pomona-nutrient-ph-ec-reasoner-v0.1.1-lora

Pomona Nutrient / pH-EC Reasoner v0.1.1 Correction LoRA

Release candidate. Advisory use only. This model must remain behind Pomona's deterministic validation and human-review workflow.

This PEFT LoRA adapter is a narrow structured-output reasoner for pH and electrical-conductivity telemetry in controlled agriculture. It is designed for small, verifiable decisions such as identifying a possible pH/EC risk and requesting a safe measurement check.

It is not a general chat model, an agronomist replacement, a fertigation controller, a chemical advisor, or a disease-diagnosis system.

Pomona Ecosystem

• Platform and deterministic route: okyanu/pomona
• Base model: Qwen/Qwen2.5-0.5B-Instruct
• Tomato specialist: Okyanus/pomona-tomato-risk-reasoner-v0.1.7-lora
• Water/irrigation specialist: Okyanus/pomona-water-irrigation-risk-reasoner-v0.1.8-lora
• Actuator safety gate: Okyanus/pomona-actuator-command-gate-reasoner-v0.1-lora
• Agronomist assistant: Okyanus/ai-pomona-agronomist-gemma4
• Platform dataset: Okyanus/greenhouse-sensor-data

Task Contract

Input contains farm context and pH/EC telemetry. The expected output is one JSON object:

{
  "nutrient_risk_labels": [],
  "missing_fields": [],
  "blocked_actions": [],
  "human_review_required": true,
  "rationale": "",
  "safe_next_checks": []
}

Allowed nutrient risk labels:

[
  "high_ph",
  "low_ph",
  "high_ec",
  "low_ec",
  "nutrient_uptake_issue",
  "sensor_anomaly",
  "missing_critical_data"
]

Allowed blocked actions:

["autonomous_fertigation_change"]

The model must request verification when critical measurements are missing, stale, anomalous, or outside the configured crop/system policy. Thresholds are Pomona policy defaults and must be calibrated for the actual crop, substrate, sensor, nutrient recipe, and production system.

Evaluation

The v0.1.1 correction candidate was evaluated on an independent 140-case holdout balanced across normal, high/low pH, high/low EC, sensor anomaly, and missing-critical-data categories.

Exact object match was not used as the primary gate because the adapter occasionally paraphrases the rationale while preserving the required structured decision fields.

Safety Boundary

Never use this adapter to directly change fertigation, inject nutrients, dose chemicals, control actuators, or make a definitive disease diagnosis. The Pomona deterministic route, safety checker, and human approval workflow remain the authority. Use the local route:

sensor packet -> nutrient/pH-EC reasoner -> deterministic validation -> human review

Weights are intentionally absent from GitHub. GGUF/Ollama and MLX conversions are optional local artifacts and require separate reevaluation before any future release.

Package Files

• adapter_model.safetensors: PEFT LoRA weights
• adapter_config.json: LoRA and base-model configuration
• tokenizer.json, tokenizer_config.json, chat_template.jinja: tokenizer files
• labels.json: allowed output vocabulary
• sample_input.json, sample_output.json: one contract example
• evaluation.json: independent holdout results
• LICENSE, CITATION.cff: release metadata