OBF cheat sheet

Organic farming systems rely on ecological processes, biodiversity, and nutrient cycling rather than synthetic inputs; certification requires a defined organic system plan.

The National List of Allowed and Prohibited Substances governs synthetic materials permitted in organic production and non-synthetic materials barred from use.

A crop may be labeled organic only if no prohibited substances were applied for 36 months immediately preceding harvest of that crop.

Organic livestock must have year-round outdoor access, be managed organically from the last third of gestation, and receive 100% organic feed.

Ruminant livestock must graze pasture for at least 120 days per year, with dry matter intake from pasture no less than 30% of total intake.

Nutrient management follows the cycles of nitrogen, phosphorus, and potassium; legumes fix atmospheric nitrogen through rhizobia symbiosis.

Crop rotation interrupts pest and disease cycles, distributes nutrient demand, and reduces reliance on external inputs.

Biological pest control uses predators, parasitoids, and pathogens; conservation biocontrol preserves habitat for these natural enemies.

Compare treatment options by net return per acre, not gross yield: net return = gross revenue minus variable and fixed costs attributable to the practice.

A field trial needs replication, randomization, and a control; without replication, treatment effects cannot be separated from field variability.

Compost is considered finished when it reaches a carbon-to-nitrogen ratio near 25-30:1 and internal temperatures fall after the thermophilic phase.

Cover crop termination timing affects nitrogen release: high C:N residues immobilize nitrogen, low C:N residues mineralize it quickly.

Pest economic threshold = cost of control divided by crop value per unit times the preventable loss per pest unit; treat only when pest density exceeds it.

Soil test results drive amendment rates; a soil pH below 6.0 limits phosphorus availability and can reduce legume nodulation.

Diagnose crop problems by eliminating causes in order: water, nutrients, pests, disease, and herbicide injury, using field distribution patterns as clues.

Record-keeping that links inputs, dates, and fields supports audit trails and lets producers analyze treatment outcomes over seasons.

An organic system plan documents practices, materials, monitoring, and record-keeping, and must be updated when operations change.

The certification process includes application, plan review, on-site inspection, and issuance of a certificate; annual updates are required.

Record requirements include input purchase records, field activity logs, harvest records, and sales records sufficient to verify organic integrity.

Split operations must prevent commingling and clearly separate organic from non-organic products in storage, handling, and transport.

Buffer zones or barriers protect organic fields from prohibited substances applied on adjacent land; drift risk must be documented.

Supplier verification requires current organic certificates for purchased inputs; a certificate alone does not confirm suitability of a material for a specific use.

Preventive controls and sanitation are the primary tools for managing pests and pathogens in organic handling facilities.

Continuing education and staying current with certification updates keep the professional practice aligned with changing standards.

Organic labeling categories depend on organic content: 100% organic, organic (at least 95% organic ingredients), and made with organic ingredients (at least 70%).

Products with less than 70% organic ingredients may list organic ingredients on the information panel but may not use the organic seal.

The certification agent conducts inspections and may test residues; detected prohibited substances trigger investigation and possible decertification.

Fraud prevention requires traceability from field to final sale; intentional mislabeling violates both certification rules and consumer protection law.

Conflicts of interest must be disclosed; inspectors and certifiers cannot assess operations in which they hold a financial interest.

Confidential business information gathered during certification must be protected and not disclosed without authorization.

Prohibited substance use on organic land requires a remediation plan and a defined transition period before organic status is restored.

Ethical marketing avoids unsubstantiated health claims; organic claims must reflect certified status, not aspiration.

Effective communication with certifiers uses written documentation of practices and materials, not verbal assurances.

When explaining organic rules to clients, distinguish requirements (must), allowances (may), and prohibitions (must not) explicitly.

Collaboration with neighboring farms reduces drift and commingling risk; written notification of applications supports this.

Consumer communication should state what certification verifies and avoid implying that organic products are universally safer or more nutritious.

Conflict resolution in multi-party operations starts with a shared written plan defining roles, responsibilities, and decision authority.

Technical recommendations should cite the basis, such as soil test data or trial results, so the audience can evaluate the reasoning.

Record-sharing agreements define what data is exchanged, with whom, and for what purpose, protecting confidentiality.

Feedback loops, such as farm walks and seasonal reviews, let teams adjust practices based on observed results.