Resultados de búsqueda - "altitud"

Integration of forage legumes into cereal cropping systems in Vertisols of the Ethiopian highlands por Tedla, A., Mamo, T., Gebeyehu, G.

“…Wheat varieties grown at the medium altitude locations in 1988 and 1989 differed significantly in grain and straw yield; there was no significant grain yield difference among varieties grown at the high altitude locations in 1988. …”
Enlace del recurso

Pattern of natural introgression in a Nothofagus hybrid zone from South American temperate forests por El Mujtar, Veronica Andrea, Sola, Georgina Giselle, Aparicio, Alejandro Gabriel, Gallo, Leonardo Ariel

“…We determined that introgressive hybridization occurs at a global rate of 7.8% and that variation was mostly explained by plots (frequency at low altitude was approximately twice that found at high altitude), while it was less influenced by subplots. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

Incidence and Occurrence of Latent Ralstonia solanacearum Infection in Seed Potato from Farmer Seed Grower Cooperatives in Southern and Central Ethiopia por Tessema, L., Seid, E., Giorgis, G.W., Sharma, K., Workie, M., Negash, K., Misganaw, A., Abebe, T.

“…The prevalence of latent infection was not significantly (P >= 0.05) influenced by potato variety or altitude at which the sample was collected but occurred randomly across altitude. …”
Enlace del recurso

A systems approach to assess crop health and maize yield lossess due to pests and diseases in Cameroon por Cardwell, K.F., Schulthess, F., Ndemah, R., Ngoko, Z.

“…Stem diameter, cob fill and weight increased with altitude reflecting the change from early maturing lowland cultivars to very late maturing mid- to high-altitude cultivars. …”
Enlace del recurso

Agronomic and ecological studies on the potato (Solanum tuberosum L.) in Southwest China : seed and crop management por He, W.

“…For spring crops, seed tubers should be older at lower altitude and younger at higher altitude than those commonly used. …”
Enlace del recurso

Survey of potato pests: diseases, nematodes, and insects in south-west Uganda. Report prepared for the International Fertilizer Development Center por Nakato, V., Mbiru, E., Were, E., Coyne, D., Beed, F., Okonya, J., Mbiri, D., Parker, M.

“…Potato virus Y (PVY) was detected from farms in Kabale and associated with an altitude gradient, with greater incidence observed at the lowest altitude range (1,700–1,900 masl). …”
Enlace del recurso

Developmental environment influences activity levels in a montane rodent, Phyllotis xanthopygus por Ruperto, Emmanuel Fabián, Taraborelli, Paula Andrea, Menéndez, Josefina, Sassi, Paola Lorena

“…In Phyllotis xanthopygus, a small altricial rodent inhabiting an altitudinal gradient in the Andes Mountains of Argentina, the behavioral response to temperature varies between populations from different altitudes. Animals from high altitude (cold environment) reduce their activity rate at high temperatures, in contrast to animals from low altitude (relatively warmer environment). …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

Evidence of genetic determination in the growth habit of Nothofagus pumilio (Poepp. & Endl.) Krasser at the extremes of an elevation gradient por Soliani, Carolina, Aparicio, Alejandro Gabriel

“…In temperate mountainous regions, altitudinal clines in tree size and growth habit develop from a gradual adjustment of multiple traits to tolerate harshening conditions with altitude. We perform a common garden trial with seedlings from two stands of Nothofagus pumilio: low altitude, tall forest (1200 m a.s.l) vs. high altitude, shrubby forest (1560 m a.s.l), to determine whether the contrasting growth habits observed in the forest have a genetic basis, which expresses in the juvenile tree life stage. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

Spatial and temporal distribution of insect vectors of Xanthomonas campestris pv. musacearum and their activity across banana cultivars grown in Rwanda. por Rutikanga, A., Night, G., Tusiime, Geoffrey, Ocimati, W., Blomme, Guy

“…Incidence of floral infections was higher in the low altitudes declining with the increase in altitude, correlating with the decline in insect activity as altitude increased. …”
Enlace del recurso

Grouping of tropical midaltitude maize inbred lines based on yield data and molecular markers por Menkir, A., Melake-Berhan, A., Ingelbrecht, I.L., Adepoju, A.

“…Thirty-eight tropical mid-altitude maize inbred lines were crossed to two inbred line testers representing the flint and dent heterotic pattern, respectively. …”
Enlace del recurso

Survey of beanfly (Ophiomyia spp) in Kabale District por Karamura, E.B.

