← The evidence ledger
Evidence row 2201811
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://garden-calc.x402tookit.com/fertilizer-rate
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- dcda1c205ed5208465e5eea9755eb1f873c26b362e2b3c68684f7374df7401d9
- Leaf
- 0x50ee9791ad5004e6157ef82e2351ac56aaa550d8a68688a041b42ac56d864d82
What was observed
{
"endpoints": [
[
"x402",
"https://garden-calc.x402tookit.com/fertilizer-rate"
]
],
"name": "Garden Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Fertilizer product needed for a nutrient target per 1000 sq ft from its N-P-K analysis, with the P and K delivered and bags.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"analysis": "10-10-10",
"areaSqFt": 2500,
"bagLb": 50,
"nutrient": "n",
"targetLbPer1000SqFt": 1
},
"type": "http"
},
"output": {
"example": {
"analysis": "10-10-10",
"areaSqFt": 2500,
"asOf": "2026-10-11T20:20:02.734Z",
"bagsNeeded": 1,
"degraded": false,
"deliveredPer1000SqFt": {
"elementalKLb": 0.83,
"elementalPLb": 0.436,
"k2oLb": 1,
"nLb": 1,
"p2o5Lb": 1
},
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"your soil's actual needs: only a soil test shows what to add (phosphorus and potassium are often not needed on established lawns and gardens)",
"slow-release versus quick-release products and the maximum safe single application on the label (fast nitrogen over about 1 pound N per 1000 sq ft can burn turf)",
"…2 more"
],
"nutrient": "nitrogen",
"productKgPerHectare": 488.2,
"productLbPer1000SqFt": 10,
"productOzPer100SqFt": 16,
"reasons": [
"Product = target nutrient / (analysis % / 100). The analysis lists N, P2O5 and K2O (oxides), not elemental P and K.",
"Elemental P = P2O5 x 0.4364; elemental K = K2O x 0.8301."
],
"source": "computed locally",
"summary": "To apply 1 lb of nitrogen per 1000 sq ft with 10-10-10, spread 10 lb of product per 1000 sq ft: 25 lb (0.5 bags of 50 lb) over 2500 sq ft. That delivers 1 lb N, 1 lb P2O5 and 1 lb K2O per 1000 sq ft.",
"targetKgPerHectare": 48.8,
"targetLbPer1000SqFt": 1,
"totalDelivered": {
"k2oLb": 2.5,
"nLb": 2.5,
"p2o5Lb": 2.5
},
"totalProductKg": 11.34,
"totalProductLb": 25,
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"analysis": {
"description": "Fertilizer N-P-K analysis on the bag, for example 10-10-10 or 46-0-0 (percent N, P2O5, K2O)",
"type": "string"
},
"areaSqFt": {
"description": "Area to fertilize in square feet, 1 to 10,000,000",
"type": "number"
},
"bagLb": {
"description": "Bag size in pounds, to count bags (default 50)",
"type": "number"
},
"nutrient": {
"description": "Target nutrient: n (default), p2o5 or k2o",
"type": "string"
},
"targetLbPer1000SqFt": {
"description": "Pounds of the target nutrient wanted per 1000 sq ft, 0.05 to 10 (lawns often use 0.5 to 1 pound of N per application)",
"type": "number"
}
},
"required": [
"analysis",
"areaSqFt",
"targetLbPer1000SqFt"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"analysis": {
"type": [
"null",
"string"
]
},
"areaSqFt": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"bagsNeeded": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"deliveredPer1000SqFt": {
"properties": {
"elementalKLb": {
"type": [
"null",
"number"
]
},
"elementalPLb": {
"type": [
"null",
"number"
]
},
"k2oLb": {
"type": [
"null",
"number"
]
},
"nLb": {
"type": [
"null",
"number"
]
},
"p2o5Lb": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"nutrient": {
"type": [
"null",
"string"
]
},
"productKgPerHectare": {
"type": [
"null",
"number"
]
},
"productLbPer1000SqFt": {
"type": [
"null",
"number"
]
},
"productOzPer100SqFt": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"targetKgPerHectare": {
"type": [
"null",
"number"
]
},
"targetLbPer1000SqFt": {
"type": [
"null",
"number"
]
},
"totalDelivered": {
"properties": {
"k2oLb": {
"type": [
"null",
"number"
]
},
"nLb": {
"type": [
"null",
"number"
]
},
"p2o5Lb": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"totalProductKg": {
"type": [
"null",
"number"
]
},
"totalProductLb": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:24:51.842Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:24:51.59Z"
},
"resource": "https://garden-calc.x402tookit.com/fertilizer-rate",
"serviceName": "Garden Calculators",
"tags": [
"garden",
"fertilizer",
"npk",
"lawn",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Fertilizer product needed for a nutrient target per 1000 sq ft from its N-P-K analysis, with the P and K delivered and bags."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af