Phosphate — Phosphorus Fertilizer Reference
Quick-reference skill for phosphorus nutrition, fertilizer products, and management.
When to Use
- Planning phosphorus fertilization for crops
- Interpreting soil test phosphorus levels
- Selecting phosphate fertilizer products and forms
- Managing environmental phosphorus runoff risks
- Understanding phosphorus cycling in soil
Commands
intro
scripts/script.sh intro
Overview of phosphorus in agriculture — role, cycling, global reserves.
products
scripts/script.sh products
Phosphate fertilizer products — MAP, DAP, TSP, rock phosphate, SSP.
soiltest
scripts/script.sh soiltest
Soil phosphorus testing — Bray, Olsen, Mehlich, interpretation tables.
placement
scripts/script.sh placement
Application methods — broadcast, band, starter, foliar, timing.
crops
scripts/script.sh crops
Crop phosphorus requirements and removal rates.
cycling
scripts/script.sh cycling
Phosphorus cycling — fixation, mineralization, pH effects, mycorrhizae.
environmental
scripts/script.sh environmental
Environmental management — runoff, P index, eutrophication, 4R stewardship.
checklist
scripts/script.sh checklist
Phosphorus management planning checklist.
help
scripts/script.sh help
version
scripts/script.sh version
Configuration
| Variable | Description |
|---|---|
PHOSPHATE_DIR |
Data directory (default: ~/.phosphate/) |
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