POTASH FROM SEAWEED
Sir, —1 know that not far from Auckland there are large beds of seaweed within easy distance from land, -where plant could be erected for drying and grinding. The seaweed is so handy that the bogey of excessive cost ot transport can be eliminated. Apparently the percentage ol potash, nitrogen, etc., does not vary much. I. am not suggesting any extracting process (let the soil do that), simply the drying and grinding. Approximately 20001b. of marketable crushed seaweed would produce 4.81b. nitrogen, J.6lh. phosphoric acid, 1'2.81b. potash, also iodine. The beds that 1 have in mind could he cut and the seaweed placed in barges, the water run off, and the seaweed towed in to the iactory to dry and urind. Apart from any possible shortage of fertilisers, I believe that the land and stock would benefit by its application. Weymouth. A. J. G. Sen mitt.
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New Zealand Herald, Volume LXXVIII, Issue 23879, 1 February 1941, Page 11
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149POTASH FROM SEAWEED New Zealand Herald, Volume LXXVIII, Issue 23879, 1 February 1941, Page 11
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