Application of QSMAS principles to drought-prone areas of Nicaragua: characterization of soil chemical and physical properties under traditional and QSMAS validation plots in La Danta watershed in Somotillo - Pavon, Jellin; Amézquita Collazos, Edgar; Menocal, O.; Ayarza, Miguel Angel; Rao, Idupulapati M. (International Center for Tropical Agriculture, 2006)