Global assessment of manure management policies and practices

In 2014 an assessment of livestock manure policies was performed in 34 countries in Asia, Africa and Latin America, followed by an in-depth assessment of manure management practices in Bangladesh, Viet Nam, Ethiopia, Malawi, Argentina and Costa Rica. The assessments revealed the key barriers for improving integrated manure management and identified six opportunities for actual practice changes to improve manure related policies as well as farm practices with the overall objective of improving food security while mitigating methane emissions at the same tim

Adverse impact of banana Xanthomonas Wilt on farmers’ livelihoods in Eastern and Central Africa

Banana is a key crop in the livelihoods of many people in the Great Lakes region of East and Central Africa. For more than a decade now, the crop has been threatened by Banana Xanthomonas Wilt (BXW) which has spread throughout the region but at different rates. The disease attacks all banana cultivars and can cause up to 100% yield losses at farm level if effective control measures are not put in place. However, limited information on impact of BXW at regional level is available to guide interventions. Thus, this study assessed the impact of BXW on farmers’ livelihoods in Kagera basin of Tanzania, Burundi and Rwanda. A total of 436 households (Tanzania 120, Burundi 208 and Rwanda 108) mostly from major banana-producing and BXW-affected districts were sampled and interviewed in a household survey. Thirty-three to seventy-five of the total banana mats per farm in the three countries were infected with BXW. Banana production losses caused by BXW were valued at US$10.2 million and US$ 2.95 million in Tanzania and Rwanda, respectively, banana sales by farmers dropped by 35% while bunch prices unpredictably doubled. Since banana is a key component of these farming communities, the banana production losses resulted in significant reduction in household food security and incomes. To cope with these challenges, most households are diversifying into other food crops such as maize, cassava and sweet potatoes. This poses a number of socio-economic and biological implications that require further investigation

Dietary options to reduce the environmental impact of milk production

A range of options was explored to test the hypothesis that diets for dairy cows could be formulated to reduce the carbon footprint (CFP) of feed, increase efficiency of conversion of potentially human-edible feed into milk, increase nitrogen use efficiency (NUE) and reduce methane (CH4) emissions per kg milk. Diets based on grazed grass, grass silage, maize silage or straw, supplemented with raw material feeds, were formulated to meet requirements for metabolizable energy and metabolizable protein for a range of daily milk yields. At similar levels of milk yield, NUE, predicted CH4 emissions and diet CFP were generally higher for diets based on maize silage than for those based on grazed grass, grass silage or straw. Predicted CH4 emissions and human-edible proportion decreased, while NUE increased with the increasing level of milk yield. It is concluded that there is potential to reduce the environmental impact of milk production by altering diet formulation, but the extent to which this might occur is likely to depend on availability of raw material feeds with low CFPs

Effect of intercropping sunflower with soybean at different interrow and intra-row spacing on land use efficiency

Sunflower (Helianthus annuus L.) and soybean (Glycine max) were relatively new crops of economicsignificance in Uganda before 1990s compared to traditional cash crops such as cotton, tea andcoffee. By 2000 many smallholder farmers in the Mid-Northern Agro-ecological Zone of Ugandastarted planting sunflower and soybean as sources of household income. However, sunflower andsoybean are planted in same piece of land using different planting patterns that may lead todifferences in yields. This study evaluated the effect of inter-row and intra-row spacing on yieldsof sunflower and soybean intercrop. A 4 x 4 factorial experiment in a randomized complete blockdesign was used to determine performance of sunflower and soybean under four inter-row spacings(75, 90, 105 and 120 cm) and four intra-row spacings (30, 40, 50 and 60 cm) and sole sunflower andsole soybean. Under intercrop, a ratio of 1:1 sunflower/soybean was used. Sole sunflower wasplanted at 90 cm x 30 cm; while sole soybean was planted at 50 cm x 25 cm. Mean yields ofsunflower from intercrop were 2517 and 1219 kg ha-1, compared to 3241 and 1655 kg ha-1 from solesunflower at Acwec Omio and Ngetta Zonal Agricultural Research and Development Institute(NgeZARDI), respectively. Yield of soybean was 1100 and 2978 kg ha-1 (p<0.01), compared to 3364and 2590 kgha-1 from sole soybean at Acwec Omio and NgeZARDI, respectively. The highest LandEquivalent Ratios (LER) were 1.29 at inter-row spacing of 90 cm between rows and 1.25 at intrarow spacing of 30 cm within rows. The lowest LER of 0.8 was from 120 cm x 60 cm spacing. Anintercrop between sunflower and soybean at a spacing of 90 cm between rows and 30 cm withinrows, was the most appropriate, since LER were above 1.2, an indication that land was efficientlyutilized. Sunflower can be intercropped with soybean, enabling farmers to raise income bycultivating two crops in same piece of land, above all conserve the fertility of land

