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Vol 36, No 1 (2009)

Table of Contents

Essays

Sustainable Agriculture: Unifying Concepts.
Juan Gastó, Leonardo Vera, Lorena Vieli, René Montalba
5-26

Review Articles

Controlled release formulations of herbicides based on micro-encapsulation.
Fátima Sopeña, Celia Maqueda, Esmeralda Morillo
27-42

Research Paper

Estimation of soil erosionability in the stream basin of Pillahuinco Grande, Buenos Aires province, Argentina.
Fernanda J. Gaspari, Alfonso M. Rodríguez Vagaría, Gabriela E. Senisterra
43-52
Estimation of leaf area in pecan cultivars (Carya illinoinensis).
Silvana Irene Torri, Carla Descalzi, Enrique Frusso
53-58
Power demand of flail mower during field demolition of pineapple fields.
Jorge S. Pérez de Corcho Fuentes, Francesco Garbati Pegna, Ciro Iglesias Coronel, Francisco García Reina, Paolo Spugnoli
59-68
Effect of rainfall regimes on seed production and quality of Avena barbata.
Alfredo Olivares, Myrna Johnston, Carolina Calderón
69-76
Genetic divergence of parents and F2 segregation in grain amaranths.
Ram Milan Pandey
77-84
Early individual growth of Eucryphia cordifolia and Laurelia sempervirens planted under different competition conditions in south-central Chile.
Daniel Uteau, Pablo J. Donoso
85-96
Adoption of cleaner production practices by dairy farmers in southern Chile.
Laura Nahuelhual, María A. Engler, Bernardo Carrillo
97-106

Research Notes

New raw material for activated carbon. I. Methylene blue adsorption on activated carbon prepared from Khaya senegalensis fruits.
Casmir E. Gimba, Odike Ocholi, Peter A. Egwaikhide, Turoti Muyiwa, Emmanuel E. Akporhonor
107-114
Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years.
Jorge D. Mantecón
115-122
Discrete observations of the Helix aspersa land snails spatial distribution in an outdoor system.
Olga González, Gladys Pérez Camargo, Macarena Membiela, Diana Frezza, Norberto Bartoloni, Carlos Vieites
123-130