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Item Effects of blended fertilizers on soil chemical properties of mature tea fields in Kenya(2018-06) Sitienei, Kibet; Kamiri, Hellen W.; Nduru, Gilbert M.; Kamau, David M.Kenya’s tea industry depends predominantly on imported NPK fertilizers to replenish nutrients removed through plucking. In this respect, two blended fertilizers containing NPKS 25:5:5:4+9Ca+2.6Mg and NPKS 23:5:5:4+10Ca+3Mg with trace elements have been produced in the country. However, contribution of the blended fertilizers to optimal tea yields had not been determined. The study aimed to evaluate the optimal levels of the two blended fertilizers on tea grown in the highlands of Kenya. The blended fertilizers were evaluated in two sites, i.e. Timbilil estate in Kericho and Kagochi farm in Nyeri. The trial was laid out in a randomized complete block design with two blended fertilizers and the standard NPK 26:5:5 as a control. The treatments were applied at four fertilizer rates (0-control, 75, 150 and 225 kg N ha-1 yr-1), with three replications. The results showed that application of 225 kg N ha-1 yr-1 blended fertilizer NPKS 25:5:5:4+9Ca+2.6Mg in Timbilil produced mean yield of 2,995 kg Mt ha-1 compared with 3,099 kg Mt ha-1 from the standard NPK. In Kagochi, the highest yield was 1,975 kg Mt ha-1 obtained from the application of the same blended fertilizer NPKS 25:5:5:4+9Ca+2.6Mg at 75 kg N ha-1 yr-1. The highest yields in both sites were obtained during a warm-dry season except in 2015–2016. This study concluded that based on the annual and seasonal yields, the two blended fertilizers and the standard type had the same effectiveness, irrespective of clones and sites. However, the fertilizer rates affected the tea yield.Item Nutrient Budget and Economic Assessment of Blended Fertilizer Use in Kenya Tea Industry(Hidawi, 2018-11-18) Sitienei, Kibet; Kamiri, Hellen W.; Nduru, Gilbert M.; Kamau, David M.Kenya’s tea industry depends predominantly on imported compound NPK fertilizers to replenish nutrients removed through plucking. These fertilizers cannot be easily manipulated for specific soils and tea clones. They also frequently become hazardous within tea-growing environments. In this respect, two fertilizer blends containing NPKS 25 : 5 : 5 : 4 + 9Ca + 2.62Mg and NPKS 23 : 5 : 5 : 4 + 10Ca + 3Mg with trace elements have been produced commercially in the country. However, the extent to which the blended fertilizers may contribute to optimal economic gains without degrading the environment has not been determined. This was the knowledge gap that this study seeks to address. The goal of this study was to evaluate the economic efficacy of fertilizer blends with the aim of identifying optimal levels of application which would maximize tea productivity with minimal negative impacts on the environment. The study hypothesized that blended fertilizers maximize productivity of tea clones with minimal environmental damage. The fertilizer blends were evaluated in two study sites, i.e., Timbilil Estate in Kericho and Kagochi farm in Nyeri. The sites were selected purposefully, one in the eastern and the other in the western tea-growing areas. The trial was laid out in randomized complete block design with two fertilizer blends and the standard NPK 26 : 5 : 5 as control. The treatments were applied at four fertilizer rates (0 (control), 75, 150, and 225 kg·N·ha−1·yr−1), replicated thrice. Leaf samples were collected and analyzed for nutrient uptake as well as associated yields and economic trends. The economic optimum nitrogen rate (EONR) was achieved at 75 kg·N·ha−1·yr−1 at Kagochi with all fertilizers, while at Timbilil, EONR was variable, between 75 and 225 kg·N·ha−1·yr−1 with fertilizer types. This study has shown that, based on the economic point of view, Blend “A” was the most efficient and consistent fertilizer in production and economic returns across the two sites.Item EFFECTS OF BLENDED FERTILIZERS ON YIELDS OF MATURE TEA CLONES TRFK 6/8 AND BBK 35 GROWN IN KENYAN HIGHLANDS(2018-08) Sitienei, Kibet; Kamiri, Hellen Wangechi Kamiri; Nduru, Gilbert M.; Kamau, DavidKenya’s tea industry depends predominantly on imported NPK fertilizers to replenish nutrients removed through plucking. In this respect, two blended fertilizers containing NPKS 25:5:5:4+9Ca+2.6Mg and NPKS 23:5:5:4+10Ca+3Mg with trace elements have been produced in the country. However, contribution of the blended fertilizers to optimal tea yields had not been determined. The study aimed to evaluate the optimal levels of the two blended fertilizers on tea grown in the highlands of Kenya. The blended fertilizers were evaluated in two sites, i.e. Timbilil