'Nitrogen---the Miracle Worker', Colliers Weekly
Tags: 1940s; 1943; 1943-10-2; Chemistry; fertiliser; Fixation; Future; nitrates; Nitrogen; Ratcliff, J.D.
'Chemistry and the world�s food', Harpers
Tags: 1900s; 1906; 1906-4-1; Adolph Frank; Agricultural chemistry; Applied Chemistry; Calcium fertilizers; Chemistry; Duncan, Robert Kennedy; Fixation; Nitrogen; Nitrogen fertilizers; Nitrogen in agriculture
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