{"name":"fertilizer","title":"Fertilizer Calculator","category":"garden","description":"Pounds of fertilizer product to deliver a target nitrogen rate over an area, from the bag's N percentage (first N-P-K number), with a rate-options table.","price_usd":0.001,"input_schema":{"type":"object","properties":{"area_sqft":{"type":"number","description":"Area in square feet"},"n_rate_lb_per_1000":{"type":"number","description":"Target nitrogen, lb per 1,000 sq ft (default 1.0)"},"n_percent":{"type":"number","description":"Nitrogen percent in the bag, e.g. 24 for 24-0-4"}},"additionalProperties":false,"required":["area_sqft","n_percent"]}}