Nevertheless, the positive impacts of issuing LUCs dominate: At the community level, certificates have been found to be associated with higher levels in the share of total area devoted to perennial crops, and increased investment in irrigation (Deininger and Jin 2008). In one highly registered province, a household on average increased its share of cultivated land devoted to perennials, such as coffee, tea, rubber, or fruits like citrus, pineapples, bananas, and mangoes, by 5.6 percent compared with a household in a low-registration province (Do and Iyer 2008). Furthermore, a statistically significant increase in the proportion of total cultivated area devoted to perennial crops (by 7.5 percent) could be observed within a province in which everybody had a LUC, compared with a province in which no one had such a certificate. This increase comes at the expense of annual crops, with a decline of 6.5 percent in the share of total cultivated area.