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Journal articles on the topic 'Rice – Yields – Kenya'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Nyang’au, W. O., B. M. Mati, K. Kalamwa, R. K. Wanjogu, and L. K. Kiplagat. "Estimating Rice Yield under Changing Weather Conditions in Kenya Using CERES Rice Model." International Journal of Agronomy 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/849496.

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Effects of change in weather conditions on the yields of Basmati 370 and IR 2793-80-1 cultivated under System of Rice Intensification (SRI) in Mwea and Western Kenya irrigation schemes were assessed through sensitivity analysis using the Ceres rice model v 4.5 of the DSSAT modeling system. Genetic coefficients were determined using 2010 experimental data. The model was validated using rice growth and development data during the 2011 cropping season. Two SRI farmers were selected randomly from each irrigation scheme and their farms were used as research fields. Daily maximum and minimum tempera

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SILVA, JOÃO VASCO, and JOSHUA J. RAMISCH. "WHOSE GAP COUNTS? THE ROLE OF YIELD GAP ANALYSIS WITHIN A DEVELOPMENT-ORIENTED AGRONOMY." Experimental Agriculture 55, no. 2 (2018): 311–38. http://dx.doi.org/10.1017/s0014479718000236.

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SUMMARYYield gaps have become a useful tool for guiding development-related agronomy, especially in the global South. While critics have challenged some aspects of the yield gap methodology, and the relevance of food security advocacy based on yield gaps, very few studies question the actual relevance, application and scalability of yield gaps for smallholder farmers (and researchers) in the tropics. We assess these limitations using two contrasting case studies: maize-based farming systems in Western Kenya and rice-based farming systems in Central Luzon, the Philippines. From these two cases,

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3

Veldkamp, A. "Quantitative land evaluation of the Chuka-South area, Kenya." Netherlands Journal of Agricultural Science 36, no. 1 (1988): 105–7. http://dx.doi.org/10.18174/njas.v36i1.16701.

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Evaluation of land in the Chuka-South area of central Kenya indicated that there was ample scope for yield increase. Calculated water-limited yield potentials for maize, sorghum, tobacco, cotton, soyabeans, cassava, sweet potatoes, potatoes, rice, Pennisetum americanum, Cajanus cajan and Vigna unguiculata were far above actual yields. Nutrient-limited yield potentials were roughly half the water-limited yield, i.e. natural soil fertility of the Chuka-South area was low. The effects on yield levels of alternative water conservation measures were evaluated for the eastern half of the area. The e

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Cheboi, Pius, Shahida Siddiqui, Japheth Onyando, Clement Kiptum, and Volker Heinz. "Effect of Ploughing Techniques on Water Use and Yield of Rice in Maugo Small-Holder Irrigation Scheme, Kenya." AgriEngineering 3, no. 1 (2021): 110–17. http://dx.doi.org/10.3390/agriengineering3010007.

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The objective of this study was to determine the effect of paddy rice ploughing techniques on water use and the yield of rice crop, as well as water use efficiency for rice growing in small-holder irrigation schemes. The study was conducted at a farmer’s field in Powo B sub-block of Maugo Irrigation Scheme. The period of study was from July 2019 to January 2020, which is the rice season. The experimental site was located in the vicinity of Olare Shopping Centre, Kamenya Sub-location, Kochia East Location, Kochia Ward, Rangwe Sub-County, Homa Bay County, Nyanza Region, Kenya in Maugo rice schem

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5

Kadipo Kaloi, Francis, Hezron Nyarindo Isaboke, Charles Nyambane Onyari, and Lucy Karega Njeru. "Determinants Influencing the Adoption of Rice Intensification System among Smallholders in Mwea Irrigation Scheme, Kenya." Advances in Agriculture 2021 (March 15, 2021): 1–8. http://dx.doi.org/10.1155/2021/1624334.

