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Phosphorous balance on Costa Rican dairy farms
Balance de fósforo en fincas para la producción de leche en siete cantones de la región Huetar Norte y egión Central de Costa Rica
(2014-07-04)
The objective was to quantify P use in 11 dairy farms located in the provinces of San Jose, Cartago and Alajuela. Data such as feed purchases, milk sales, purchase and removal of animals between January and December 2010 ...
Molecular characterization using rep-PCR of native isolates of Bacillus thuringiensis, obtained from soil samples
Caracterización molecular mediante rep-PCR de aislados nativos de Bacillus thuringiensis, obtenidos de muestras de suelo
(2014-07-04)
Bacillus thuringiensis is a Gram-positive bacteria forming spores, which produces parasporal crystals of a proteic nature, toxic against various orders of insects and biodegradable and harmless to other species. This ...
Verification of dry matter content as indicator of harvest for Hass avocado fruits (Persea americana) grown in intermediate elevation production areas at Los Santos, Costa Rica
Verificación del contenido de materia seca como indicador de cosecha para aguacate (Persea americana) Cultivar Hass en zona intermedia de producción de Los Santos, Costa Rica
(2014-07-04)
The objective of this research was to study whether avocado dry matter content (DMC) could be used as an appropriate harvest index in substitution of fruit oil content (OC), for Hass avocados grown in intermediate elevation ...
Characterization of visual symptoms of nutritional deficiencies in oak seedlings
Caracterización de los síntomas visuales de deficiencias nutricionales de plántulas del roble andino en invernadero
(2014-07-04)
The identification of visual symptoms of deficien- cies is a widely used method in the diagnosis of nutritional problems in agricultural and forestry production. The aim of this study was to charac- terize visual symptoms ...
Effectiveness of formic acid and thymol in the control of Varroa destructor in africanized honey bee colonies
Efectividad del ácido fórmico y el timol en el control del ácaro Varroa destructor en colmenas de abejas africanizadas
(2014-07-04)
The effectiveness of formic acid and thymol in the control of the mite Varroa destructor was evaluated from June to October 2011 in an apiary of 16 Africanized honeybee colonies (the colonies did not receive chemical ...
Root development in F1 coffe hybrids obtained by tissue culture
Estudio del desarrollo radical en almácigo de híbridos F1 de café obtenidos por cultivo de tejidos
(2014-07-04)
F1 Hybrid seedlings, obtained by indirect somatic embryogenesis, were acclimatizated under greenhouse conditions, separated in 2 types of container: biodegradable mesh with compressed turf (Jiffy®) and the other on ...
Clay minerals identified in soils of Costa Rica from 1931 to 2014: II. Major clay types described in soils with vertic, and oxidic-kaolinic properties
Arcillas identificadas en suelos de Costa Rica a nivel generalizado durante el período 1931-2014: II. mineralogía de arcillas en suelos con características vérticas y oxídico caoliníticas
(2014-07-04)
This paper summarizes available information on soil clay mineralogy in topsoils of Costa Rica, including clay minerals described in B horizons when significantly different from predominant mineralogy in the topsoil. The ...
Analysis of the potato crop nutrient status in Costa Rica, on the basis of existing information
Análisis del estado nutrimental del cultivo de la papa en Costa Rica con base en información existente
(2014-07-04)
An analysis of the potato leaf nutrient concentration in Costa Rica was made, from the results of foliar analyses conducted during the years 2006-2012 at the Soil and Foliar Laboratory of the Agronomic Research Center, ...
Effect of sulpomag and organic complexs as partial substitutes of the culture medium used in the micropropagation of Musa sp. Cv. Cavendish
Efecto del sulpomag y complejos orgánicos como sustitutos parciales del medio de cultivo de micropropagación de Musa sp. Cv. Cavendish
(2014-07-04)
The Sulpomag natural fertilizer, or potassium sulfate and magnesium, constituted by K 2 O 22%, MgO 22%, S 18% and Cl (chloride) 2.5% plus organic complexes of coconut water 10 to 20%, and casein hydrolyzate 250 and 500 ...
Supplementation with organic selenium and its effect on productive and reproductive performance in grazing dairy cows in Costa Rica
Evaluación de la suplementación con selenio orgánico y su efecto sobre el desempeño productivo y reproductivo de vacas lecheras en pastoreo en Costa Rica
(2014-07-04)
The objective was to evaluate the effect of supplementation with selenized yeast, derived from a specific strain of Saccharomyces cerevisiae (CNCM I-3060), on productive and reproductive performance and on selenium ...