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Published guides by category
These collections are published from the guide registry and update as new guidance goes live.
Irrigation & Water Guides
How to Calculate Crop Water Requirements
Learn how to use ET₀ and crop coefficients to determine exactly how much water your crops need throughout the growing season.
Irrigation Scheduling: When and How Much to Water
Master irrigation timing using soil moisture, MAD thresholds, and crop water use to prevent both over- and under-watering.
Designing a Drip Irrigation System
Step-by-step guide to designing a drip irrigation system including emitter spacing, pipe sizing, and pump selection.
Rainwater Harvesting for Farm Irrigation
Estimate roof-water supply from measured rainfall and collection losses, compare matching demand periods, and plan storage without confusing harvested roof water with effective field rainfall.
Soil & Fertilizer Guides
Understanding NPK Fertilizer Labels
Decode fertilizer bag labels, convert between oxide and elemental forms, and calculate how much product you need for your field.
How to Correct Soil pH with Lime
Understand buffer pH methods, CCE adjustments, and how to calculate the right lime application rate for your soil.
Building Soil Organic Matter
Learn how cover crops, compost, and reduced tillage work together to build soil organic matter over time.
Soil Texture Triangle and Irrigation
Use fine-earth sand, silt and clay fractions to identify a USDA texture class, then pair that result with measured water properties for irrigation planning.
Compost Carbon and Nitrogen Balance
Correct wet ingredients to dry mass, total their carbon and nitrogen contributions, and use a compost recipe C:N result without treating it as a maturity or application-rate prediction.
Pest & Spray Guides
Understanding Spray Application Rates
Learn how to read pesticide labels, calculate dilution rates, calibrate your sprayer, and determine the right product quantity for your field.
Restricted Entry and Pre-Harvest Intervals Explained
Understand REI and PHI requirements, why they matter for worker safety and food safety, and how to track compliance.
Integrated Pest Management: When to Spray
Learn IPM principles, economic thresholds, scouting techniques, and how to make data-driven spray decisions.
Livestock & Feed Guides
Understanding Dry Matter and Feed Rations
Learn why dry matter basis matters for comparing feeds, how to read feed test results, and how to build a basic ration for your livestock.
Feed Conversion Efficiency: Measuring and Improving FCR
Understand feed conversion ratio, what affects it, how to track it, and species benchmarks for evaluating your herd performance.
Planning Hay and Water Needs for Your Herd
Estimate winter feed requirements, choose the right bale type, account for waste, and plan water supply by species and season.
Crop Planning Guides
Calculating Seed Rates and Plant Populations
Learn how thousand kernel weight, germination rates, and row spacing affect your seeding decisions and final plant stand.
Understanding Growing Degree Days for Crop Management
Learn how GDD works, base temperatures by crop, and how to use growing degree day tracking for planting and harvest decisions.
Crop Rotation Planning: Building a Healthier Rotation
Learn disease break principles, nitrogen fixation benefits, and weed suppression strategies for building a better crop rotation.
Greenhouse Guides
Greenhouse Heating Costs: How to Estimate Your Winter Energy Bill
Learn how heating degree days, cover material U-values, and fuel type determine your greenhouse seasonal heating costs.
Is a Greenhouse Worth It? Calculating ROI and Payback Period
How to calculate greenhouse return on investment, typical payback periods by greenhouse type, and what to expect from different crop strategies.
CO2 Enrichment for Greenhouses: Costs, Benefits, and Break-Even Analysis
Why plants respond to elevated CO2, which crops benefit most, equipment options, and how to calculate your break-even yield increase.
VPD Temperature and Humidity Explained
Use air and leaf temperature with relative humidity to interpret greenhouse vapor pressure deficit, verify leaf conditions, and spot a possible condensation signal.
DLI, PPFD and Lighting Hours
Measure canopy light, convert supplemental PPFD and run time into DLI, and test whether a crop-specific target fits a practical photoperiod.
Greenhouse Fertigation Stock Tank Mixing
Calculate a selected nutrient concentration through a stock injector, document source-water assumptions, and verify the real mixture against labels and calibration.
Grain & Post-Harvest Guides
Farm Economics Guides
Crop Break-Even and Cost of Production
Build a defensible one-season crop cost scenario, separate area and output costs, test yield and price sensitivity, and interpret margin without confusing it with greenhouse investment payback.
Fertilizer Cost Versus Nutrient Value
Compare fertilizer offers on a common N, P₂O₅ or K₂O mass basis while keeping oxide labels, secondary nutrients and over-application limits visible.