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Rice farming has received considerable attention in developing countries and particularly in Kenya due to its impact on smallholders’ income and food security. Irrigated rice is the largest consumer of water, and its sustainability is threatened by water shortage. This has necessitated the development of alternative irrigation water technologies, such as the system of rice intensification (SRI), which are efficient in water use with improved yields. This study analyzed the determinants of adoption of SRI in the Mwea Irrigation Scheme where stratified sampling was used to obtain 364 smallholder

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6

Omwenga, Kepha G., Bancy M. Mati, and Patrick G. Home. "Determination of the Effect of the System of Rice Intensification (SRI) on Rice Yields and Water Saving in Mwea Irrigation Scheme, Kenya." Journal of Water Resource and Protection 06, no. 10 (2014): 895–901. http://dx.doi.org/10.4236/jwarp.2014.610084.

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7

Momanyi, Kennedy Moseti, James Wanjohi Muthomi, and John Wangai Kimenju. "Fusarium Wilt of Banana in Kisii County, Kenya." Current Agriculture Research Journal 9, no. 1 (2021): 16–26. http://dx.doi.org/10.12944/carj.9.1.03.

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Banana categorized as third in world’s key starch crops after cassava and sweet potatoes and it is the fourth most widely grown crop after rice, wheat and maize. The crop accounts for over 70 % of farmer’s earnings in Kisii county of Kenya. Farmers growing the crop are facing several challenges including depletion of soil fertility, low yields and diseases especially Fusarium wilt caused by Fusarium oxysporum f.sp. cubense (Foc). A study was conducted to determine the status of this disease in Kisii County. Ten farms were sampled in each Agro-ecological zone and in each farm four symptomatic a

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8

Narita, Daiju, Ichiro Sato, Daikichi Ogawada, and Akiko Matsumura. "Integrating economic measures of adaptation effectiveness into climate change interventions: A case study of irrigation development in Mwea, Kenya." PLOS ONE 15, no. 12 (2020): e0243779. http://dx.doi.org/10.1371/journal.pone.0243779.

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As climate change adaptation is becoming a recognized policy issue, the need is growing for quantitative economic evaluation of adaptation-related public investment, particularly in the context of climate finance. Funds are meant to be allocated not to any types of beneficial investments with or without climate change but to projects regarded as effective for climate change adaptation based on some metrics. But attempts at such project-specific evaluation of adaptation effects are few, in part because such assessments require an integration of various types of simulation analyses. Against this

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9

M. Makone, Samson, Samson N. Maobe, Evans A. Basweti, and David K. Bunyatta. "Comparative Analysis of Crop Yields of Selected Crops (Maize, Rice and Kales) Before and After the Introduction of Irrigation Technologies in Kimira-Oluch Irrigation Schemes, Homa Bay County, Kenya." East African Scholars Journal of Agriculture and Life Sciences 3, no. 11 (2020): 378–82. http://dx.doi.org/10.36349/easjals.2020.v03i11.006.

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10

Dianga, Al-Imran, Kamau W. Joseph, and Ruth N. Musila. "Analysis of Combining Ability for Early Maturity and Yield in Rice (Genus: Oryza) at the Kenyan Coast." International Journal of Agronomy 2020 (October 22, 2020): 1–7. http://dx.doi.org/10.1155/2020/6230784.

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The main challenges facing rain-fed rice farming in Kilifi County at the Kenyan coast are inadequate and erratic rainfall, inadequate skills, and poorly developed infrastructure. Of great importance is erratic rainfall that tends to depress towards the end of long rain season, leading to crop failure. Combining ability analysis is one of the most valuable tools used to ascertain gene action effects and help in selecting desirable parents for making crosses and coming up with high yielding and early maturing lines. Combining ability for early maturity and yield has not been studied at the Kenya

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11

Bii, Lourine Chebet, Kahiu Ngugi, John M. Kimani, and George N. Chemining’ wa. "Genotype by environment analysis of rice (Oryza sativa L.) populations under drought stressed and well-watered environments." February 2020, no. 14(02):2020 (February 20, 2020): 259–62. http://dx.doi.org/10.21475/ajcs.20.14.02.p2112.

