Journal articles Open Access Variations in Soil Chemical Properties, Bacteria and Fungi Populations Along Slope Positions and Profile Depths in Terraced and Non-terraced Lands of Rwanda highlands A. Fashaho · J.J. Lelei · A. O. Musandu · S.M. Mwonga +1 more The objective of the current study was to evaluate the effect of terracing on soil chemical and biological properties in the Rwanda highlands. The study was done in March 2017. Composite soil samples were collected from the top, middle and… RUF-38418 2019 CC BY 4.0 30 Jul 2020
Working Document Series Open Access The atmospheric deposition of phosphorus and nitrogen on Lake Kivu M. Bagalwa · H.A. Bootsma · F. Kansiime · K. Karume +2 more Phosphorus and nitrogen are most often identified as the nutrients limiting algal biomass and productivity in aquatic ecosystems. Sources of new nutrients for lakes include riverine input, atmospheric deposition, N fixation, and occasional… RUF-37164 2016 CC BY 4.0 20 Sep 2017
Working Document Series Open Access Productivity of Solanum potato varieties and their yield responses to nitrogen fertilizer application rates in Eastern Rwanda C. Karemangingo Potatoes (Solanum tuberosum L.) is an important crop widely grown in cool and high moist conditions of Rwanda. This study explored the productivity of different potatoes varieties under increasing nitrogen fertilizer application rates in d… RUF-37017 2016 CC BY 4.0 18 Sep 2017
Working Document Series Open Access Maize yield in Sudan as influenced by inorganic and organic fertilizers A.A.A. Ala · M.M. Lubna · A. M. E. Nagat · A.E.A. Nura +1 more The main objective of this research was to investigate the effect of chemical fertilizer, organic fertilizer and a combination of the two on maize (Zea mays L.) yield in Sudan. Three levels of fertilizer: 86 kgN/ha, 4 tonnes chicken manure… RUF-36983 2016 CC BY 4.0 18 Sep 2017
Journal articles Open Access Nutrient status of soils from farmers’ maize fields in mid altitude areas of Western Ethiopia Tolera Goshu Abera · Tolessa Debele · Haekoo Kim · Ernest Semu +1 more Inappropriate land use can deplete nutrient contents of crop land that leads to reduce nutrient concentrations and productivity. However, monitoring nutrient status of crop land can help producer take appropriate remedial measures before s… RUF-35735 2015 CC BY 4.0 16 Nov 2015
Theses & Dissertations Open Access Effect of organic and inorganic nitrogen sources on growth, yield and oil content of sunflower grown in highly weathered soils of Morogoro Mwahija Almasi Irika Sunflower contributes about 40% of total national cooking oil requirement in Tanzania, ranking as one of the most important cooking oil with very high nutritional value. However, its production per unit area ranges between 800 and 1100 kg/… RUF-35636 2015 CC BY 4.0 8 Oct 2015
Journal articles Open Access Quality assessment of fresh lake Malawi tilapia (chambo) collected from selected local and super markets in Malawi Jeremiah Kang’ombe · F. Kapute · C. Kiiyukia · Jeremy Likongwe +1 more The aim of this study was to assess quality of Lake Malawi Tilapia (local name: Chambo) from local and super markets in Malawi. Fish from local markets hadsignificantly higher numbers of viable bacteria counts(9.5×108CFU/g, cm2) (P<0.01… RUF-35587 2012 CC BY 4.0 6 Oct 2015
Theses & Dissertations Open Access Row arrangement and nitrogen effects on growth yield of sorghum-legume intercrops Charles Owuor Sorghum [Sorghum bicolor L. Moech] production in eastern Uganda is largely done in intercrops with legumes, especially beans [Phaseolus vulgaris], groundnuts [Arachis hypogea], Pigeon pea [Cajanus cajan] and Cowpea [Vigna unguiculata L. Wa… RUF-35495 2005 CC BY 4.0 29 Sep 2015
Theses & Dissertations Open Access A study of the effects of Nitrogen , phosphorus and potassium fertilizers on the dry matter yield and chemical composition of amaranthus hybridus sub-species hybridus (green head) Ekwamu Adipala Plots of amaranthus hybridus sub-species hybridus (green head) were treated with N, P, and K fertilizers and sampled at a six day interval from day 42 to day 60 after sowing to determine the effect on DM yield and the resultant chemical co… RUF-35445 1980 CC BY 4.0 25 Sep 2015
Theses & Dissertations Open Access Critical shoot Nitrogen curve for potato varieties Asante and Tigoni in Kenya Mugo James Njeru Potato is a major crop in Kenya with its production area increasing as a result of people opting for potatoes than other crops. The production is however lower than what is expected due to several challenges, among them being low fertility… RUF-35338 2013 CC BY 4.0 21 Sep 2015
Working Document Series Open Access Development of plant nutrient efficient use sorghum varieties to support livelihood strategies of East African farmers S. Gudu · P. Okori Seventy five percent of the over 100 million people in Eastern and Central Africa region live in marginal areas and are dependent on agriculture. Agricultural productivity in those areas is mainly low resource based and suffer especially f… RUF-35233 2010 CC BY 4.0 17 Sep 2015
Working Document Series Open Access S1 and S2 selection of Longe 4 maize variety for tolerance to low soil nitrogen in Uganda G. Asea · R. Edema · P. Gibson · P. Namugga Low nitrogen is a major environmental stress leading to low yields in maize. Identification of varieties able to perform well under low soil N is of great significance to the resource poor farmers in the country especially when input costs… RUF-35227 2010 CC BY 4.0 17 Sep 2015
Working Document Series Open Access Optimisation of rhizobium and arbuscular mycorrhizal fungi benefits for grain legume production in acid soils M. C. Rwakaikara-Silver · J.S. Tenywa · M. Uwizerwa This study was conducted to evaluate the symbiotic effectiveness of Rhizobium isolates using soybean and Phaseolus bean as host plants grown in acid soil (pH 4.5 and 5) from two southern districts of Rwanda. For this purpose, 10 and 33 iso… RUF-35120 2010 CC BY 4.0 16 Sep 2015