Elemental composition and potential health impacts of phaseolus vulgaris L. ash and its filtrate used for cooking in Northern Uganda

Ash from burnt crop residue of common bean (Phaseolus vulgaris L.) is typically used to generate filtrate in rural Northern Uganda. The filtrate is added to hard-to-cook foods, like dried legumes, to decrease cooking time and improve flavor. However, the elemental composition of ash filtrate and health implications of its use is poorly understood. This study aimed to determine the elemental composition of Phaseolus vulgaris L. ash and its filtrate, to identify variation among study sites, and to assess the potential health impact of ash filtrate consumption in Northern Uganda. Dried ash and ash filtrate samples of P. vulgaris from Dog Abam, Telela, Arok, and Tit villages in Northern Uganda were analyzed for chemical composition. Ash filtrate samples were procured from ash according to local methods. Nutritional impact was assessed by comparing recommended daily intake (RDI) guidelines for Canada and Uganda. Potassium (K), sodium (Na), magnesium (Mg), manganese (Mn), and iron (Fe) concentration in dry crop ash samples varied significantly among study sites. Ash filtrate contained lower concentrations of all elements, suggesting considerable losses through filtration; but showed an alkaline pH (10.1 to 10.8). Elemental concentration present in probable daily intake of ash filtrate (approximately 15 milliliters/person) was within acceptable RDI ranges for elements of known dietary importance. The alkaline pH levels of the ash filtrate may have potential negative effect on diet by decreasing bioavailability of specific minerals (for example, Fe and Zn) and/or having destructive effects on various nutrients (for example thiamine). Further research should be conducted in Northern Uganda and other areas where ash filtrate is in use to determine the specific health effects of this cultural practice. Such studies could include, but not limited to, biological analysis, detailed nutritional studies, and/or long-term monitoring of filtrate consumers. The information gathered from such studies could be critical in formulating appropriate policies regarding the use of ash filtrate.Key words: Food composition, nutrients, Phaseolus vulgaris L. ash filtrate, potential health problem, Ugand

Socio–economic benefits and pollution levels of water resources, Pece Wetland, Gulu Municipality - Uganda

Communities are dependent on wetlands resources for income generation. However, anthropogenic activities that result into pollution of water are one of the major public health problems. Assessment of socio–economic activities and pollution levels of domestic water sources in Gulu Municipality, Pece wetland was done. The technique for socio–economic data collection was an exploratory method using transect walk along the wetland. Questionnaires and interviews were used. Domestic water sources around the wetland were sampled and analyzed according to APHA (1992). The major activities in the wetland were edge gardening, waste disposal, petty business center called ‘Owino’ market, water collection for sale, livestock grazing, agro–forestry, brick laying, papyrus harvesting and vehicle washing. The climax of some of the activities was affected by seasons. Over all, the activities contributed to > 50% of the monthly income of the respondents. A section of the wetland seems to be sacrificed for socio–economic activities due to the prevailing insecurity as evidenced in the unclear coordination and monitoring plan for conservation of the wetland. Temperature was not significantly different (p = 0.672) and pH was significantly different (p = 0.000). The values ranged from 23.4 to 26.0°C and 5.37 to 5.83 for all the water sources respectively. There was significant difference (p = 0.00 and p = 0.03) in EC and TSS that ranged from 52 to 330 μScm-1 and 0.89 to 2.93 mgL-1 respectively. Spring water had higher EC and TSS than the boreholes. Faecal coliforms ranged from 14 to 50 CFU/100 ml and was significantly higher (p = 0.006) for the spring water than the boreholes. The chloride ion concentration was significantly different (p = 0.000) in the water sources and ranged from 89.2 to 331.1 mgL-1. The correlation for faecal coliforms and chloride ions was positive (r = 0.3577). The domestic water sources were contaminated, although the assumption in the community is that, boreholes are clean and safe. The communities should be sensitized to treat water before drinking. This could reduce the chances of infection by the pathogenic organisms.Key words: Benefits, pollution, water sources, wetlands, socio–economics