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In Kenya, the key abiotic stress affecting rice production is drought stress which is experienced mainly during reproductive phase of the crop. This study evaluated the performance of Kenyan rice populations including 19 generation of crosses, 6 parental and 5 checks under well-watered and drought stressed environment with the aim of identifying the phenotypic traits that confer drought tolerance in rice. The 19 generation of crosses were in F3 when they were evaluated in the short rains season and later advanced to F4 in the long rains season. Nineteen generation of crosses rice (Oryza sativa

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12

Rahab, Magoti, Mayumi Kikuta, George Chemining’wa, et al. "Growth of Rice Varieties in Different Kenyan Soil Types Under Water-Deficit Conditions." Journal of Agricultural Science 11, no. 6 (2019): 1. http://dx.doi.org/10.5539/jas.v11n6p1.

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The growth of 20 rice varieties, including both lowland and upland varieties, was evaluated in Kenya under well-watered and water-deficit conditions in four different soil types (black cotton, red clay, volcanic ash, and sandy clay) to compare the adaptability of these varieties to the two water regimes. Under water-deficit condition, after terminating irrigation, the reduction in soil water potential differed markedly according to soil type. The rice varieties tested were classified into four groups, which were largely consistent with differences in rice variety ecotype. We confirmed that low

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13

Banwo, O. O., M. D. Alegbejo, and M. E. Abo. "Rice yellow mottle virus genus Sobemovirus: a continental problem in africa." Plant Protection Science 40, No. 1 (2010): 26–36. http://dx.doi.org/10.17221/1350-pps.

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<I>Rice yellow mottle virus</I> genus <I>sobemovirus </I>(RYMV) was first reported in Kenya in 1966. The disease caused by this virus is fast becoming a major limiting factor in the rice production in Africa and neighbouring islands. It is known to occur in eastern, western and southern African countries and, since very recently, in Central Africa. It is transmitted by insect vectors such as <I>Chaectonema </I>spp., <I>Sesselia pusilla</I> Gerst. and <I>Trichispa sericea</I> Guerin (all <I>Coleoptera</I>) and also by mecha

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14

Muoni, Tarirai, Eric Koomson, Ingrid Öborn, et al. "Reducing soil erosion in smallholder farming systems in east Africa through the introduction of different crop types." Experimental Agriculture 56, no. 2 (2019): 183–95. http://dx.doi.org/10.1017/s0014479719000280.

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AbstractOn low-input smallholder farms of Kenyan upland landscapes, erosion of nutrient-rich topsoil strongly affects crop yields. Where maize (Zea mays) is intercropped on erosion-prone slopes, intercropping can potentially reduce soil erosion. The objective of this research was to quantify the contribution of crops and crop mixtures of different growth habits to erosion control and their influence on above-ground biomass and earthworm abundance as indicators of soil function in smallholder farming systems under a bimodal rainfall pattern in Western Kenya. The experiment involved five treatme

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15

Momo, J. A., W. M. Thagana, and Mukiri Githendu. "Effect of Withholding Irrigation Water after Complete Heading on Rice Yield and Components in Mwea-Kenya." Journal of Agricultural Sciences 4, no. 2 (2013): 69–75. http://dx.doi.org/10.1080/09766898.2013.11884703.

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16

Samejima, Hiroaki, Keisuke Katsura, Mayumi Kikuta, et al. "Analysis of rice yield response to various cropping seasons to develop optimal cropping calendars in Mwea, Kenya." Plant Production Science 23, no. 3 (2020): 297–305. http://dx.doi.org/10.1080/1343943x.2020.1727752.

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17

Winnie, Ntinyari, and Joseph P. Gweyi-Onyango. "Impact of Nitrogen Forms and Levels on Yield and Quality of Rice in Kirinyaga and Kisumu Counties Kenya." Asian Journal of Soil Science and Plant Nutrition 3, no. 4 (2018): 1–7. http://dx.doi.org/10.9734/ajsspn/2018/44658.

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18

Marwick, Trent R., Fredrick Tamooh, Bernard Ogwoka, Alberto V. Borges, François Darchambeau, and Steven Bouillon. "A comprehensive biogeochemical record and annual flux estimates for the Sabaki River (Kenya)." Biogeosciences 15, no. 6 (2018): 1683–700. http://dx.doi.org/10.5194/bg-15-1683-2018.

