Now showing items 1-10 of 41
Extent and causes of low yield in maize planted late by smallholder farmers in sub-humid areas of Zimbabwe
Diagnostic work was undertaken during 1987-91 to determine the area of maize planted late by smallholder farmers in sub-humid (Natural Regions 2 and 3) communal areas of Zimbabwe, the grain yield losses encountered, and ...
Response of four maize varieties to nitrogen at Lisungwi extension planning area, Mwanza, Malawi
Lisungwi Extension Planning Area (EPA) in Mwanza Rural Development Project (RDP) has insufficient rainfall for optimum maize growth. The soils are generally low in organic matter, nitrogen, phosphorus, and magnesium. Farmers ...
On-farm experimentation with intercrops: a summary of issues from a workshop held in Malawi
Most intercropping research has been conducted on experiment stations with the aim of proving or understanding the efficiency or advantage of intercropping systems, or of designing new systems on the basis of biological ...
Productividade de trigo (Triticum aestivum (L.) thell.) com tolerância ao alumínio tóxico no solo
(Embrapa Informação Tecnológica, 1994)
Existem afirmações de que aos genes de tolerância ao alumínio (Al) deviam estar ligados genes que limitariam o potencial de rendimento do trigo. Essas afirmações eram baseadas nos resultados de programas de melhoramento ...
Improvement of durum wheat yield and associated effects on morpho-physiological characters
(African Crop Science Society, 1995)
Six durum wheat ( Triticum turgidum var. durum check for this species in other resources ) cultivars released in the central highlands of Ethiopia from 1967 to 1992, were evaluated to estimate progress in improving grain ...
Improvement in yield of bread wheat cultivars released in Ethiopia from 1949 to 1987
(African Crop Science Society, 1995)
Thirteen bread wheat ( Triticum aestivum check for this species in other resources L.) cultivars popular in the highlands of Ethiopia and representative of the period from 1949 to 1987 were studied for two cropping seasons ...
Cluster analysis, an approach to sampling variability in maize accessions
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 1996)
Cluster analysis is frequently used to classify maize (Zen mays L.) accessions and can be used by breeders and geneticists to identify subsets of accessions which have potential utility for specific breeding or genetic ...
Relative performance of testers to identify elite lines of corn (Zea mays L.)
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 1998)
Testcross evaluation is used to determine the relative potential of corn (Zea mays L.) lines in a hybrid breeding program. Choice of tester is important for efficient selection among lines for their potential in hybrids. ...
Inbred line evaluation nurseries and their role in maize breeding at CIMMYT
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 1999)
CIMMYT initiated its hybrid maize (Zea mays) research programme in 1985 in response to the growing needs of the national programmes for hybrid-oriented source germplasm. Since 1991 CIMMYT has released a total of 424 inbreds ...
Estimating the economic impact of breeding nonspecific resistance to leaf rust in modern bread wheat
(American Phytopathological Society (APS), 1998)
Breeding for resistance to rust diseases in wheat is an example of productivity maintenance research. Productivity maintenance research is necessary to avoid contractions in the wheat supply curve that result from changes ...