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Soil erosion effects on productivity of a humic nitisol
Gachene, C.K.K.(University of Nairobi, Department of Soil Science, Nairobi, Kenya); Jarvis, N.(Swedish University of Agricultural Sciences, Department of soil sciences, Sweden); Linner, H.(Swedish University of Agricultural Sciences, Department of soil sciences, Sweden); Mbuvi, J.P.(University of Nairobi, Department of Soil Science, Nairobi, Kenya)

ConferenceProccedings of the 15th annual general meeting sportman's arms hotel, Nanyuki, Kenya, 15, Nanyuki, Kenya, Aug 19th-23rd
Publisher Soil Science Society of East Africa (SSSEA), Nairobi (Kenya)
Date of publication2000
AGRIS CategoriesSoil science and management
AGROVOC English termsProductivity; Erosion; Soil fertility; Soil stabilization; Kenya
AGROVOC French termsProductivite; Erosion; Fertilite du sol; Stabilisation du sol; Kenya
AGROVOC Spanish termsProductividad; Erosion; Fertilidad del suelo; Estabilizacion del suelo; Kenia
LanguageEnglish
TypeBibliography
Paginationp.233
SourceSoil technologies for sustainability smallholder farming systems in East Africa.- Nairobi (Kenya): Soil Science Society of East Africa (SSSEA), 2000. Proccedings of the 15th annual general meeting sportman's arms hotel, Nanyuki, Kenya,Proccedings of the 15th annual general meeting sportman's arms hotel, Nanyuki, Kenya, 15, Nanyuki, Kenya, Aug 19th-23rd.- 9966-879-27-7.- p.233
Abstract (English)This study was carried out with the aim of assessing the effect of accelerated erosion on soil productivity of a humic nitisol at Kabete, Kenya. Twenty runoff plots which had been subjected to varying levels of ero¬sion for four seasons (from 1991 to 1992) were planted with maize during the 1993 long-rains. Ten of the plots were cropped with maize under fertilized conditions while the rest were cropped with maize under non-fertilized conditions. There was very little change in soil physi¬cal properties following erosion. However, there was a decrease in percentage volu¬metric water content after four seasons at pressure heads between - 100cm to - 1500 em. Differences in %C, %N and available P between the least and most eroded plots were significant at the 0.01 probability level. Maize grain and above-ground dry matter yields and crop height were always greater in the least eroded plots compared to the more eroded plots in both fertilized and non-fertilized crops. These crop para¬meters were highly and negatively correlat¬ed with cumulative soil loss. Relative to the least eroded plot, there was a decline in maize grain yields of 214 kg ha-l cm-l of topsoil lost. Plant height was reduced 34cm per cm of soil lost for the first 2.5cm of topsoil.

Source:

Kenya Agricultural Research Institute (Kenya) KARI
P.O Box 14733-00800
Nairobi
Contact: Peninah W. MWANGI
Tel: +254 020 4183720; 4183301-20; 4444144-137
Fax: +254 20 4443926
Email: cdnarl@iconnect.co.ke; cdnarl@iconnect.co.ke;
URL: http://www.kari.org/
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