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Abstract. Inland waters impart considerable influence on nutrient cycling and budget estimates across local, regional and global scales, whilst anthropogenic pressures, such as rising populations and the appropriation of land and water resources, are undoubtedly modulating the flux of carbon (C), nitrogen (N) and phosphorus (P) between terrestrial biomes to inland waters, and the subsequent flux of these nutrients to the marine and atmospheric domains. Here, we present a 2-year biogeochemical record (October 2011–December 2013) at biweekly sampling resolution for the lower Sabaki River, Kenya,

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19

Njinju, Symon M., Hiroaki Samejima, Keisuke Katsura, et al. "Grain yield responses of lowland rice varieties to increased amount of nitrogen fertilizer under tropical highland conditions in central Kenya." Plant Production Science 21, no. 2 (2018): 59–70. http://dx.doi.org/10.1080/1343943x.2018.1436000.

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20

Sikuku, P., J. Kimani, J. Kamau, and S. Njinju. "Influence of Nitrogen Supply on Photosynthesis, Chlorophyll Content and Yield of Improved Rice Varieties under Upland Conditions in Western Kenya." American Journal of Experimental Agriculture 13, no. 2 (2016): 1–14. http://dx.doi.org/10.9734/ajea/2016/13859.

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21

SAMEJIMA, Hiroaki, Keisuke KATSURA, Mayumi KIKUTA, et al. "Factors Explaining Differences in Yield Response to High Nitrogen Fertilization among Rice Varieties under Tropical Highland Conditions in Central Kenya." Japan Agricultural Research Quarterly: JARQ 55, no. 3 (2021): 209–16. http://dx.doi.org/10.6090/jarq.55.209.

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22

Oyange, Wilson A., George N. Chemining’wa, James I. Kanya, and Paul N. Njiruh. "Azolla Fern in Mwea Irrigation Scheme and Its Potential Nitrogen Contribution in Paddy Rice Production." Journal of Agricultural Science 11, no. 18 (2019): 30. http://dx.doi.org/10.5539/jas.v11n18p30.

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Azolla fern is invasive in Mwea Irrigation Scheme in Kenya and its management in paddy rice fields is a challenge to farmers. A survey was undertaken to establish farmers&rsquo; knowledge and potential nitrogen contribution by Azolla in the paddies. The Scheme was stratified into seven sections and a questionnaire administered to 250 farmers. Data were collected on awareness levels, source, trend of infestation, abundance, fertilizer regimes and management practices. Five farms from each of the sections were also sampled for Azolla coverage and tissue N levels analyzed. Survey data were an

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23

Murage, Margaret W., Edward K. Muge, Betty N. Mbatia, and Mercy W. Mwaniki. "Development and Sensory Evaluation of Omega-3-Rich Nile Perch Fish Oil-Fortified Yogurt." International Journal of Food Science 2021 (February 15, 2021): 1–7. http://dx.doi.org/10.1155/2021/8838043.

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Nile perch (Lates niloticus) is a major fish species in East Africa and its processing produces sufficient amounts of by-products containing significant amounts of long-chain polyunsaturated fatty acids (PUFAs). Due to the health benefits associated with PUFAs, they can be incorporated into commonly consumed foods such as yoghurt. This study is aimed at developing an omega-3-rich functional yoghurt and evaluating its quality and acceptability. Omega-3-rich fish oils were obtained from Nile perch fat pads in the presence and absence of a commercial food grade enzyme Alcalase. Recovery of omega-

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24

Ireri, Philip, James Kung'u, and Joseph Muriithi. "Distribution of the Benefits of Ngare Ndare Forest Trust and Il Ngwesi Group Ranch Ecotourism Enterprises in Kenya." December 2020, no. 9(5) (December 31, 2020): 1178–92. http://dx.doi.org/10.46222/ajhtl.19770720-76.

