Documents by Onwonga, R.N.

Title: Calibration and application of DSSAT Model to estimate area yield index insurance premium for common bean at different growth stages and weather perils
Author(s): Ntukamazina, N., Onwonga, R.N., Sommer, R., Mukankusi, C.M., Mburu, J., Rubyogo, J.C.
Date: 2018
Subject Category: Plant genetics and breeding, Plant physiology - Growth and development
Catalog: RUFORUM Working document series
Title: Effect of controlled release urea on soil nitrogen mineralization and maize yield in Siaya County, Kenya
Author(s): Karanja, A. N., Sommer, S., Onwonga, R.N., Mochoge, B., Shisanya, C.
Date: 2018
Subject Category: Agricultural research, Plant physiology - Growth and development, Plant physiology - Reproduction, Soil fertility
Catalog: RUFORUM Working document series
Title: Influence of Mavuno and farm yard manure fertilization on soil carbon fractions in soils of western Kenya
Author(s): Onwonga, R.N., Kamanga, S. C.
Date: 2018
Subject Category: Soil biology, Soil chemistry and physics, Soil classification and genesis, Soil cultivation, Soil erosion, conservation and reclamation, Soil fertility, Soil science and management
Catalog: RUFORUM Working document series
Title: Effectiveness of White Lupin (Lupinus albus) and Chickpea (Cicer arietinum ) in Enhancing Phosphorus Release from Rock Phosphate
Author(s): Lelei, J.J., Onwonga, R.N., Ouma, J.P.
Date: 2012
Subject Category: Soil chemistry and physics
Catalog: RUFORUM Conferences and Workshops
Title: Indigenous knowledge on the uses of African Nightshades (Solanum nigram L.) species among three Kenyan communities
Author(s): Ontita, Edward Gizemba, Onyango, C. M., Onwonga, R.N., Nyamongo, D.
Date: 2016
Subject Category: Agricultural research
Catalog: RUFORUM Journal Articles
Title: Identification of appropriate production packages for increased African nightshade production in Kisii County, Kenya
Author(s): Nyagari, E.O., Onyango, C. M., Onwonga, R.N.
Date: 2016
Subject Category: Agricultural research
Catalog: RUFORUM Working document series, RUFORUM Conferences and Workshops
Title: Influence of soil fertility management on Striga seed bank dynamics and grain yield of sorghum in semi arid areas
Author(s): Kudra, A., Chemining’wa, G., Sibuga, K.P., Onwonga, R.N.
Date: 2010
Subject Category: Agricultural research, Crop husbandry, Soil fertility, Weeds and weed control
Catalog: RUFORUM Conferences and Workshops
Title: Assessment of changes in natural resources: A participatory approach
Author(s): Baaru, M. W., Gachene, C.K.K., Onwonga, R.N., Mbuvi, J. P., Gathaara, V.
Date: 2010
Subject Category: Agricultural research, Geography, Meteorology and climatology, Nature conservation and land resources
Catalog: RUFORUM Conferences and Workshops
Title: Modelling the potential impact of climate change on sorghum and cowpea production in semi-arid areas of Kenya using the agricultural production systems simulator (APSIM)
Author(s): Onwonga, R.N., Mbuvi, J. P., Kironchi, G., Githinji, J.M.
Date: 2010
Subject Category: Agricultural research, Crop husbandry, Cropping patterns and systems, Meteorology and climatology
Catalog: RUFORUM Conferences and Workshops
Title: Modeling potential impact of climate change on sorghum and cowpea performance under different tillage and cropping systems in semi-arid areas of Kenya
Author(s): Onwonga, R.N., Kirina Kitinya, T.
Date: 2014
Subject Category: Agricultural research, Crop husbandry, Cropping patterns and systems, Meteorology and climatology
Catalog: RUFORUM Conferences and Workshops
Title: Assessment of trends in crop type and land cover change using GIS in Yatta sub-county, Kenya
Author(s): Liavoga, B. A., Kathumo, V. M., Onwonga, R.N., Karuku, G. N., Onyango, C. M., Vitale, J.
Date: 2014
Subject Category: Agricultural research, Crop husbandry, Meteorology and climatology, Plant taxonomy and geography
Catalog: RUFORUM Conferences and Workshops
Title: Influence of soil fertility management on Striga seed bank dynamics and grain yield of sorghum in semi arid areas
Author(s): Kudra, A., Chemining’wa, G., Sibuga, K.P., Onwonga, R.N.
Date: 2010
Subject Category: Agricultural research, Crop husbandry, Soil fertility, Weeds and weed control
Catalog: RUFORUM Conferences and Workshops
Title: Assessment of trends in crop type and land cover change using GIS in Yatta sub-county, Kenya
Author(s): Liavoga, B. A., Kathumo, V. M., Onwonga, R.N., Karuku, G. N., Onyango, C. M., Vitale, J.
Date: 2014
Subject Category: Agricultural research, Crop husbandry, Meteorology and climatology, Plant taxonomy and geography
Catalog: RUFORUM Conferences and Workshops
Title: Calibration and application of DSSAT Model to estimate area yield index insurance premium for common bean at different growth stages and weather perils
Author(s): Ntukamazina, N., Onwonga, R.N., Sommer, R., Mukankusi, C.M., Mburu, J., Rubyogo, J.C.
Date: 2018
Subject Category:
Catalog: RUFORUM Working document series, RUFORUM Conferences and Workshops
Title: Calibration and application of DSSAT Model to estimate area yield index insurance premium for common bean at different growth stages and weather perils
Author(s): Ntukamazina, N., Onwonga, R.N., Sommer, R., Mukankusi, C.M., Mburu, J., Rubyogo, J.C.
Date: 2018
Subject Category:
Catalog: RUFORUM Working document series, RUFORUM Conferences and Workshops
Total: 15