Question: 5 . A soil test indicates a need for 1 5 kg of sulfur per hectare. If a farmer uses ammonium sulfate as the sulfur

5. A soil test indicates a need for 15 kg of sulfur per hectare. If a farmer uses ammonium sulfate as the sulfur source, which contains 24% sulfur by mass, how much fertilizer must be applied to meet the sulfur requirement?
6. Phosphoric acid is needed for the production of 1 ton of di-ammonium phosphate (DAP). If the process has a 75% yield, how much phosphoric acid is required assuming DAP contains 46% PO by weight?

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