Jul

io -

Dic

iem

bre

A

GR

ON

OM

ÍA C

OST

AR

RIC

ENSE

Vo

l. 34

N

o. 2

- 20

10

REVISTA DE CIENCIAS AGRÍCOLASUNIVERSIDAD DE COSTA RICA

COLEGIO DE INGENIEROS AGRÓNOMOSMINISTERIO DE AGRICULTURA Y GANADERÍA

Volumen 34 Julio - Diciembre 2010 Número 2

ISSN 0377-9424

129-143

145-151

153-164

165-176

177-195

197-222

223-236

237-250

251-258

259-267

269-285

287-297

www.mag.go.cr/rev a

gr/index.html

www.cia.ucr.a

c.cr

VOLUME 34 2010 NUMBER 2

Biannual journal of agricultural sciencesof the University of Costa Rica,

the Society of Ingenieros Agrónomos andthe Ministry of Agriculture

Award

Scientific papers

Aplication and comparison of univariate methods to evaluate the maize stability at Toluca-Atlacomulco Valley, Mexico.Andrés González, Delfina de Jesús Pérez, Jaime Sahagún, Omar Franco, Edgar Morales, Martín Rubí, Francisco Gutiérrez and Artemio Balbuena . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Microbiological detection of tetracyclines in 9 lots of animal feed produced in Costa Rica: Infringement of norms and incongruences with the official labeling.Karla Gutiérrez, Margarita Alfaro, Fabio Granados, Jorge Sánchez, Fernando García and César Rodríguez . . . . . . . . . . . . . . . . .

Evaluation of conventional fungicides and disease resistance inducers for the control of downy mildew (Pseudoperonospora cubensis) on melon (Cucumis melo).William Méndez, Luis Felipe Arauz and Rodrigo Ríos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soil boron extraction methods and alder response to boron additions in Andisols of Costa Rica.Manuel Segura, Álvaro Castillo and Alfredo Alvarado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soil (1): Chemical properties and classification of soils cultivated with banana in the Caribbean lowlands of Costa Rica.Fulvio Arias, Rafael Mata, Alfredo Alvarado, Edgardo Serrano and Jorge Laguna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soil (2): Soil clay mineralogy of banana-cultivated soils in the Caribbean lowlands of Costa Rica.Fulvio Arias, Rafael Mata, Alfredo Alvarado, Edgardo Serrano and Jorge Laguna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soil (3): Clay mineralogy and soil fertility of banana plantation alluvial soils at Costa Rica’s Caribbean lowlands.Fulvio Arias, Alfredo Alvarado, Rafael Mata, Edgardo Serrano and Jorge Laguna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Use of homemade microbial additive in corn silage (Zea mays). Nutritive and fermentative value.José Francisco Cubero, Augusto Rojas and Rodolfo WingChing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical notes

Comparison of snap traps of different sizes in capturing rats, Sigmodon hirsutus (Cricetidae).Javier Monge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effect of 4 doses of Indole butyric acid and types of cutting on the rooting of sacha inchi (Plukenetia volubilis L.).Henry Ruiz and Francisco Mesén . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effect of color and density of polyethylene bunch covers on the dimensions, appearance and postharvest quality of banana and plantain fruits.Alfonso Vargas, Henry Valle and Miguel González . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Evaluation of two modalities of management of the pseudostem after the harvest on the growth, production and health of banana plants (Musa AAA).Alfonso Vargas and Douglas Cubillo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .