Compost (farm compost) کمپوسٹ
Decomposed farm and household waste — variable, feedstock-dependent nutrition.
Dlaczego zakres, a nie liczba
Wide range because feedstock decides the value. TNAU reports farm compost (crop residues, weeds) averaging 0.5% N, 0.15% P2O5, 0.5% K2O, while town compost (refuse, night soil) averages 1.4% N, 1.0% P2O5, 1.4% K2O. Your compost falls somewhere on this spectrum depending on what went into the pit — a lab analysis is the only precise number.
Źródło zakresu: agritech.tnau.ac.in
What it is
Compost is rotted organic matter made from farm waste (sugarcane trash, paddy straw, weeds) or town refuse. Farm compost made from crop residues is the lowest-nutrient of the four materials listed here; town compost is richer but may carry contaminants. Both are primarily soil conditioners.
Benefits
- