Datasets

CIMMYT Ethiopia

TAMASA Nigeria. Variety calibration trials, dry and rainy season, 2016

This dataset contains information from variety calibration trials in four locations (BUK, Dambatta, Samaru and Lere). The data was collected from two separate sets of experiments. Experiment 1 was under full irrigation conducted from 23rd March to 20th June 2016 across the four locations. Experiment 2 was conducted in the rainy season with supplementary irrigation from 23rd June to 10th November 2016. The data presented here is for the dry season trials. Details can be requested.

• agricultural-sciences
• dataset
• maize
• varieties

CIMMYT Ethiopia

TAMASA Nigeria. Variety validation trials dataset for Northern Guinea Savanna, Nigeria. 2016.

This dataset contains information from on-farm validation trials conducted across 30 farmer fields in Local government areas of the northern guinea savanna AEZ in Kano. In each farmer field 10 plots (30 meter square each) were planted with a different combination of early maturing maize (10 varieties) under 3 different sowing densities. Each plot is a different combination of variety and sowing data. Data was collected on tops weight at anthesis, cob yield and stover yield.

• agricultural-sciences
• dataset

CIMMYT Ethiopia

TAMASA Nigeria. Variety validation trials in Sudan Savanna, 2015

This dataset contains information from on-farm validation trials conducted across 30 farmer fields in Local government areas of the sudan savanna AEZ in Kano. In each farmer field 10 plots (30 meter square each) were planted with a different combination of early maturing maize (10 varieties) under 3 different sowing densitie. Each plot is a different combination of variety and sowing data. Data was collected on tops weight at anthesis, cob yield and stover yield.

• agricultural-sciences
• agronomy

CIMMYT Ethiopia

Varietal turn-over and their effect on yield and food security – evidence from 20 years of household surveys in Kenya

The International Maize and Wheat Improvement Centre (CIMMYT), in collaboration with the Kenya Agriculture and Livestock Research Organization (KALRO) (previously the Kenya Agricultural Research Institute or KARI), conducted four nationally representative household surveys in the major maize growing areas during the last 30 years. All surveys used the same two-stage stratified design with maize production zones or agroecological zones (AEZs) as strata, census clusters or sublocations as primary sampling units, and maize-growing households as secondary sampling units. The first survey was conducted in 1992 and covered 79 clusters totaling 1397 farmers. This survey also defined the six AEZs, going from East to West, as the Coastal Lowlands, the Dry Mid-Altitude zone, the Dry Transitional zone, the Moist Transitional zone, the High Tropics, and the Moist-Mid Altitude zone. The second survey, conducted in 2002, covered 185 sublocations based on the 1999 census, with 1652 households. The third survey, of 2010, covered 120 sublocations with 1341 households while the fourth survey, of 2012, interviewed the same farmers with a replacement of 20% of randomly sampled households.