In the highlands of Turrialba Costa Rican Glen Aguilar runs a middle size dairy farm. The 20 cows are confined in a plastic covered kraal for app. 8 hrs. per day. Mechanized manure application on his pastures is practically impossible due to the steep slopes and abundant rainfall. Therefore most farmers use synthetic fertilizer and discharge their manure as waste (ending up in surface waters). Not Glen Aguilar. He invested in a small horticulture machine to mix and turn the topsoil of the kraal consisting of app. 90% manure. Fresh dung is mixed with the old dung twice per week and subsequently air dried, providing dry bedding for the cows and an easy to store and to handle organic fertilizer for his pastures, thus saving on synthetic fertilizers. Although some nitrogen may be lost in the process; drying manure is a very effective method to prevent methane emissions. Given the circumstances (steep slopes and high rainfall) the application of dry solid manure to the grassland ensures an optimal use of the valuable nutrients.