121 lines
3.0 KiB
JSON
121 lines
3.0 KiB
JSON
{
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"metadata": {
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"title": "Storm Lake Field Guide — Root Crops of Zone 5b",
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"author": "Barbara Cintron",
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"location": "Story County, Iowa, USA",
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"usda_zone": "5b",
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"last_frost_date": "2026-04-15",
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"first_frost_date": "2026-10-15",
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"frost_variance_days": 3,
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"version": "1.0",
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"published": "2026-07-17T05:50:00Z"
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},
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"crops": [
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{
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"id": "turnip",
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"common_name": "Winter Turnip",
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"scientific_name": "Brassica rapa var. rapa",
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"planting_windows": [
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{
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"start": "2026-08-10",
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"end": "2026-09-05"
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}
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],
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"soil_temp_range_celsius": {
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"min": 14,
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"max": 18
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},
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"root_depth_cm": {
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"min": 25,
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"max": 35
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},
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"frost_tolerance_celsius": -8,
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"days_to_harvest": {
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"min": 55,
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"max": 65
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},
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"spacing_cm": 15,
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"storage_protocol": {
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"temperature_celsius": 0,
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"humidity_percent": 95,
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"medium": "sand"
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},
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"source": "https://extension.iastate.edu/plant-health/diagnostic-services/brassica-varieties",
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"wikidata_qid": "Q905795"
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},
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{
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"id": "carrot",
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"common_name": "Heirloom Carrot",
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"scientific_name": "Daucus carota subs. sativus",
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"planting_windows": [
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{
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"start": "2026-04-15",
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"end": "2026-05-10"
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},
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{
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"start": "2026-08-01",
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"end": "2026-08-20"
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}
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],
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"soil_temp_range_celsius": {
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"min": 7,
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"max": 12
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},
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"root_depth_cm": {
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"min": 40,
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"max": 60
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},
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"frost_tolerance_celsius": -5,
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"mulch_required_cm": 30,
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"days_to_harvest": {
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"min": 70,
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"max": 90
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},
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"overwinter_viable": true,
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"harvest_window_extended": true,
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"source": "https://naldc.nal.usda.gov/catalog?page=1&q=carrot+zone+5b"
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},
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{
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"id": "parsnip",
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"common_name": "Parsnip",
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"scientific_name": "Pastinaca sativa",
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"planting_windows": [
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{
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"start": "2026-03-25",
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"end": "2026-04-10"
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}
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],
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"soil_temp_range_celsius": {
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"min": 5,
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"max": 10
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},
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"root_depth_cm": {
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"min": 50,
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"max": 75
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},
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"frost_tolerance_celsius": -15,
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"snow_cover_required": true,
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"days_to_harvest": {
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"min": 120,
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"max": 140
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},
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"minimum_frosts_before_harvest": 3,
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"earliest_harvest_date": "2026-11-01",
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"preferred_soil": "loam",
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"source": "https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1034&context=horticulturefacpub"
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}
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],
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"climate_parameters": {
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"latitude": 42.33,
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"longitude": -93.30,
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"elevation_meters": 381,
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"growing_degree_days_base_celsius": 10,
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"average_annual_precipitation_mm": 711
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},
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"cross_references": {
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"garden_ledger": "/ledger.html",
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"anchor_protocol": "/anchor.html",
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"operations_home": "/"
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}
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}
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