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Browsing Acta Agronómica by Subject "55 Ciencias de la tierra / Earth sciences and geology"
Now showing items 1-20 of 136
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A comparison of tissue preparation methods for protein extraction of cocoa (Theobroma cacao L.) pod
Cocoa, Theobroma cacao L. is one of the main tropical industrial crops. Cocoa has a very high level of interfering substances, such as polysaccharides and phenolic compounds that could prevent the isolation of suitable ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
A conceptual model to describe heat stress in dairy cows from actual to questionable loops
Thermal environment is recognized to be one the most important ecological factor to determine domestic animal growth, development and productivity for direct and indirect effects on its physiology and behavior. Despite ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Absorption curves - mineral-extraction under an aeroponic system for white chrysanthemum (Dendranthema grandiflorum (Ramat.) Kitam. cv. Atlantis White)
The aim of this study focused on the construction of the absorption and extraction curves under an aeroponic system for D. grandiflorum cv. Atlantis White, and therefore, propose the periods of maximum and minimum nutrient ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Acta Agronómica Edición Especial 58 años (1951 - 2009). Vol. 58. pp. 1-657. ISSN 0120-2812
La Revista Acta Agronómica nació en 1951 como un medio de divulgación y análisis de los resultados de las investigaciones que adelantaba en la época la Facultad de Agronomía de la Universidad Nacional de Colombia en su ...Universidad Nacional de Colombia Sede Palmira Facultad de Ciencias Agropecuarias. -
Alcohol production from sweet potato (Ipomoea batatas (L.) Lam.) genotypes in fermentative medium
Ethanol is one of the most promising fuels in Brazil, but its production is centralized in sugarcane cultivation, and is currently in search for other sources alcohol producing biomass to replace sugarcane monoculture. The ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
An ethnobotanical survey of spice, aromatic and medicinal plants used in La Molana, Atrato-Choco, Colombia: Basis for biodiversity conservation
A characterization and analysis of the production systems of aromatic, medicinal and spice plants (AMSP) was carried out in La Molana, Atrato-Chocó, Colombia throughout the identification of their biophysical, socioeconomic ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
An evaluation of physical and mechanical scarification methods on seed germination of Vachellia macracantha (Humb. and Bonpl. ex Willd.) Seigler and Ebinger
The dry Andean forests are ecosystems with a high diversity of flora and fauna and are at high risk of extinction due to the pressure of human activity. V. macracantha is a native species of the dry Andean forest, which ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Analytical methods comparison for soil organic carbon determination in Andean Forest of Sangay National Park-Ecuador
A relationship among total organic carbon content determined by ignition loss (LOI) and DUMAS combustion methods, were perfomed in evergreen Andean eyebrow forest soils, southwestern zone of Sangay National Park- Ecuador, ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Ancestral practices in potato (Solanum tuberosum L.) crop of two rural communities in the Tungurahua province of Ecuador
The aim of this research was to analyze the permanence of ancestral practices used on growing potatoes, between the years 1950 and 2016. Two rural communities (Apatug and Puñachisag) were selected in the province of ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Antagonism of Trichoderma spp. strains against pea (Pisum sativum L.) Fusarium wilt caused by Fusarium oxysporum f. sp. pisi.
The antagonistic effectiveness of native strains of Trichoderma spp. on Fusarium oxysporum f. sp. pisi. in vitro, greenhouse and field conditions, were evaluated. in vitro conditions, the antagonistic capacity of 12 strains ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Assessment of 112 tomato (Solanum lycopersicum L.) cultivars for industrial processing in Portoviejo, Ecuador
Tomato (Solanum lycopersicum L.) processing industry requires varieties with increased production and quality, and also with resistance to pest, in order for producers to cultivate these. The aim of this study was to carry ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Assessment of physical and physicochemical quality of main chocolates traded in Peru
The quality of main chocolates traded in Peru was measurement in different aspects. Physical: color (C*, H*, WI), hardness and particle size; and physico-chemical: water activity (wa), moisture, fat and ash, according to ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Asymbiotic seed germination and in vitro propagation of Cattleya trianae Linden and Reichb.f. (Orchidaceae)
Cattleya trianae (Linden and Reichb.f., 1860), Colombian national flower, is in danger of extinction due to the destruction of its natural habitats and excessive collection for horticultural purposes. Therefore, in vitro ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Biological nitrogen fixation and agronomic features of soybean (Glycine max (L.) Merr.) crop under different doses of inoculant
Soybean is one of the most important crops in the world and presents great versatility. This study aims to investigate the effect of the Bradyrhizobium japonicum inoculant at 0, 600 and 1200 mL ha-1 on soybean crop, with ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Boneless yield of carcass of feedlot-finished young Bos indicus L. bulls
The aim of this study was to evaluate the boneless yield of the carcass of 64 feedlot-finished young Nellore bulls fed diets containing coated or uncoated urea and slaughtered at five body weights (350, 455, 485, 555, and ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Cadmium voltametric quantification in table chocolate produced in Chiquinquira-Boyaca, Colombia
Bioaccumulation of heavy metals such as cadmium has been a major concern in scientific communities and international food organizations, given the great toxicological risk to the consumer, and in many places there is no ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Caracterización de aceite de semillas de maracuyá (Passiflora edulis Sims.) procedentes de residuos agroindustriales obtenido con CO2 supercrítico
En este trabajo se evaluó el proceso de extracción de aceite de semillas de maracuyá (Passiflora edulis Sims.) procedentes de residuos generados de su procesamiento agroindustrial. El aceite se obtuvo mediante la tecnología ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Changes in soil organic carbon after burning in a forest-savanna edge
Soils are one of the largest terrestrial pools of carbon, yet there is still little understanding of spatial variability for ecosystems in the tropics. Fire plays an important role in Neotropical savannas ecosystems and ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Characterization and mapping of soil classes of the Lajeado Pessegueiro watershed in Santa Catarina, Brazil
Pedological surveys and physiographic characterization of a watershed are fundamental procedures for planning the soil use. Thus, the aim of this study was to characterize and map the soil classes of the Lajeado Pessegueiro ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Characterization of lulo (Solanum quitoense Lam.) genetic diversity in the department of Boyaca, Colombia
Lulo (Solanum quitoense Lam.) is an exotic fruit with major economic importance in the Andean region. It has gained importance in the agricultural sector due to organoleptic and cultivation characteristics. There are not ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica.