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Equity in distribution of the benefits of ecotourism is critical as many African communities have remained poor though they occupy areas that are rich in tourism resources. In Kenya, some studies show tourism has been beneficial to most locals and even pro-poor while others reveal different inequalities including elite capture. In light of this divided opinion, this study investigated the distribution of benefits of Ngare Ndare Forest Trust’s and Il Ngwesi Group Ranch’s ecotourism enterprises in Kenya. The study was a cross-sectional survey that applied mixed-methods approach with quantitative

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25

Kithiia, Shadrack, and Boniface Wambua. "Temporal changes of sediment dynamics within the Nairobi River sub-basins between 1998-2006 time scale, Kenya." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 42, no. 1 (2010): 17–22. http://dx.doi.org/10.2478/v10060-008-0060-z.

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Temporal changes of sediment dynamics within the Nairobi River sub-basins between 1998-2006 time scale, Kenya The city of Nairobi is the heart of both industrial production and the economic hub in Kenya and the Eastern Africa region. The city of Nairobi and its environs are drained by three streams, namely: Nairobi, Mathare and Ngong rivers. These streams drain areas of diverse land use activities. The land use changes in a spatial manner from the rich agricultural system through residential cum urban to industrial. The significance of these various land use systems to pollutants generation, p

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Ngoc, Hoang Thi Huyen, Tran Thi Thuy Van, Nguyen Manh Ha, Nguyen Quoc Binh, and Mai Thanh Tan. "Bioclimatic assessments for tea cultivation in Western Nghe An." VIETNAM JOURNAL OF EARTH SCIENCES 41, no. 1 (2019): 81–94. http://dx.doi.org/10.15625/0866-7187/41/1/13586.

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Bioclimatology is applied for growing tea in the West of Nghe An province, where the tea is considered as a high economic efficient plant to be priorly cultivated for reducing poverty and getting rich. Based on the bioclimatic characteristics of tea plant and regional climatic data from 1980 to 2014, the bioclimatic diagrams are built and the tea cultivability is mapped in term of annual average temperature and total precipitation, for this region with regarding its district of Con Cuong as an analytical key. The climate, including both temperature and precipitation, in Con Cuong is relatively

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27

Kega, V. M., F. Olubayo, M. Kasina, and J. H. Nderitu. "Assessment of Yield Loss Caused by the African White Rice Stem Borer (Maliarpha separatella Rag (Lepidoptera: Pyralidae) at Mwea Irrigation Scheme, Kirinyaga County, Kenya." Journal of Entomology 13, no. 1-2 (2015): 19–25. http://dx.doi.org/10.3923/je.2016.19.25.

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28

Kundu, Caroline A., Masaya Ishii, Kuniaki Sato, et al. "Evaluation of Soil Chemical Properties under Paddy Production System in Central Kenya: Soil Exchangeable Cations." Journal of Agricultural Science 8, no. 8 (2016): 136. http://dx.doi.org/10.5539/jas.v8n8p136.

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<p>Lowland irrigated schemes contribute the most rice produced in Kenya. However, production is low and highly variable due to management problems. Production could be increased with appropriate soil management which requires that baseline fertility status of the soils and how they vary be known. This study examined the variability of selected soil chemical properties in the Mwea Irrigation Scheme in Central Kenya. Soil samples were collected from the top 0-15 cm depth in August 2013 and 2014 and analysed for pH, electrical conductivity (EC) and the exchangeable cations potassium (K<s

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Kundu, Caroline Agamala, Masaya Ishii, Kuniaki Sato, et al. "An Assessement of Paddy Production System in Central Kenya with Special Reference to Micronutrients." Journal of Agricultural Science 9, no. 6 (2017): 49. http://dx.doi.org/10.5539/jas.v9n6p49.

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Soil degradation reduces agricultural productivity and poses a great threat on food security status of households. In Kenya, farmers have for a long time been using only nitrogen and phosphorous based fertilizers oblivious of the soil fertility status. In most cases, there has been lack of plant response to these fertilizers, which could be due to a limitation of nutrients other than nitrogen and phosphorous. Soils are considered as variable natural bodies because of combined intrinsic and extrinsic factors of different intensities at a field or a larger region scale therefore an understanding

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30

Sterner, Thomas, Yonas Alem, Francisco Alpízar, et al. "The Environment for Development Initiative: lessons learned in research, academic capacity building and policy intervention to manage resources for sustainable growth." Environment and Development Economics 19, no. 3 (2014): 367–91. http://dx.doi.org/10.1017/s1355770x1400014x.

