Here the caliche was broken up into smaller pieces. According to legend, Indians discovered saltpeter and presented it to a priest. It was first used as a combustible. Then he realized saltpeter was an effective fertilizer.
Here the caliche was broken up into smaller pieces. According to legend, Indians discovered saltpeter and presented it to a priest. It was first used as a combustible. Then he realized saltpeter was an effective fertilizer.
ⓒM.Sandoval2005.04.29
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