Browsing Faculty of Science & Technology (FST) by Author "Yoder, RE"
Now showing items 1-5 of 5
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An autonomous controller for site-specific management of fixed irrigation systems
Miranda, FR; Yoder, RE; Wilkerson, JB; Odhiambo, LO (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2005-09)Distributed irrigation control (DIC) for site-specific management and/or operation of fixed irrigation systems is easier to install and maintain as compared to centralized irrigation control (CIC), but requires multiple ... -
Estimation of reference crop evapotranspiration using fuzzy state models
Odhiambo, LO; Yoder, DC; Yoder, RE (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2001)Daily evapotranspiration (ET) rates are needed for irrigation scheduling. Owing to the difficulty of obtaining accurate field measurements, ET rates are commonly estimated from weather parameters. A few empirical or ... -
Evaluation Of Methods For Estimating Daily Reference Crop Evapotranspiration At A Site In The Humid Southeast United States
Yoder, RE; Odhiambo, L O; Wright, WC (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2004)Estimated daily reference crop evapotranspiration (ETo) is normally used to determine the water requirement of crops using the crop factor method. Many ETo estimation methods have been developed for different types of ... -
Optimization of fuzzy evapotranspiration model through neural training with input-output examples
Odhiambo, LO; Yoder, RE; Yoder, DC; Hines, JW (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2001)In a previous study, we demonstrated that fuzzy evapotranspiration (ET) models can achieve accurate estimation of daily ET comparable to the FAO Penman-Monteith equation, and showed the advantages of the fuzzy approach ... -
Simulation of nitrate distribution under drip irrigation using artificial neural networks
Li, Jiusheng; Yoder, RE; Odhiambo, LO; Zhang, J (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2004-04)Accurate knowledge of nitrate distribution in the soil under fertigation through drip-irrigation systems is fundamentally important for system design and management. The determination of nitrate distribution through modeling ...