Working Document Series Open Access Effects of agricultural commercial products (microbial and non microbial) in relation to maize and soybean yields in western Kenya M. Mburu · J.R. Okalebo · C.O. Othieno This study was undertaken to assess the effect of different inoculants on nodule formation and legume yield. On farm experiments were carried out in Bungoma district of western Kenya with treatments arranged in RCBD design with single repl… RUF-35080 2010 CC BY 4.0 16 Sep 2015
Working Document Series Open Access Feedlot performance of dorper wether lambs fed Opuntia-based diets with different nitrogen sources H.O. de Waal · J. Els · L. Schwalbach · K.L. Shiningavamwe The performance and carcass characteristics of 45 Dorper wether lambs fed Opuntia-based diets with different nitrogen (N) sources were evaluated in the feedlot. Lambs were weighed weekly to determine the ADG and slaughtered when they reach… RUF-34951 2010 CC BY 4.0 14 Sep 2015
Working Document Series Open Access Technology adoption by smallholder farmers: Lessons from the soyabean research/promotion program in Zimbabwe S. Mpepereki Agricultural research programs in universities in sub-Saharan Africa generate technologies few of which are adopted by the smallholder farmers. A technology that demands significant additional inputs be they financial or physical is less l… RUF-34943 2010 CC BY 4.0 14 Sep 2015
Working Document Series Open Access Determination of milk components lost in whey during the manufacture of three cheese types P.T. Banda · C.T. Ndavambi · W. Parawira A small-scale farm in Harare processes soft goat cheese from goat milk and feta and gouda cheese from jersy cow milk. Milk constituents were measured in milk and as residual components in whey after processing cheese. Residual phosphorus a… RUF-34940 2010 CC BY 4.0 14 Sep 2015
Working Document Series Open Access Effect of fecal manure from cattle fed Calliandra, Gliricidia and Luecaena browse/maize silages on soil productivity F. B. Bareeba · H. Kato · E. N. Sabiiti Browses have tannins and lignin which bind protein N and fiber and could subsequently affect release of manure nutrients in the soil when fed to animals. In this experiment, which was a pot experiment, cattle fecal manure from browse/maize… RUF-34733 2010 CC BY 4.0 10 Sep 2015
Working Document Series Open Access Effect of nitrogen and phosphorous rates and sources on grain and forage yield of maize in river Nile State A. Abd Elrahman · Ezeldeen Ahmed The study was conducted at two locations, namely, Hudeiba Research Station Farm (moderately fertile soil) and Matera (poor soil) in River Nile State for two seasons between 20082010. The objective of the study was to investigate the effect… RUF-34716 2010 CC BY 4.0 10 Sep 2015
Working Document Series Open Access Improving biological nitrogen fixation (BNF) by groundnuts grown in acid soils through amendment with calcitic and dolomitic limestones R. Merckx · J.K. Ogega · J.R. Okalebo · D.K. Okello +5 more Groundnut (Arachis hypogeal L.) is an oil crop legume capable of symbiotic nitrogen fixation. Soil acidity is a major limitation to symbiotic nitrogen fixation. Acid soils are widespread in Western Kenya and Eastern Uganda where groundnut … RUF-34659 2010 CC BY 4.0 9 Sep 2015
Working Document Series Open Access Farmer - managed trials for evaluation of rhizatech and legumefix in Bungoma district Kenya C. Majengo · W. Ngetich · J.R. Okalebo · C.O. Othieno The nitrogen reserve of agricultural soils must be replenished periodically in order to maintain an adequate level for crop production. This replacement of soil nitrogen is generally accomplished by the addition of fertilizers or as produc… RUF-34615 2010 CC BY 4.0 8 Sep 2015
Working Document Series Open Access Assessment of soil and landform characteristics for implementation of conservation agriculture in West Usambara Mountains, Lushoto District, Tanzania D. Kimaro · L.A. Kyaruzi · H.B. Msita Developing strategies that promote conservation agriculture in the West Usambara Mountains in Tanzania poses a particular challenge. This research used empirical and qualitative method to assess soil and landform characteristics in relatio… RUF-34613 2010 CC BY 4.0 8 Sep 2015
Working Document Series Open Access Biological N2 fixation of three Acacia senegal varieties in the drylands of Kenya using 15N natural abundance method E.W. Githae A study is on-going in Kenya to identify Acacia senegal varieties with high symbiotic biological N2 fixation capacity. Balanites aegyptica, a non-legume species, has been included for comparison. Variety senegal has so far shown the highes… RUF-34584 2010 CC BY 4.0 8 Sep 2015
Working Document Series Open Access Combining ability and performance of maize hybrids under low nitrogen and drought stress G. Asea · R. Edema · A. Nyombayire The main objective of this study was to develop maize genotypes that perform well under drought and low-nitrogen stresses. Twelve parents were crossed in a half-diallel mating design. The resultant F1 hybrids were evaluated in four environ… RUF-34506 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Effect of varying Desmodium and maize harvesting regimes on their yields and growth attributes within the “Push- Pull” intercropping systems in Western Kenya Z. Khan · M. N. Koech · J.R. Okalebo · C.O. Othieno +3 more This study tested the hypothesis that inclusion of Desmodium spp. into maize cropping system under the push-pull technology enhanced crop growth and yield. Field trials were conducted in Siaya and Busia districts of western Kenya with the … RUF-34388 2010 CC BY 4.0 20 Aug 2015
