Answers are grounded in this paper and cite their sources.
(1964). Primary productivity and micro-nutrient limiting factors in some North American and New Zealand lakes. SIL Proceedings, 1922-2010: Vol. 15, No. 1, pp. 365-374.
No takes yet. Share an insight, caveat, or question.
Charles R. Goldman (1964) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: