Yams, an important tropical crop, provide some 18 million tons of food a year in West Africa alone. These papers treat plant improvement, agronomic studies and taxonomy, plant protection, post-harvest biology and technology, economics of production, and mechanization.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $20. ThriftBooks.com. Read more. Spend less.