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The steep coffee lands must be protected from erosion if high yields are to be produced continuously, and siltation of Puerto Rico's vital reservoirs prevented. Excellent soil protection can be attained by planting the coffee trees close together in contour rows with a strip of grass between rows. Mulching under the coffee rows may further protect the soil from erosion and increase coffee yields. In Africa (Í,#,S) grass mulches generally increase and strip cultivation generally decreases coffee yields in areas with a marked dry season. In Brazil (4) well-fertilized coffee growing in full sunlight responded strongly to mulching. No information was found in the literature on the effects of plastic mulching on coffee. There is very little information available on the effects of either mulching or strip cultivation on yields of coffee in Puerto Rico. The present study was carried out to determine the effect of clean and strip cultivation, and of mulching with grass, coffee pulp, or black plastic under the coffee rows, on yields of intensively managed, heavily fertilized coffee growing in full sunlight.

the journal of agriculture of the university of puerto rico/the journal of agriculture of the university of puerto rico

Effects of Clean and Strip Cultivation, and of Mulching with Grass, Coffee Pulp, and Black Plastic, on Yields of Intensively Managed Coffee in Puerto Rico