Analysis of Trends in Vegetation Avhrr-Ndvi Data Across Sokoto State 1982 – 1986 Using Remote Sensing and GIS

The current situation in vegetation productivity across Nigeria and indeed in Sokoto State is being affected by climatic change and other unfavourable environmental conditions. Time-series Remotely Sensed data within Geographic Information System (GIS) environment can be utilized to timely monitor the trajectory in vegetation productivity and dynamics in environmentally unstable areas across the state. In this study, dekadal Normalised Difference Vegetation Index (NDVI) data derived from the National Oceanic Atmospheric Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) Pathfinder (PAL) dataset was utilised in monitoring trends in vegetation NDVI productivity for 5-year growing seasons (July, August and September) within seven selected sites of irrigated and rainfed croplands across Sokoto State from 1982 to 1986. Ground truthing was conducted using Global positional System (GPS) and digital camera to establish typical status of the individual selected sites and evaluated with the IDRISI-ANDES GIS software. Profiles of the monitored sites were plotted using Excel Spreadsheet. Results have shown that shelter belts within the study area have high variability in vegetation NDVI productivity in all the growing season months compared to the irrigated and rain-fed cropland sites. Although studies have shown that NDVI from AVHRR has strong correlations with rainfall and net primary productivity particularly in the arid and semi arid areas, the month of July 1985, August 1985 and September 1984 had shown very low vegetation NDVI productivity in all the sites monitored compared to the productivity of the preceding months. This is likely to be connected to the Elnino Southern Oscillations (ENSO) warm phase (changes in sea surface temperature) which other studies have shown that it affected the world primary net production (NPP). Keywords: Vegetation, Changes, Remote Sensing and GI

Bacteriological and chemical properties of soil amended with fermented poultry bird feather

Huge amount of poultry wastes are generated annually in developing nations, of which end up in our environment. Feather as a poultry waste have caused environmental concerns in many of these countries. In this research work, poultry feather was used to study its effects on bacteriological and chemical properties in agricultural soil. The feathers collected were grinded, sterilized and fermented before mixing it with soil. Total heterotrophic counts of colonies were enumerated from the soil samples. Isolates were characterized based on morphological and series of biochemical tests. Soil chemical analysis for pH, carbon, nitrogen, phosphorus, calcium, potassium was also carried out. The heterotrophic bacteria count of the treated soil had the highest count in the range of 1.54 x106 to 2.02 x106 (CFU/g) as against the control soil with 1.24 x106 (CFU/g). The bacteria identified from these samples were Bacillus sp., Proteus sp., Staphylococcus sp. and Actinomyces sp. Actinomyces sp. was isolated only after three weeks of treatment with the feather while all other bacteria were also present in the control soil but at elevated levels based on heterotrophic bacteria count in the treated soil. The soil chemical analysis of the treated soil had high amount of mineral (Organic carbon 1.10 %, nitrogen 0.09%, phosphorus 0.53±0.02 mg/kg, magnesium 0.45±0.01 mg/kg as against the control (Organic carbon 0.26%, nitrogen 0.05%, phosphorus 0.30±0.10 mg/kg, magnesium 0.45±0.01 mg/kg) and their pH is almost near neutrality, 7.12 and 7.08 respectively. The result suggested that soil treated with poultry feather increased the plate count of Bacillus sp, Proteus sp, Staphylococcus sp and Actinomyces sp. Poultry feather which is a waste by-product can provide essential nutrients for the survival of soil microorganisms, plant growth and therefore can be exploited as biofertilizer.Keywords: Bacillus sp., biofertilizer, fermentation, keratin, poultry wast

Post-harvest management and associated food losses and by-products of cassava in southern Ethiopia

