Evaluation of symbiotic effectiveness and size of resident Rhizobium leguminosarum var. viciae nodulating lentil (Lens culinaris medic) in some Ethiopian soils

This study was initiated to isolate, characterize and select symbiotically effective rhizobia nodulating lentil (Lens culinaris medic) and to enumerate of indigenous rhizobia nodulating lentil in some Ethiopian soils. More than 84nodule and soil samples were collected. In sand culture, only 62 isolates were authenticated as rhizobia nodulating lentil. Analyses of variance indicated that most […]

Response of tomato metabolism to manures and fertilizers

Tomato (Latin-juicy wolf peach) is a popular, versatile, easily grown plant with a great tasting fruit. Originally cultivated during prehistoric times by the Indians in South America, they were long believed to be poisonous. But now tomato is the favourite of home vegetable gardeners and is widely cultivated and used throughout the world. In this […]

Status of selected physicochemical properties of soils under different land use systems of Western Oromia, Ethiopia

Land use change particularly from natural ecosystem to agricultural lands in general and to crop cultivation under poor management practices in particular are among the major causes of decline in soil fertility followed by land degradation and low agricultural productivity. Achieving scientific information thereof is vital for planning management strategies; this study assessed the effects […]

Carnitine, metabolism and its pharmacokinetic significance

Carnitine is an essential nitrogenous nutrition that is facilitates transport of branched-chain fatty acid into mitochondria. This substrate has to potential role in energy production during fetus, newborn and adult years. The carnitine vital role is important in improving of some diseases such as diabetic, hemodyalis, HIV, carnitine genetic deficiency, man infertility, weight loss and […]

Antagonistic activities of Pseudomonas fluorescens and strain improvement of Rhizobium species

The Pseudomonas fluoruescens Migula is a well known soil borne and non pathogenic biological control agent. P. fluorescens has been found to show inhibition to the phytopathogens of Rhizoctonia solani Kuhn, Bipolaris oryzae Shoemaker, Cochliobolus lunatus Nelson, Alternaria brassica Berk, Aspergillus niger Van Tiegh, Fusarium oxysporum Schlechtendal and Trichothecium roseum Link. The antagonistic activity of […]

Impact of biomass burning activities on physicochemical properties of nitisol in Southwestern Ethiopia

Burning of biomass for charcoal production and land preparation is common in Ethiopia. However, the analysis of the impacts of these practices on soil physical and chemical properties is seldom examined. Therefore to investigate the impact of biomass burning on selected soil properties, composite and core soil samples were collected at a depth of 0–20cm […]

Production of pectinase by Aspergillus niger cultured in solid state media

Solid state fermentation was carried out with 7 fungal strains, obtained from different sources. Among 7 isolates Aspergillus niger, IM-6 was found as effective pectinase producer. Maximum enzymatic activity (142.44U/gm) was observed after 7 days incubation at 40˚C temperature in 750 ml conical flask. In this study 1.69% (NH4)2SO4 was used as nitrogen source, although […]