Now showing items 1-10 of 41
Increasing wheat yields sustainability through agronomic means
This paper examines common factors that constrain wheat yields: insufficient nutrients (using nitrogen as an example); problems of late planting and poor crop establishment; suboptimal water management; lodging; and weeds. ...
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 ...
Grain yield of barley as affected by cropping sequence and fertilizer application in Southeastern Ethiopia
(African Crop Science Society, 1997)
Cropping systems in the Ethiopian highlands involve rotations of cereals with grain legume and oilseed crops; the proportional allocation among crop species varies with altitude, rainfall, and soil type. Barley (Hordeum ...
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 ...
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 ...
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. ...
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 ...
Selecao para periodo de florescimento e estatura de planta e seu efeito no rendimento de graos de trigo
(Embrapa Informação Tecnológica, 1997)
Oito populações segregantes de trigo (Triticum aestivum L.) foram avaliadas quanto aos caracteres ciclo e estatura de planta em duas gerações (F3 e F4), de modo a estabelecer sua influência no rendimento de grãos. As ...
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 ...
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 ...