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Mostrando ítems 11-20 de 42
Article
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 ...
Article
Agro-ecological decision support systems for wheat improvement in Ethiopia: Climatic characterisation and clustering of wheat growing regions
(African Crop Science Society, 1999)
Wheat production environments in Ethiopia are highly heterogeneous with respect to natural resource characteristics, cropping systems, biotic and abiotic constraints. This paper analyses the agro-climatic resources of 20 ...
Article
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages
(African Crop Science Society, 1998)
Two widely-used open pollinated maize (Zea mays L.) cultivars from East Africa, Katumani and Kito composites, developed and improved for early maturity, grain yield and drought escape were evaluated for drought tolerance ...
Article
Tecnologias para conservacion y productividad: Sustitutas o complementarias
(Universidad de Costa Rica, 1996)
Tecnologías para conservación y productividad: sustitutas o complementarias. El aumento de la productividad y la conservación de los recursos se anuncian como objetivos deseables de la investigación agrícola pero frecuentemente ...
Article
Pathogenicity variations of Puccinia recondita f. sp. tritici and P. graminis f. sp. tritici in wheat growing areas of Mexico during 1988 and 1989
(American Phytopathological Society (APS), 1991)
A survey of Puccinia recondita f. sp. tritici in Mexico during 1988 and 1989 indicated the presence of 23 pathotypes. In the Pacific region and Highland Plateau, pathotype TCB/TD predominated both years, followed by TBD/TM. ...
Article
Comparison of methods for inoculation of ears and stalks of maize with Fusarium moniliforme
(American Phytopathological Society (APS), 1990)
Over four plantings from 1986 to 1988, several ear- and stalk-inoculation methods for Fusarium moniliforme were compared on maize (Zea mays). Significant differences were observed among methods in their effect on disease ...
Article
The effects of several crop management systems on bread wheat yields in the Ethiopian Highlands
(African Crop Science Society, 1997)
Crop management (CM) research conducted in Ethiopia has tended to quantify yield gains and losses associated with single management factors, making it difficult to determine the relative importance of main effects and ...
Article
Grass weed competition with bread wheat in Ethiopia. 1. Effects on selected crop and weed vegetative parameters and yield components
(African Crop Science Society, 1996)
Competition effects of four of the predominant grass weed species in Ethiopia (Avena abyssinica Hoechst, Lolium temulentum L., Snowdenia polystachya Fresen (Pilg), and Phalaris paradoxa L.) on the morphological characters, ...
Article
Potential for cereal-based double cropping in Bale Region of Southeastern Ethiopia
(African Crop Science Society, 1994)
A double cropping trial was conducted under bimodal rainfall conditions for two years at the Sinana Research Centre in southeastern Ethiopia. Compared to the traditional farmers’ practice of fallowing land during one of ...
Article
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 ...