Browsing by Title
Now showing items 3061-3080 of 9216
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Early genetic variation of 16 provenance of Acacia mangium in Turrialba, Costa Rica
(IUFRO, Pattaya (Tailandia), 1989) -
Echinochloa colona (L.) link en arroz de secano: longevidad de la semilla en el suelo e integración de tácticas para su combate
(CATIE, Turrialba (Costa Rica), 1996)Se evaluó la longevidad de la semilla y opciones de manejo de E. colona resistente a propanil en Parrita, Pacífico Central de Costa Rica. Para estudiar la longevidad, se colocaron semillas de E. colona en bolsas de ... -
Ecofisiología del cacao (Theobroma cacao): su manejo en el sistema agroforestal. Sugerencias para su mejoramiento en Venezuela
(CATIE, Turrialba (Costa Rica), 2008) -
ecological
(2015-11-03)Crop pest and disease incidences at plot scale vary as a result of landscape effects. Two main effects can be distinguished. First, landscape context provides habitats of variable quality for pests, pathogens, and beneficial ... -
Ecological and economic factors affecting the sustainable production of camedor palm (Chamaedorea elegans Mart) in Petén, Guatemala and Veracruz, México
(CATIE, Turrialba (Costa Rica), 2007)a mayor altura, mayor numero de hojas comerciales. El precio de mercado local de las hojas fue variable, una gruesa de 100 hojas fue pagada en US 0.48 en Guatemala y en US 0.89 en México. La presencia de plagas fue ... -
Ecological approaches to human nutrition
(2013-06-17)Malnutrition affects a large number of people throughout the developing world. Approaches to reducing malnutrition rarely focus on ecology and agriculture to simultaneously improve human nutrition and environmental ... -
Ecological approaches to human nutrition
(2015-01-22)Background. Malnutrition affects a large number of people throughout the developing world. Approaches to reducing malnutrition rarely focus on ecology and agriculture to simultaneously improve human nutrition and environmental ... -
Ecological knowledge of regeneration from seed in neotropical forest trees: implications for natural forest management
(CATIE, Turrialba (Costa Rica), 1998) -
Ecological risk assessment of current-use pesticides in the Sixaola Watershed, Costa Rica
(University of Idaho, Moscow, ID (EUA) CATIE, Turrialba (Costa Rica), 2007)Among the most important research priorities identified in tropical ecotoxicology is the need for risk assessment models specific to pesticide fate and toxicity in tropical watersheds. A number de different pesticides are ... -
Ecological structure and carbon storage in traditional silvopastoral systems in Nicaragua
(SpringerLink, 2018) -
Ecología de Dermatobia hominis L. JR. 1781 (Diptera:Cuterebridae) na regiao de Sao Carlos, Estado de Sao Paulo, Brasil
(Instituto Interamericano de Cooperación para la Agricultura (IICA), San José (Costa Rica), 1991-07)Larvas de Dermatobia hominis foram expostas, em condicoes naturais, para estudo da fase de vida livre, em caixas medindo 0.50 m x 0.20 m, suspensas a 0.70 m de altura, contendo solo, mantida com cobertura viva de grama ... -
Ecología de Formicidae en plantaciones de cacao en Barlovento, Venezuela
(CATIE, Turrialba (Costa Rica), 1986)The ant species present on 800 cacao (Theobroma cacao L.) plants, distributed in 50 different plots in Barlovento, State of Miranda were studied. Using the Pearson's multiple correlation procedure correlations between the ... -
Ecología de frutos y semillas de seis especies maderables en un bosque húmedo tropical secundario de Costa Rica y posibilidades de conversión del rodal en fuente semillera
(CATIE, Turrialba (Costa Rica), 1995)En Florencia, San Carlos, Costa Rica, se estudió un bosque secundario de 28 años de edad con el fin de determinar algunos factores que pueden afectar el establecimiento de Cordia alliodora, Goethalsia meiantha, Rollinia ... -
Ecology and behaviour of Plutella xylostella IV. Fecundity with and without host plant
(Instituto Interamericano de Cooperación para la Agricultura (IICA), San José (Costa Rica), 1991-07)Los adultos de Plutella xylostella (L.) ponen diferente número de huevos en la presencia o en la ausencia de la planta hospedadora. Se llevaron a cabo experimentos en cuartos de ambiente controlado (20°C, 16 horas luz por ... -
Ecology and management of tropical secondary forest: science, people, and policy. Proceedings
(CATIE, Turrialba (Costa Rica). IUFRO, Viena (Austria) CIFOR, Bogor (Indonesia). WWF, Gland (Suiza) GTZ, Eschborn (Alemania), 1998)Secondary forests developing on agricultural land after it is abandoned, or as the fallow period in systems of subsistence agriculture, are an increasingly important component of the forest resources of the tropics. They ... -
Ecology and silviculture of long-lived pioneer timber species in a Bolivian tropical forest
(CATIE, Turrialba (Costa Rica), 2006)En este trabajo se estudió la ecología y silvicultura de especies heliófitas maderables de larga vida en las parcelas del Proyecto de Investigación Silvicultural de Largo Plazo establecido en un bosque tropical semidecíduo ... -
Economic and environmental sustainability trade-offs in cattle farming: application to tropical Costa Rica
(Research Program on Sustainability in Agriculture-REPOSA, Guápiles (Costa Rica), Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Turrialba (Costa Rica) Agricultural University Wageningen, Wageningen (Países Bajos) Ministerio de Agricultura y Ganadería, San José (Costa Rica), 1998) -
Economic and institutional analyses of soil conservation projects in Central America and the Caribbean
(World Bank, Washington, D. C. (USA), 1994)This study is a pioneering effort in the economic analysis of returns to soil conservation projects in Honduras. As such, it attempts to generate basic information for evaluating similar projects in the future and to give ... -
Economic constraints as drivers of coffee rust epidemics in Nicaragua
(Elsevier, Ámsterdam (Países Bajos), 2020)Coffee rust (Hemileia vastatrix) epidemics of an intensity never seen before have hit Central America since 2012. This study set out to identify management and socio-economic factors that facilitate coffee rust development ...
