# Sovereignty Module: Dry the Harvest

## Complete Food Dehydration and Drying: From Fresh to Shelf-Stable

Drying is the oldest food preservation method. This campaign covers dehydration science, solar dryers, electric dehydrators, specific food preparation, and long-term storage.

### Chapter 1: Dehydration Science

| Factor | Detail | Why It Matters |
|---|---|---|
| Moisture content | Fresh food: 70-95% water | Bacteria need water to grow |
| Target moisture | Dried food: 5-15% water | Below this, spoilage organisms can't grow |
| Temperature | 95-160°F (varies by food) | Too low = slow/mold; too high = case hardening |
| Air flow | Constant air movement | Carries moisture away from food surface |
| Humidity | Low ambient humidity | Dry air absorbs more moisture from food |
| Surface area | Thin, uniform slices | More surface = faster drying |
| Pre-treatment | Blanching, sulfiting, acidifying | Preserves color, nutrition, prevents browning |

| Food Category | Drying Temperature | Time (dehydrator) | Final Moisture | Shelf Life |
|---|---|---|---|---|
| Fruits | 130-135°F | 8-24 hours | 15-20% (pliable) | 6-12 months |
| Vegetables | 125-135°F | 6-18 hours | 5-10% (brittle) | 6-12 months |
| Herbs | 95-105°F | 2-6 hours | 5-8% (crumbly) | 1-2 years |
| Meat (jerky) | 145-160°F | 4-12 hours | 10-15% | 1-3 months (room temp) |
| Fish | 140-150°F | 8-16 hours | 10-15% | 1-3 months |

### Chapter 2: Drying Methods

| Method | Temperature Control | Speed | Cost | Best Climate |
|---|---|---|---|---|
| Sun drying (open air) | None | Slow (2-4 days) | Free | Hot, dry, low humidity |
| Solar dehydrator | Moderate (passive) | Moderate (1-2 days) | Very low (build) | Sunny |
| Electric dehydrator | Excellent | Fast (6-24 hours) | Moderate (purchase) | Any |
| Oven drying | Good | Moderate (6-12 hours) | Low (energy cost) | Any |
| Freeze drying | Excellent | Fast | Very high (equipment) | Any |
| Smoke drying | Moderate | Moderate | Very low | Any |
| Air drying (hanging) | None | Slow (days-weeks) | Free | Low humidity |

Solar dehydrator construction: 1) Build collector box: shallow box, 2×4 ft, painted black inside. 2) Cover top with clear plastic or glass (greenhouse effect). 3) Inlet holes at bottom (cool air enters). 4) Connect collector to drying cabinet via duct. 5) Drying cabinet: tall box with screen shelves (trays). 6) Vent at top (hot, moist air exits). 7) Air flow: sun heats collector → hot air rises → passes through food trays → exits top vent. 8) No electricity needed (passive solar convection). 9) Reaches 120-160°F on sunny days. 10) Protects food from insects, rain, and animals (unlike open-air drying).

### Chapter 3: Food Preparation for Drying

| Food | Preparation | Slice Thickness | Pre-treatment | Done When |
|---|---|---|---|---|
| Apples | Peel, core, slice | 1/4 inch rings | Dip in lemon water (prevent browning) | Pliable, no moisture when squeezed |
| Tomatoes | Slice or halve | 1/4-3/8 inch | None (or blanch to remove skin) | Leathery, pliable |
| Bananas | Peel, slice | 1/4 inch rounds | Dip in lemon water | Crispy or pliable (preference) |
| Green beans | Blanch 3 min, slice | Halved lengthwise | Blanch (stops enzymes) | Brittle, snap when bent |
| Corn | Blanch 3 min, cut from cob | Kernels | Blanch | Hard, dry |
| Beef jerky | Trim fat, slice with grain | 1/4 inch strips | Marinate 4-24 hours | Bends without breaking, no moisture |
| Herbs | Wash, remove stems | Whole leaves | None | Crumble easily |
| Mushrooms | Clean, slice | 1/4 inch | None | Leathery to crispy |
| Peppers | Remove seeds, slice | 1/4 inch rings or strips | None | Brittle |
| Berries | Whole (small) or halved | Whole or halved | Check skin (prick with pin) | Leathery, no squish |

### Chapter 4: Jerky Making

| Factor | Specification | Why |
|---|---|---|
| Meat selection | Lean cuts (top round, flank, venison) | Fat goes rancid (limits shelf life) |
| Slicing | 1/4 inch, with or against grain | With grain = chewy; against = tender |
| Freezing first | Partially freeze (easier to slice thin) | Firm meat slices evenly |
| Marinade | Salt, acid, spices (4-24 hours) | Flavor and preservation |
| Temperature | 145-160°F | USDA safe temperature for meat |
| Drying time | 4-12 hours | Until bends without breaking |
| Storage | Airtight container, cool and dark | Prevents moisture reabsorption |

Basic jerky marinade: 1) 1/4 cup soy sauce. 2) 2 tablespoons Worcestershire sauce. 3) 1 tablespoon liquid smoke (optional). 4) 1 teaspoon garlic powder. 5) 1 teaspoon onion powder. 6) 1/2 teaspoon black pepper. 7) 1/2 teaspoon red pepper flakes (optional). 8) Mix marinade, add sliced meat, refrigerate 4-24 hours. 9) Pat dry, arrange on dehydrator trays (no overlap). 10) Dry at 155-160°F for 4-8 hours. 11) Done when it bends and cracks but doesn't break. 12) Store in airtight container (1-2 months at room temp, longer refrigerated).

### Chapter 5: Storage

| Storage Method | Shelf Life | Protection | Cost | Best For |
|---|---|---|---|---|
| Mason jars (sealed) | 6-12 months | Moisture, pests | Low | Small quantities |
| Vacuum sealed bags | 1-2 years | Moisture, air, pests | Moderate | Long-term storage |
| Mylar bags + O2 absorbers | 5-10+ years | Moisture, air, light, pests | Low-moderate | Very long-term |
| Zip-lock bags | 1-3 months | Minimal | Very low | Short-term |
| Paper bags | 1-4 weeks | Minimal | Very low | Herbs (air circulation) |

### Reference Card

1. Thin and uniform (slice food to even thickness for consistent drying; thick pieces stay moist while thin pieces over-dry). 2. Low humidity is essential (drying in humid conditions is slow and risks mold; use a dehydrator or wait for dry weather). 3. Blanch vegetables first (blanching stops enzymes that cause flavor and color loss during storage; skip for herbs). 4. Fat is the enemy of jerky (fat goes rancid quickly; trim all visible fat from meat before drying). 5. Check for dryness correctly (fruits should be pliable with no moisture when squeezed; vegetables should snap; jerky should bend and crack). 6. Condition after drying (place dried food in jars for 1 week, shake daily; moisture equalizes; if condensation appears, dry more). 7. Store cool, dark, and airtight (heat, light, and moisture are the enemies of dried food; vacuum sealing is ideal). 8. Drying concentrates flavor (dried food has 5-10x the flavor per weight of fresh; use sparingly in cooking until you learn the concentration).