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AbstractThis article reviews the history of the Environment for Development (EfD) initiative, its activities in capacity building and policy-oriented research, and case studies at its centres in Chile, China, Costa Rica, Ethiopia, Kenya, South Africa and Tanzania. EfD promotes research-based policies to manage natural resources as engines of development. Since 1991, the Swedish International Development Cooperation Agency (Sida) has provided funding for students from developing countries to earn a PhD at the Environmental Economics Unit (EEU) of the University of Gothenburg. Returning home, th

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Jonkman, Nicolette Tamara Regina Johanna Maria, Esmee Daniëlle Kooijman, Karsten Kalbitz, Nicky Rosa Maria Pouw, and Boris Jansen. "Women's agricultural practices and their effects on soil nutrient content in the Nyalenda urban gardens of Kisumu, Kenya." SOIL 5, no. 2 (2019): 303–13. http://dx.doi.org/10.5194/soil-5-303-2019.

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Abstract. In Kisumu up to 60 % of the inhabitants practice some form of urban agriculture, with just under 50 % of the workers being female. On average, women spend more hours a day in the gardens than men. Therefore women's knowledge is pivotal for effective agricultural management. To enhance and better use women's knowledge, gender-related sociocultural obstacles linked to land ownership, investment, and farm inputs have to be taken into account. We aimed to determine how the agricultural knowledge and motivations of female farmers working in the Nyalenda urban gardens in Kisumu (Kenya) inf

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Chitambo, Oliver, Solveig Haukeland, Komi K. M. Fiaboe, and Florian M. W. Grundler. "African Nightshade and African Spinach Decrease Root-Knot Nematode and Potato Cyst Nematode Soil Infestation in Kenya." Plant Disease 103, no. 7 (2019): 1621–30. http://dx.doi.org/10.1094/pdis-07-18-1193-re.

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Plant-parasitic nematodes, particularly root-knot nematodes (RKN: Meloidogyne spp.) and cyst nematodes (CN: Globodera and Heterodera spp.) cause severe yield reduction in most cultivated crops and are of high economic importance. African nightshade (Solanum spp.) and African spinach (Amaranthus spp.) are important African indigenous vegetables (AIV) and are rich sources of nutrition and income. However, their host status to plant-parasitic nematodes remains largely speculative. Therefore, a survey was conducted which revealed that S. villosum exhibited high root galling, whereas on S. scabrum,

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Mango, L. M., A. M. Melesse, M. E. McClain, D. Gann, and S. G. Setegn. "Land use and climate change impacts on the hydrology of the upper Mara River Basin, Kenya: results of a modeling study to support better resource management." Hydrology and Earth System Sciences 15, no. 7 (2011): 2245–58. http://dx.doi.org/10.5194/hess-15-2245-2011.

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Abstract. Some of the most valued natural and cultural landscapes on Earth lie in river basins that are poorly gauged and have incomplete historical climate and runoff records. The Mara River Basin of East Africa is such a basin. It hosts the internationally renowned Mara-Serengeti landscape as well as a rich mixture of indigenous cultures. The Mara River is the sole source of surface water to the landscape during the dry season and periods of drought. During recent years, the flow of the Mara River has become increasingly erratic, especially in the upper reaches, and resource managers are ham

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N. Mbatha, Wathome, Nicholas K. Korir, and Joseph P. Gweyi-Onyango. "Influence of Sri Fertilizer Practice on Yield Components and Grain Yield of Hybrid Rice Varieties in Kenya." Asian Plant Research Journal, March 12, 2019, 1–7. http://dx.doi.org/10.9734/aprj/2019/v2i230043.

