Mónica de la Cruz Vargas-Mendoza

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The effect of tree canopy on the growth, productivity and forage quality of Megathyrsus maximus and changes in soil properties were evaluated over three seasonal periods. Four adjacent plots (15 m × 17 m each) in a tropical secondary deciduous forest having 12 years of growth and dominated by Gliricidia sepium were randomly assigned to two treatments:(More)
The State of Veracruz in Mexico is one of the main cattle producers, and uses several veterinary products for disease and parasite control. For parasite control, ivermectin is one of the most frequently used substances. Nevertheless, even though previous research conducted in other countries has found that this product has negative effects on beneficial(More)
We constructed and tested a series of regression models of intraspecific competition in Ratibida columnifera (Asteraceae), based on the growth and water use of individual plants. Models were constructed from a set of plants ("model") grown without competition under three watering regimes. Each model was then tested on another set of plants ("test") grown,(More)
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