Please use this identifier to cite or link to this item:
http://ir.mu.ac.ke:8080/jspui/handle/123456789/8038
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Mugalavai, Edward M | - |
dc.contributor.author | Omuterema, Stanley O | - |
dc.contributor.author | Manchiraju, S. Rao | - |
dc.contributor.author | Kipkorir, Emmanuel C. | - |
dc.date.accessioned | 2023-09-11T06:50:55Z | - |
dc.date.available | 2023-09-11T06:50:55Z | - |
dc.date.issued | 2008-07 | - |
dc.identifier.uri | http://ir.mu.ac.ke:8080/jspui/handle/123456789/8038 | - |
dc.description.abstract | This paper presents evaluation of criteria to be used in advising farmers on the planting dates in Lake Victoria Basin. The criteria were evaluated using relative yield over a 30 days period following sowing computed by means of soil water balance technique. Crop failure or a false start to the season is indicated by a relative yield rate of less than 35%. Due to the high ratio of computed relative yields in the region, the threshold values were varied from 35% to 75% in order to capture the failure rates. Using this method, onset dates were determined for 26 stations spatially distributed in the basin. Daily rainfall and mean daily evaporation data for a period of 20-30 years starting from 1970 were used. The criteria for accumulated rainfall depth over a specified period were evaluated. The tested criteria using RAIN software included; the accumulation of 20 mm of rainfall in 3 days, accumulation of 40 mm in 4 days and accumulation of 60 mm in 6 days. Comparison made between the accumulated depth criteria and those based on root zone depletion equal to readily available water (RAW) in 4 days and the soil moisture content at field capacity (SMC) in 4 days showed that the accumulation of 40mm in 4 days criterion compared well with (RAW) criterion but the SMC criterion gave delayed onsets in most cases. Results reveal that the accumulated depth criterion of 40mm in 4 days can be used as an operational criterion | en_US |
dc.language.iso | es | en_US |
dc.publisher | CDMHA, Masinde-Muliro University of Science & Technolology | en_US |
dc.subject | onset | en_US |
dc.subject | rainy season | en_US |
dc.subject | evaluatio | en_US |
dc.subject | Lake Victoria Basin | en_US |
dc.title | Evaluation of criteria for use in determining growing season Onset dates in the Kenyan Lake victoria Basin | en_US |
dc.type | Article | en_US |
Appears in Collections: | School of Engineering |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Evaluationpaper-F.pdf | 455.08 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.