garbage and trash on their ways), which are sometimes, combined with crop residues and kitchen leftovers. The second category includes improved pig farms raising tethered pigs or in lairage where feed is mostly based on forages combined with kitchen leftovers, crop residues and concentrate feed. Nevertheless, all these different farm types share many common characteristics, including having pigs of local breeds, small herd sizes, absence of breeding boars and absence of adequate prophylactic measures. It emerged that female farmers together with experienced farmers mainly own pig farms with better characteristics (breed type, management practices, litter size, etc.). Hence, the involvement of women in pig farming can offer better prospects for the improvement of this sector. In addition, access to agricultural credit can also be an alternative to foster investment in livestock in South Kivu. All this can only lead to better results though improved local market access to smallholder producers.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"135-146"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45702529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence, distribution and alternative hosts of Wheat streak mosaic virus infecting ginger in Kaduna State, Nigeria.","authors":"P. Abraham, Olalekam Oyeleke Banwo, B. D. Kashina, M. D. Alegbejo","doi":"10.17170/KOBRA-202005281300","DOIUrl":"https://doi.org/10.17170/KOBRA-202005281300","url":null,"abstract":"A field survey was conducted during the 2018 rainy season (June – October) in three major ginger producing Local Government Areas (LGAs) of Kaduna State, Nigeria to determine the occurrence and spread of wheat streak mosaic virus (WSMV) infecting ginger. Symptomatic and asymptomatic ginger leaf samples (n=180) and weed samples (n=45) were collected from the surveyed fields and indexed against WSMV using Double Antibody Sandwich Enzyme-linked Immunosorbent Assay (DAS-ELISA). The results obtained showed that WSMV occurred in all the LGAs surveyed but with significant ( P = 0.05 ) variation in distribution. Jaba had the highest virus incidence (22.67,%) followed by Kagarko (17.67,%) while Kachia had the lowest virus incidence of 10.00,%. To the best of our knowledge, this is the first report of WSMV infecting ginger in Nigeria. Rottboellia cochinchinensis (Lour.) Clayton and Setaria barbata (Lam.) Kunth tested positive against WSMV as alternative weed hosts of the virus. The incidence of WSMV even at lower percentage is significant as population build-up could lead to a disease outbreak. Awareness programs need to be organised for farmers on yield loss potential of WSMV on ginger crop and the role of cultural practices on the incidence and management of the virus.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"127-133"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48354001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of agroecological practices on soil organic carbon sequestration using synchronic and diachronic approaches in Madagascar","authors":"N. H. Rakotovao, N. Ramifehiarivo, C. Grinand, H. Razakamanarivo, A. Albrecht, T. Razafimbelo","doi":"10.17170/KOBRA-202005281299","DOIUrl":"https://doi.org/10.17170/KOBRA-202005281299","url":null,"abstract":"Soil organic carbon (SOC) sequestration in agricultural systems is a key indicator of soil fertility improvement and climate change mitigation at the global scale. In Madagascar, the effect on SOC sequestration of converting from traditional practices to agroecological ones remains unclear. The objectives of this study were (i) to assess the impact of agroecological practices, such as agroforestry (AF), tree plantation (TP) and improved farming practices (IFPs), on SOC sequestration at the field level; and (ii) to use both synchronic and diachronic approaches to quantify SOC sequestration following the adoption of agroecological practices. For the diachronic approach, two sampling years (2014 and 2018) were used to assess the annual soil carbon sequestration rates with agroecological practices. For the synchronic approach, SOC sequestration arising from agroecological practices was compared to that on reference fields, such as fallow land (FL) and traditional farming practices (TFPs). Soil sampling were carried out on 36 fields with agroecological practices and 60 reference TFP and FL fields. The diachronic approach showed that SOC sequestration rates for AF, TP and IFPs were respectively, +2.8, +1.6 and -0.9 MgC.ha -1 .yr -1 . The synchronic approach showed that SOC stock in AF was higher (109.4 MgC.ha -1 ) than in reference TFP (73.8 MgC.ha -1 ) and FL (67.4 MgC.ha -1 ) fields. The SOC stock in IFP (74.8 MgC.ha -1 ) and TP (69 MgC.ha -1 ) presented no significant difference compared to reference fields. This study provided a better understanding of soil carbon dynamics at the farm level in Madagascar when agroecological practices are adopted in place of traditional practices.","PeriodicalId":54889,"journal":{"name":"Journal of Agriculture and Rural Development in the Tropics and Subtropics","volume":"121 1","pages":"113-125"},"PeriodicalIF":0.0,"publicationDate":"2020-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41544324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}