The standardized precipitation index (SPI) was developed as a stationary method in which the parameters of the distribution used to estimate the cumulative probability of rainfall amounts do not vary over time. Considering that changing climatic conditions may violate the assumption of stationarity, a nonstationary version of the SPI (NSPI) has been proposed. However, since time‐varying parametric distributions tend to remove...

This paper relates the field experience of an international NGO in strengthening linkages between irrigation development and poverty reduction. Poverty Reduction through Irrigation and Smallholder Markets (PRISM) is introduced as a methodology for combining small‐plot irrigation technology with complementary inputs and services to enhance small farmers' ability to participate effectively in markets for high‐value agricultural...