Improved (high yield and disease resistant) cassava varieties were introduced into Ethiopia around the onset of the twenty-first century, as a potential food security crop. At present, limited information is available from the country on post-production aspects of the value chain (VC) and related food losses. The lack of such data prevents policymakers and VC actors from taking steps towards improving VC efficiencies, which can have a significant impact on livelihoods and food security. The focus of this study was to examine the prevailing post-harvest practices in the cassava VC in southern Ethiopia and quantify the extent of food losses and associated by-products in the framework of the recently developed ‘food loss and waste protocol’. The majority of the cassava in the study area was processed into dry chips and milled into a composite flour with teff and maize to prepare the staple bread (injera). ‘Critical loss points’ were during sun-drying (4%) and stockpiling at farm and marketplace (30–50%). Insect pest damage was primarily responsible for food losses at farm and market level. The most important insect species infesting dry cassava were identified during the survey. As far as the by-products were concerned, the ratio of leaf:wood (stem and stump):starchy root on a dry matter basis at harvest was 1:6:10. Further emphasis should be on improving processing and storage technologies to reduce food losses and the better recovery and utilisation of by-products, especially the leaves of cassava, which could be a potential source of protein in human diets

Prescribed burning and its effect on plant biomass and species diversity in savanna ecosystem, Sokoto, Nigeria

Three burning regime (fire protected, early burning, late burning) and their effects on plant biomass and species diversity in Dabagi forest Reserve of Sokoto State were investigated. Prescribed burning was carriedout on randomly selected plots (10 m x 10 m) in November (early burn) and March (late burn) 2004. The design of experiment was a Randomized Complete Block Design (RCBD) and the burning treatments werereplicated three times. The data obtained were analyzed using analysis of variance. The diversity index of the shrubs species was higher (

Antenatal dexamethasone for improving preterm newborn outcomes in low-resource countries: a cost-effectiveness analysis of the WHO ACTION-I trial

Background: After considerable debate, there is now unequivocal evidence that use of antenatal corticosteroids improves outcomes in preterm neonates when used in women at risk of early preterm birth in reasonably equipped hospitals in low-resource countries. We aimed to evaluate the cost-effectiveness of dexamethasone administration in the management of preterm birth in a cohort of pregnant women from five low-resource countries. Methods: We performed a cost-effectiveness analysis using data from 2828 women (and 3051 babies) who participated in the WHO ACTION-I trial, a multicentre, randomised, placebo-controlled trial that assessed the safety and efficacy of dexamethasone in pregnant women at risk of early preterm birth in 29 hospitals across Bangladesh, India, Kenya, Nigeria, and Pakistan. We used a decision tree model to assess the cost-effectiveness of dexamethasone treatment compared with no intervention from a health-care sector perspective. Outcome data were taken from the primary results of the trial and primary data on cost were collected in 28 hospitals. The primary cost-effectiveness outcome was cost per neonatal death or the cost per disability-adjusted life-years (DALYs) averted, or costs saved per 1000 woman–baby units if the intervention was found to be cost-saving. Findings: Administration of dexamethasone averted 38 neonatal deaths per 1000 woman–baby units and 1132 DALYs per 1000 woman–baby units. Compared with no intervention, use of antenatal corticosteroids was cost-saving in all five countries, ranging from a saving of US$1778 per 1000 woman–baby units (95$20 531 per 1000 woman–baby units (–46 387 to 4897) in Pakistan, to $36 870 per 1000 woman–baby units (–61 569 to –15 672) in Bangladesh, to$38 303 per 1000 woman–baby units (–64 183 to –10 753) in India, and to $53 681 per 1000 woman–baby units (–113 822 to 2394) in Kenya. Findings remained consistent following sensitivity analyses. In all five countries, dexamethasone was more effective and cost less compared with no treatment. Interpretation: Antenatal dexamethasone for early preterm birth was cost-saving when used in hospitals in low-resource countries. Decision makers in low-resource settings can be confident that use of antenatal dexamethasone for early preterm birth is cost-effective, and often cost-saving when used in reasonably equipped hospitals in low-resource countries. Funding: Bill & Melinda Gates Foundation and WHO