Climate

Climatehttp://i1.trekearth.com/photos/112254/kenya_1_093-4.jpg

Nyeri + OthayaFrom Nyeri to Othaya = 20km (30min) and from Othaya to Nairobi = 125km (2hrs)2

http://pdf.wri.org/kenya_atlas_11_uppertana_ch8_300.pdfAltitude: 1500-2000m Annual Rainfall 1200-1600mm in 4/5 yrs (PA=1022mm)Cold to warm, wet, medium altitude regionNyeri district = 3,356sq.km land, 0km water

District of Nyerihttp://t2.gstatic.com/images?q=tbn:ANd9GcQndni_sC8BAcBMxArG_9ZtiYI6EDSs36PZdPTnIgu0pLG5JUozFAONyeriOthayaClassification: semi-humidAnnual Average Rainfall (mm): 800-1400Average Annual Potential Evaporation: 1450-2200Vegetation: Dry forest + moist woodlandPotential for Plant Growth: medium-highRisk of Failure of an Adapted Maize Crop: fairly low (5-10%)Mean annual Temp (C): 16-18Mean Max Temp: 22-24Mean Min Temp: 10-12Abs. Min Temp: 2-4Night Frost: Very Rare

Classification: sub-humidAnnual Average Rainfall (mm): 1000-1600Average Annual Potential Evaporation: 1300-2100Vegetation: moist and dry forestPotential for Plant Growth: highRisk of Failure of an Adapted Maize Crop: very low (1-5%)Mean annual Temp (C): 16-18Mean Max Temp: 22-24Mean Min Temp: 10-12Abs. Min Temp: 2-4Night Frost: Very Rare

Data from 1980 MapElevation

FAO: 1996

PrecipitationFAO:-Last updated in 2000-averaged over 37 years

NyeriOthayaNyeriOthaya2001Elevation:1500-1800m1800-2100m1961The probability of obtaining less than 20in (500mm) of rain a year0-10%0-10%The probability of obtaining less than 30in (760mm) of rain a year20-30%0-10%1961Mean Annual Rainfall760-1010mm1010-1270mmInfo from maps in PSU LibraryPrecipitation- NyeriHarvesting/Land PrepPlantingHarvesting/ Land PreparationPlanting Long Rains Short RainsJanFebMarAprMayJuneJulyAugSeptOctNovDec-1961 Map in PSU Library-average of 6 years

-1961 Map in PSU Library-average of 6 yearsmyweather2:No information provide on time period from which the data was collected

10Rainy Days

myweather2Humiditymyweather2 Temperature

FAO:-Last updated in 1991-averaged over 37 years

Temperature- Nyeri

myweather2Nyeri and Othaya (1980)Mean annual Temp (C): 16-18Mean Max Temp: 22-24Mean Min Temp: 10-12Abs. Min Temp: 2-4Night Frost: Very Rare

Wind

myweather2Length of Growing Period

FAO:-Last updated in 2000-averaged over 37 years

Kenya Soils

3 major soil ordersOxisolsUltisolsAlfisolsOxisolsStrongly weatheredLittle texture variation with depthClay sized Fe and Al oxidesVery red due the presence of Fe

Ultisolsred clay soilsHigh clay in B horizonAcidicLeached