estate in Kericho and Kagochi farm in Nyeri. The trial was laid out in a randomized complete block design with two blended fertilizers and the standard NPK 26:5:5 as a control. The treatments were applied at four fertilizer rates (0-control, 75, 150 and 225 kg N ha-1 yr-1), with three replications. The results showed that application of 225 kg N ha-1 yr-1 blended fertilizer NPKS 25:5:5:4+9Ca+2.6Mg in Timbilil produced mean yield of 2,995 kg Mt ha-1 compared with 3,099 kg Mt ha-1 from the standard NPK. In Kagochi, the highest yield was 1,975 kg Mt ha-1 obtained from the application of the same blended fertilizer NPKS 25:5:5:4+9Ca+2.6Mg at 75 kg N ha-1 yr-1. The highest yields in both sites were obtained during a warm-dry season except in 2015-2016. This study concluded that based on the annual and seasonal yields, the two blended fertilizers and the standard type had the same effectiveness, irrespective of clones and sites. However, the fertilizer rates affected the tea yield.Item Climate Variability and Adaptation Among Small Holder Banana Farmers in Mountain Regions of Kenya(Geography, Environment, Sustainability,, 2021-04-01) Karienye, David K.; Nduru, Gilbert M.; Kamiri, Hellen W.Banana production is the mainstay industry for majority of small holder farmers living in the mountain regions of Kenya. These regions are affected by climate-related impacts at all levels of the value chain. This paper therefore discusses climate trends, related impacts, and adaptations in banana value chain in Mt. Kenya region for the period between 1980 and 2017. The study locations were purposively selected from Mt. Kenya region to include both Imenti South and Mukurweini sub-counties. A sample of 381 respondents was selected using simple random sampling. Triangulation research design was used to guide the study by integrating both qualitative and quantitative methods in data collection and analysis. Historical document analysis was used to examine climatic data (temperature and rainfall) from the Kenya Meteorological Department, Nairobi. Results showed that rainfall and temperature have changed during the study period. Temperature trends in Mukurweini showed R2 = 0.3314 while in Imenti South R2=0.3441 with an overall annual increase in temperature in Mukurweini by 0.02°C while in Imenti South we registered an increase by 0.016°C for the study period. Mukurweini sub-county rainfall trend line had R2=-0.1064 while Imenti South sub-county had R2=-0.1014. Adverse effects of climate variability on banana value chain included low yields in both Mukurweini (79.2%) and Imenti South (60.2%) sub-counties. Farmers in the study area preferred irrigation (57.2%) followed by crop diversification (13.9%) as adaptive strategies to climate variability.Item Community Monitoring of Forest Carbon Stocks and Safeguards Tracking in Kenya: Design and Implementation Considerations(Scientific Research Publishing Inc, 2015-04) Nduru, Gilbert M.; Ucakuwun, Elias K.; Gichu, Alfred N.; Kinyanjui, James M.; Wegulo, Francis N.; McCall, Michael K.; Muchemi, Julius G.This paper investigates modalities required to design and implement community monitoring of forest carbon stock changes and safeguards implementation in Kenya. General principles and elements were drawn from the UNFCCC REDD+ policy frameworks for developing modalities and procedures for designing community forest monitoring system. The paper utilised policy analysis approach used to derive monitoring goals and objectives by assessing the compatibility of Kenya’s policy and legislative framework with monitoring elements provided in the UNFCCC REDD+ policy mechanism. The elements included monitoring goals, objectives, questions, indicators, and meth- ods and tools. Two goals were identified which included, reduction of forest carbon emissions (ER) and monitoring of multiple social and environmental safeguards (SG). Five ER related objectives were identified to include: forest reference emission levels or forest reference levels, drivers of deforestation and forest degradation, Land use activities, eligible ER actions and estimation of forest emissions. Six objectives guiding SG were identified to include: policy, governance, human rights, socio-economic, biodiversity and environmental concerns. Corresponding questions to the goals and objectives were systematically designed. In turns, indicators, depicting quantitative and qualitative measurements, which best provided answers to questions were identified. The various methods and tools used by communities around the world in providing data and information re- quired to satisfy the indictors were identified through literature review. The review identified