{
  "metadata": {
    "title": "Hampton Field Guide — Soil Survey of the Virginia Peninsula",
    "author": "Cathy Mcmasters",
    "location": {
      "city": "Hampton",
      "state": "Virginia",
      "latitude_degrees": 37.0567,
      "longitude_degrees": -76.3767,
      "elevation_meters_amsl": 4
    },
    "survey_date": "2026-07-20",
    "version": "1.0"
  },
  "soil_taxonomy": {
    "classification": "Fine-loamy, siliceous, semiactive, thermic Typic Paleudults",
    "texture_class": "Clay Loam",
    "composition_percentages": {
      "clay_min": 24,
      "clay_max": 35,
      "sand_min": 45,
      "sand_max": 50,
      "silt_remainder": true
    },
    "ph_saturation_extract": {
      "value": 5.8,
      "uncertainty": 0.3
    },
    "cation_exchange_capacity_cmol_per_kg": {
      "min": 12,
      "max": 18
    },
    "organic_matter_percent_topsoil": 2.1,
    "drainage_class": "Moderately Well-Drained",
    "percolation_rate_mm_per_minute": 1.2
  },
  "thermal_properties": {
    "thermal_conductivity_w_per_m_K": {
      "value": 1.42,
      "condition": "15% volumetric water content",
      "source": "NASA Langley 1984"
    },
    "volumetric_heat_capacity_J_per_m3_K": {
      "value": 2300000,
      "scientific_notation": "2.3e6",
      "source": "ASTM C518"
    },
    "thermal_diffusivity_m2_per_s": {
      "value": 6.17e-7,
      "derived_from": "lambda / (rho_cp)",
      "calculation": "1.42 / 2.3e6"
    },
    "annual_surface_temperature_swing_Celsius": {
      "value": 28.4,
      "source": "NOAA NCEI normals 1991-2020"
    },
    "root_cellar_depth_solution": {
      "formula": "d = sqrt(alpha * tau / pi)",
      "tau_days": 365.25,
      "computed_depth_meters": 2.17
    }
  },
  "flora_inventory_zone_7b": [
    {
      "species": "Rosmarinus officinalis",
      "cultivar": "Prostratus",
      "trait": "drought-resistant",
      "survival_rate_percent": 85
    },
    {
      "species": "Salvia officinalis",
      "cultivar": "Purpurascens",
      "requirement": "12-hour photoperiod for essential oil synthesis"
    },
    {
      "species": "Mentha spicata",
      "cultivar": "Moroccan Mint",
      "containment_note": "invasive rhizome containment required"
    },
    {
      "species": "Origanum vulgare",
      "cultivar": "Greek Mountain Oregano",
      "edaphic_requirement": "calcicole, pH 6.2+"
    },
    {
      "species": "Foeniculum vulgare",
      "cultivar": "Florence",
      "vernalization_requirement": "72 days @ 4°C"
    }
  ],
  "seismic_baseline": {
    "regional_hazard_profile": "Low-to-Moderate (New Madrid attenuation)",
    "peak_ground_acceleration_g": 0.08,
    "probability_horizon_years": 50,
    "probability_percent": 2,
    "horizontal_displacement_angle_degrees": {
      "formula": "theta = arctan(PGA/g)",
      "value": 4.58
    },
    "effective_depth_correction": {
      "formula": "D_eff = D / cos(theta)",
      "reference": "seismic-amendment.html"
    }
  },
  "cross_references": {
    "taylor_farms_protocol": "protocol-taylor.html",
    "root_cellar_calculator": "root-cellar-calculator.html",
    "seismic_amendment": "seismic-amendment.html",
    "archive_of_clay_film": "/films/archive-of-clay/"
  }
}