âEducators need the equivalent of the tractor, contour plowing, and hybridization.â âCrop rotation, contour plowing, and the careful use of fertilizers and pest controls increased productivity, but the same techniques made it easier for bigger farms to become even more productive.â
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WELCOME TO THE J.R.R. TOLKIEN ONLINE BOOK SHOP, brought to you by HarperCollins, J.R.R. Tolkien's official publisher, selling signed and deluxe editions of Tolkien's books, plus a fascinating and definitive collection of official titles written by and about one of the world's most popular and successful authors.OLKIEN ONLINE BOOK SHOP, brought to you by HarperCollins, J.R.R. Tolkien's official publisher, selling signed and deluxe editions of Tolkien's books, plus a fascinating and definitive collection of official titles written by and about one of the world's most popular and successful authors.