{"uid":"cap_fh_58gE9OS1KQgWflNcoE","slug":"farm-garden-calc-fertilizer-rate-calculator-cf8d4fde","name":"Farm & Garden Calc – Fertilizer Rate Calculator","description":"Fertilizer product rate and total needed to hit a target N, P2O5 or K2O rate, and all nutrients it supplies.","url":"https://agri-calc.x402tookit.com/fertilizer-rate?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["analysis","nutrient","targetRate"],"properties":{"area":{"type":"number","description":"Field size in acres (imperial) or hectares (metric), for the total product"},"units":{"type":"string","description":"imperial (default: lb, acre) or metric (kg, ha)"},"analysis":{"type":"string","description":"Product analysis N-P2O5-K2O percent, e.g. 46-0-0 or 18-46-0"},"nutrient":{"type":"string","description":"Target nutrient: n, p2o5 or k2o"},"targetRate":{"type":"number","description":"Target nutrient per area unit: lb/acre (imperial) or kg/ha (metric)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"area":{"type":["null","number"]},"asOf":{"type":["null","string"]},"units":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"nSupplied":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"targetRate":{"type":["null","number"]},"k2oSupplied":{"type":["null","number"]},"p2o5Supplied":{"type":["null","number"]},"totalProduct":{"type":["null","number"]},"targetNutrient":{"type":["null","string"]},"productRateUnit":{"type":["null","string"]},"totalProductUnit":{"type":["null","string"]},"elementalKSupplied":{"type":["null","number"]},"elementalPSupplied":{"type":["null","number"]},"productRatePerArea":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GtHojOq9vScu47bO6jrwA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates the fertilizer product application rate and total quantity needed to hit a target N, P2O5, or K2O nutrient rate, and reports all nutrients supplied by that product rate.","exampleAgentPrompt":"How much urea (46-0-0) fertilizer do I need to apply per acre and in total across my 50-acre field to hit a nitrogen target of 120 lb/acre? Use imperial units.","exampleUseCases":[{"title":"Nitrogen planning for corn field","prompt":"I want to apply enough urea (46-0-0) to hit 150 lb/acre of nitrogen on my 80-acre corn field — how much do I need per acre and how many total pounds should I order? Imperial units please."},{"title":"Phosphate rate for vegetable garden","prompt":"I'm using DAP (18-46-0) and want to hit a P2O5 target of 60 lb/acre on my 2-acre vegetable plot. What's the fertilizer rate I need per acre, and what other nutrients will that application supply?"},{"title":"Metric potassium application for canola","prompt":"Calculate how many kg/ha of 0-0-60 potash I need to apply to reach a K2O target of 80 kg/ha on 15 hectares, and tell me the total product I'll need to order in metric units."}],"resultDescription":"Returns the required fertilizer product rate per area unit (e.g. lb/acre or kg/ha), total product needed for the specified field size, and the amounts of N, P2O5, K2O, elemental P, and elemental K supplied at that rate. Also includes a text summary, units, and disclaimer.","failureModes":["Missing required query params (analysis, nutrient, targetRate) returns an error","Invalid nutrient value (not n, p2o5, or k2o) returns an error","Zero or negative targetRate may produce nonsensical results","Invalid analysis string format (not N-P2O5-K2O) may cause parsing failure","No area provided means totalProduct is null/omitted","Network or payment failure returns no data"],"whenToPreferThis":"Use this endpoint when you need to back-calculate a fertilizer product application rate from a desired nutrient delivery goal (N, P2O5, or K2O), rather than forward-calculating nutrients supplied from a known rate. Ideal for farm planning, purchasing decisions, and field-level nutrient management where the nutrient target is known but the product rate is not.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:14:27.279Z","isFirstParty":false,"canonicalSlug":"farm-garden-calc-fertilizer-rate-calculator-cf8d4fde"}