National Geographic : 1937 Dec
Photograph byFrank Ehrenford SUN-DRIED PLAINS OF NORTHERN CHILE MAKE FERTILE ACRES IN FARAWAY PLACES For decades Chilean nitrate has been mined and sold to many foreign lands as a fertilizer. Cotton planters inour Southern States formerly helped support the Chilean Government by their huge nitrate purchases. We still import shiploads, but the advent of synthetic nitrates makes us now not entirely dependent onChile. Here at Tarapaca piles of nitrate are heaped, ready for loading (page 802).