Resumen

BARRERA, Heidy  y  LOZADA, Beatriz. Space distribution of the index of abailibity of humidity  in the state Táchira, Venezuela¹. Agronomía Trop. [online]. 2008, vol.58, n.1, pp.51-56. ISSN 0002-192X.

The abailivity of humidity in the plants presents a determinant influence in the physiological processes like the growth and development, and it is the reason for the importance of knowing the humidity conditions that presents a certain region, in order to perform agriculture planification studies, zonation, among others. Considerating this situation the objective of the study is to evaluate the space distribution of the monthly humidity abailivity index (HAI) in the Táchira state Venezuela, using 39 meteorological stations that correspond to the Ministerio del Poder Popular para el Ambiente, it was used values of the effective monthly precipitation and Potential Vapourtranspiration (PVT) to determine the HAI by means of the classification of categories propose by Hargreaves quated by Sánchez, resulting as dry months those with condition of humidity moderately deficient like January, February, March and December; and humid months those with the condition of Excessive humidity distributed at the southeast of the Andean chain of mountain chiefly from April to November.

Palabras clave : Zonation; rainfall; evapotranpitation.