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Rice is one of the staple food crops in Kenya and its demand is generally increasing annually especially when maize production has declined due to various factors. The national rice consumption is estimated at 300,000 metric tonnes compared to annual production of 45,000-80,000 where the deficit is met through importation. The low production can be increased through adoption of system of rice intensification methods that can lead to higher yields and sustainable production. Several studies have been conducted on SRI water requirements, plant systems and soil but very little has been done on fe

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Mogaka, Mayaka Justus, Korir Kibet Nicholas, Wafula Wekha Nelson, and Joseph P. Onyango Gweyi. "Effect of Selected Weed Management Practices on the Growth and Yield Components of Finger Millet (Eleusine coracana) in Western Region of Kenya." Asian Plant Research Journal, September 16, 2021, 1–9. http://dx.doi.org/10.9734/aprj/2021/v8i330175.

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Finger millet (Elusine coracana) accounts for 8% of the total area and 11% of the millet production worldwide. It is grown on over 4 million ha globally, mainly for food purposes. Millions of people in the dry lands of Central and East Africa, and South of India depend on finger millet as an important source of food to them (CGIAR, 2001). Finger millet is one of the most neglected and underutilized crops. Additionally, the crop has received limited research attention compared to wheat, rice, and maize (FAO, 2011). Therefore, production challenges such as those caused by weeds like goose grass

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Akula, Leah Andisi, Esther Mwende Muindi, Lenard Gichana Mounde, and Mwamburi Mcharo. "Effect of Plant Densities on Yield Potential of Nerica 10 Rice Variety (Oryza sativa L.) In Taita Taveta County." International Journal of Plant & Soil Science, March 17, 2021, 40–46. http://dx.doi.org/10.9734/ijpss/2021/v33i130406.

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Rice (Oryza sativa L.), is an important cereal crop grown within central, western and coast region of Kenya. Despite annual rice consumption being higher than maize (Kenya’s staple food), the country is unable to meet an annual demand of 0.55 million tons and depends on imports to fill a 73% deficit. In order to contribute to reducing the deficit gap, a field experiment was conducted at Dembwa and Kipusi, Taita Taveta County in Kenya during the 2019 long rain season to find out the effect of spacing and seeding rate on performance of New Rice for Africa (Nerica) 10 rice variety. Three spacings

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Chawana, Isaac Righa, James Gacheru, Marianne Maghenda, et al. "Response of Paddy Rice (Oryza sativa L.) Morphological Characteristics to Nitrogen Fertilizers in Taveta, Kenya." International Journal of Plant & Soil Science, June 23, 2021, 42–50. http://dx.doi.org/10.9734/ijpss/2021/v33i1530510.

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This study investigated the effect of applying nitrogenous fertilizers on the morphological traits in six paddy rice varieties in Taveta, Kenya. The six paddy rice varieties, including local control, were tested during the 2018 and 2019 seasons. The experiments were laid out in a split-plot design with three replications. The main plot was the fertilizer treatment while the subplot was the varieties tested including NIBAM-11, K2-9, MWIR-2, R-1081, Silewa, and a local control Saro. The fertilizer treatments were no fertilizer, farm yard manure (FYM) alone, FYM+Urea fertilizer, and FYM+CAN ferti

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Wekesa, Simon, Anne Kelly Kambura, Marianne Maghenda, James Gacheru, John Kimani, and Mwamburi Mcharo. "Effect of Inorganic Fertilizers and Farm Yard Manure on Agronomic Characteristics of Upland Rice Straw in Taita Taveta Highlands, Kenya." International Journal of Plant & Soil Science, April 26, 2021, 28–40. http://dx.doi.org/10.9734/ijpss/2021/v33i630441.

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The study evaluated upland rice varietal agronomic characteristics and differences due to effects of fertilizer treatment and season at Taita Taveta University, Ngerenyi campus. The experiment was conducted during the short rains of 2018 and long rains of 2019. The experiment was a Randomized Complete Block Design with 3 replications. Individual plots measured 2.5 m by 2 m. Varieties evaluated were 17KH09010093B, WDR73 Hybrid, NERICA 1, NERICA 10 and Komboka. The treatments included were farm yard manure (8 tons ha-1), DAP at 75 kg ha-1, NPK (17:17:17) at 65 kg ha-1, and no fertilizer. Plant h

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Wabuyele, Emily, Simon Kang’ethe, and Leonard E. Newton. "Digital Knowledge of Kenyan Succulent Flora and Priorities for Future Inventory and Documentation." Biodiversity Informatics 11 (July 15, 2016). http://dx.doi.org/10.17161/bi.v11i0.4959.