“…meanfly (Ophiomyia spp.) incidence was investigated at the farm field level to determine losses at successive plant ages over varying altitudes in the Kabale District of Uganda. A higher beanfly population was found at the 1,860-2,110 m altitude range than at both lower and higher ranges. …”
Enlace del recurso

QTL analyses for tolerance to abiotic stresses in a common bean (Phaseolus vulgaris L.) population por Díaz, Lucy Milena, Ricaurte, Jaumer, Tovar, Eduardo, Cajiao V., César Hernando, Terán Santofimio, Henry, Grajales Bedoya, Miguel Angel, Polanía, Jose, Rao, Idupulapati M., Beebe, Stephen E., Raatz, Bodo

“…In contrast, early maturity was correlated with improved yield only in lower altitude locations, whereas in higher altitudes delayed maturity promoted yield. …”
Enlace del recurso

Infection prevalence of ovine fasciolosis in small-scale irrigation schemes along the Upper Awash River Basin por Asrat, M., Petros, B., Jobre, Y., Peden, Donald G., Shiferaw, Y., Taddesse, G., Mamo, M.

“…Statistical comparisons of results revealed that the infection prevalence in the highlands (62.9%) was significantly higher (p<0.05) than both mid-altitude (51%) and lowlands (52%). No statistically significant difference (p>0.05) was depicted between fasciolosis infection prevalence in mid-altitude and lowland study sites, as well as between age and sex categories of examined subjects. …”
Enlace del recurso

Understanding banana bunchy top disease epidemiology in Burundi for an enhanced and integrated management approach por Niyongere, C., Losenge, T., Ateka, E.M., Ntukamazina, N., Ndayiragije, P., Simbare, A., Cimpaye, P., Nintije, P., Lepoint, P.C.E., Blomme, Guy

“…These aphids were able to acquire and transmit the virus irrespective of altitude. A mean incubation period of 21 and 84 days was observed at low (780 m a.s.l.) and high (2090 m a.s.l.) altitude, respectively. …”
Enlace del recurso

A study on sheep farming practices in relation to future production strategies in Bensa district of southern Ethiopia por Kenfo, H., Mekasha, Yoseph, Tadesse, Y.

“…Agro-ecologically, the study sites were classified into highland and mid-altitude. The objective of the study was to identify sheep farming practices in relation to future production strategies in the study area. …”
Enlace del recurso

Seasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane por Ngowi, B.V., Tonnang, Henri E.Z., Khamis, F., Mwangi, E.M., Nyambo, B., Ndegwa, P.N., Subramanian, S.

“…The diversity of wild crucifer species increased with altitude but was twice as diverse in the high zone of Mt. …”
Enlace del recurso

Rice landrace diversity in Nepal. Socio-economic and ecological factors determining rice landrace diversity in three agro-ecozones of Nepal based on farm surveys por Bajracharya, J., Rana, R.B., Gauchan, D., Sthapit, B. R., Jarvis, Devra I., Witcombe, John R.

“…In Nepal, in traditional rice farming systems many diverse landraces are grown in all of the rice agro-ecosystems from low to high altitude. Three case study sites were selected to represent the major rice agro-ecozones: Bara (100–150 m) for the low-altitude terai (plain); Kaski (700–1,206 m) for the mid-hill zone; and Jumla (2,200–3,000 m) for the high-hill zone. …”
Enlace del recurso

The climate of cloud forests por Jarvis, Andy, Mulligan, M.

“…Some 85% of the sites are found at altitudes between 400 and 2800 m a.s.l., with an average altitude of 1700 m. …”
Enlace del recurso

Distribution of entomopathogenic nematodes in Southern Cameroon por Ngo Kanga, F., Waeyenberge, L., Hauser, S., Moens, M.

“…Logistic regression and redundancy analyses (RDA) revealed that soil pH, longitude, available water and altitude were associated with presence and absence of EPN. …”
Enlace del recurso

Genetic variation for total carotene, iron, and zinc contenet in maize genotypes and cassava clones por Maziya-Dixon, B.B., Kling, J.G., Menkir, A., Dixon, A.

“…A strong and positive relationship was observed between iron and zinc concentrations for both mid-altitude and lowland maize inbred lines, but this relationship was weak for the cassava clones. …”
Enlace del recurso