for examample, farmers sendd sasamples of aililing plants te instititute, wherere scientistsk for efficient such as more ecologically sound fertilizers. and the coffee that is produced is s subjected to extensive quality control. new types of plants are grown on the test fieields nearby. this new plant from brazil is showing promise. it bears an unusually large number of beans. >> these are the 3-year-old plants. this is the entire harvest. this isn't normal for one of our traditional plants. usually they need longer to produce so many coffee beans. and the leaves are bigger, nearly double the size of traditional leaves. and they are very tough. that helps deter fungus infections from developing quickly. katja: emilia acosta's job is to convince the farmers to adopt the improved ecological practices. emilia: besides using these plants, they also need to change how they cultivate them. they have to increase the distance between the plants, change the fertilizer, and provide more shade. those are big changes. most start with small steps. katja: farmers receive regular visits, this time in oro