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Biodiversity inventory in Kenya has been ongoing for about a century and a half, coinciding with the arrival of naturalists from Europe, America, and elsewhere outside Africa. Since the first collections in the mid-to-late 1800s, there has been a steady increase of plant surveys, frequency of inventory, and discovery of new species that have considerably increased knowledge of faunal and floristic elements. However, as in all other countries, such historical biological collection activities are more often than not, ad hoc, resulting in gaps in knowledge of species and their habitats. While Ken

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Peter, Echessa A. C., Nyambaka Hudson, and Changamu Evans. "An Efficacious Supplementary Fertilizer Formulation from Agricultural Farm Biomass." Chemical Science International Journal, December 14, 2019, 1–15. http://dx.doi.org/10.9734/csji/2019/v28i430145.

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Though composting is a practical method of recycling plant macronutrients in organic matter, it is impractical with biomass like sisal leaf wastes, horns, hooves and feathers that take long to decompose. This biomass is therefore ignored; causing waste disposal hitches and yet are rich in plant macronutrients (nitrogen, phosphorous, potassium and calcium). This study set out to use them to formulate a supplementary fertilizer (SF). Samples of maize cobs and stalks, sugarcane bagasse, cattle hooves/horns and sisal leaf biomass were, taken through wet digestion before laboratory analysis for lev

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Mwakilili, Aneth David, Kilaza Samson Mwaikono, Sebastian Larsson Herrera, et al. "Long-term maize-Desmodium intercropping shifts structure and composition of soil microbiome with stronger impact on fungal communities." Plant and Soil, August 14, 2021. http://dx.doi.org/10.1007/s11104-021-05082-w.

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Abstract Purpose Push–pull is an intercropping technology that is rapidly spreading among smallholder farmers in Sub-Saharan Africa. The technology intercrops cereals with Desmodium to fight off stem borers, eliminate parasitic weeds, and improve soil fertility and yields of cereals. The above-ground components of push–pull cropping have been well investigated. However, the impact of the technology on the soil microbiome and the subsequent role of the microbiome on diverse ecosystem benefits are unknown. Here we describe the soil microbiome associated with maize—Desmodium intercropping in push

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Diallo, Amadou, Sylvain Zougrana, Mahamadou Sawadogo, et al. "First report of Bacterial Leaf Streak disease of rice caused by Xanthomonas oryzae pv. oryzicola in Ivory Coast." Plant Disease, July 8, 2021. http://dx.doi.org/10.1094/pdis-04-21-0811-pdn.

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Bacterial Leaf Streak (BLS) of rice caused by Xanthomonas oryzae pv. oryzicola (Xoc) is considered as the third emerging infectious disease of rice in Africa. First reported in Africa in the 1980s, the disease is now present in at least eight African countries including Burundi, Burkina Faso, Kenya, Madagascar, Mali, Nigeria, Senegal and Uganda. Yield loss caused by BLS is estimated at 20 to 30% (Sileshi and Gebeyehu, 2021). To our knowledge BLS has so far not been reported in Ivory Coast. While BLS has not been described in the adjacent rice-growing countries Ghana and Liberia, Xoc strains is

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Mwangi, Jedidah Wangari, Oduor Richard Okoth, Muchemi Peterson Kariuki, and Ngugi Mathew Piero. "Genetic and phenotypic diversity of selected Kenyan mung bean (Vigna radiata L. Wilckzek) genotypes." Journal of Genetic Engineering and Biotechnology 19, no. 1 (2021). http://dx.doi.org/10.1186/s43141-021-00245-9.

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Abstract Background Mung bean is a pulse crop principally grown in the tropic and subtropic parts of the world for its nutrient-rich seeds. Seven mung beans accessions from Eastern Kenya were evaluated using thirteen phenotypic traits. In addition, 10 SSR markers were used to determine their genetic diversity and population structure. This aimed at enhancing germplasm utilization for subsequent mung bean breeding programs. Results Analysis of variance for most of the phenology traits showed significant variation, with the yield traits recording the highest. The first three principal components

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