four methods and tools that included: Remote Sensing and GIS, GPS survey, smartphone survey and Ground trothing. Smartphone and cloud-based server technology were found to be the recent emergent tools in aiding community monitoring of REDD+ projects. The paper argues that local communities and indigenous peoples have the capability and capacity to monitor and undertake forest carbon monitoring and tracking of implementation of safeguards if supported with relevant training; compensated for the time, labour and knowledge they contribute to the process; pro- vided with feedback and involved decision making process.Item Influence of Rainfall Variability on Tomato Production among Small Scale Farmers in Kieni East Sub County, Kenya(Journal of Arts & Humanities, 2018) Karienye, Joseph M.; Nduru, Gilbert M.; Huho, Julius M.; Opiyo, Francis E.In Kenya, horticultural farming within the agricultural sector contributes 25 percent to the national Gross Domestic Product and to job creation for the majority of the households. About one third of Kenya’s population live in the Arid and Semi-Arid Lands largely depends on rain-fed agriculture as a source of livelihood. The spatial and temporal rainfall variations that characterize these regions is thought have adverse effects on tomato production, with scanty information existing in literature. This study examined the influence of rainfall variability on tomato production among small scale farmers in Kieni East Sub County, Kenya. The study was conducted in four wards of Kieni East Sub County, Kabaru, Thegu River, Narumoru/ Kiamathaga and Gakawa. Cross sectional survey research design was used in this study. Household questionnaire survey and interview was used to collect primary data from a sample of 45 farmers randomly selected and proportionately distributed among the four wards. Specific objectives were to: establish rainfall characteristics between 1981 and 2014 and establish farmers’ adaptation strategies to rainfall variability on tomato production in the study area. Rainfall data was obtained from Kenya Meteorological Department in Nairobi. Data on farmer’s adapatation strategies was obtained from the farmers in Kieni East Sub County. The data collected was analyzed using descriptive statistics, frequencies, percentages, means, and tables with the aid of Statistical Package for Social Science (SPSS) version 20.0. The study benefited the Ministry of Agriculture, farmers and policy implementers in improving tomato production in areas that are characterized by varying rainfall patterns.Item Assessing Climate Variability Adaptation and Coping Strategies Among Rural Households in Kenya(Journal of Water Sciences & Environment Technologies, 2018-08) Nduru, Gilbert M.; Musyimi, Peter Kinyae; Huho, Julius M.; Opiyo, Francis E.The aim of this study is to assess the adopted water scarcity adaptation and coping strategies of rural households to climate variability. It also identifies suitable strategies that minimize the impact of climate variability on water sources in arid and semi-arid (ASALs) in Kenya. The study was carried out in Makindu Sub-county, Makueni County, Kenya. Data collection techniques such as questionnaires and in-depth interview with 370 households, key informants interviews were used to assess the adaptation and coping strategies of rural households and identify the most suitable strategies for the study area. Rainfall data was collected from Makindu Meteorological station and used for meteorological drought characteristics analysis. Standardized Precipitation Index (SPI) was used to analyze drought severity in the study area between 1980 and 2011. SPI was used to quantify precipitation deficit for various time scales. Drought Intensity (DI) was used to determine decadal drought intensities. SPI results showed that 18 years out of 31 with negative SPI values an indication of drought severity occurrence. The year 2005 was the driest in the area with an SPI of -1.76. The study also showed increasing drought intensities from 1990s to 2000s. The study showed that the rural households had adopted varied adaptation and coping strategies to cope with impact of drought extremes on water sources. However, increase in drought characteristics occurrences minimized their resilience and adaptive capacities. The study observed that the strategies employed are unlikely to enable them cope with recent climate change and variability regimes, therefore need for most suitable and viable ones. The study identified viable strategies such as rainwater harvesting and sinking boreholes as long term measures that can enhance rural households’ resilience to climate change extremes in ASALs of Kenya.