ELEMENTAL COMPOSITION AND POTENTIAL HEALTH IMPACTS OF Phaseolus vulgaris L. ASH AND ITS FILTRATE USED FOR COOKING IN NORTHERN UGANDA

ABSTRACT Ash from burnt crop residue of common bean (Phaseolus vulgaris L.) is typically used to generate filtrate in rural Northern Uganda. The filtrate is added to hard-to-cook foods, like dried legumes, to decrease cooking time and improve flavor. However, the elemental composition of ash filtrate and health implications of its use is poorly understood. This study aimed to determine the elemental composition of Phaseolus vulgaris L. ash and its filtrate, to identify variation among study sites, and to assess the potential health impact of ash filtrate consumption in Northern Uganda. Dried ash and ash filtrate samples of P. vulgaris from Dog Abam, Telela, Arok, and Tit villages in Northern Uganda were analyzed for chemical composition. Ash filtrate samples were procured from ash according to local methods. Nutritional impact was assessed by comparing recommended daily intake (RDI) guidelines for Canada and Uganda. Potassium (K), sodium (Na), magnesium (Mg), manganese (Mn), and iron (Fe) concentration in dry crop ash samples varied significantly among study sites. Ash filtrate contained lower concentrations of all elements, suggesting considerable losses through filtration; but showed an alkaline pH (10.1 to 10.8). Elemental concentration present in probable daily intake of ash filtrate (approximately 15 milliliters/person) was within acceptable RDI ranges for elements of known dietary importance. The alkaline pH levels of the ash filtrate may have potential negative effect on diet by decreasing bioavailability of specific minerals (for example, Fe and Zn) and/or having destructive effects on various nutrients (for example thiamine). Further research should be conducted in Northern Uganda and other areas where ash filtrate is in use to determine the specific health effects of this cultural practice. Such studies could include, but not limited to, biological analysis, detailed nutritional studies, and/or long-term monitoring of filtrate consumers. The information gathered from such studies could be critical in formulating appropriate policies regarding the use of ash filtrate

Splanchnic venous thrombosis driven by a constitutively activated JAK2 V617F philadelphia-negative myeloproliferative neoplasm: a case report

Introduction: Splanchnic venous thrombosis (SVT) has varied etiology with Philadelphia-negative myeloproliferative neoplasms (MPNs) being the most frequent underlying prothrombotic factor. Hematological indices often remain within normal range because of portal hypertension and its sequelae, causing diagnostic challenges. The high frequency of JAK2 mutation among patients with SVT reinforces the diagnostic utility of JAK2 V617F testing.Case report: We report a case of a 62-year-old black man with progressive abdominal swelling and features of decompensated chronic liver disease found to have SVT-portal vein thrombosis and how JAK2 V617F was useful in unmasking an underlying myeloproliferative neoplasm.Conclusion: A high index of suspicion for an underlying prothrombotic factor is critical for patients presenting with thrombosis in unusual sites. This is useful in prognostic stratification and patient outcomes. JAK2 mutation screening is now part of the standard diagnostic workup in SVT.Keywords: venous thrombosis, myeloproliferative neoplasm

Client orientation of agricultural research in Uganda: the Namulonge experience

In the 1960’s andl970’s research in Uganda and other developing countries was top down approach where the technology was developed on research stations by researchers and then turned over to extension for demonstration and diffusion to farmers. Farmers were not consulted on what type of technologies were suited to their systems. Hence there was a catch-phrase in agricultural development i.e “yield gap”. Farmers could not attain yield comparable to those at experiment stations. Therefore due to those problems an important trend in the last decade has been increasing attention paid to the client i.e client orientation. The gap now is between the research-clients. There is therefore need to close this gap i.e researcher-client gap. It has been shown that to be successful agricultural research has to respond to demand for assistance in solving agricultural problems. This paper presents how Namulonge Agricultural and Animal Production Research Institute (NAAR1) through its different research programmes has addressed the gap between researchers and the clients. It is the experiences through this work that is presented in form of case studies