Ontario crop nutrient planner · OMAFRA Pub. 811
Built for Canadian farming & sustainability
CropGPT is a free, practical tool that puts trustworthy agronomy in every grower's pocket. My ambition is to help Ontario and Canadian farmers cut input waste, protect soil and water, and make confident nutrient decisions — whether you read a soil report for a living or have never filled one out.
Every recommendation here is grounded in the OMAFRA Agronomy Guide for Field Crops (Publication 811) sufficiency guidelines, with transparent math you can check. It pairs an organic pathway (compost, manure, biologicals) with a synthetic pathway so you can compare both honestly — because sustainable farming is about choice, not dogma.
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Authentic Ontario sources — regulations, soil labs, weather & advisors. Every link goes to a government or association site.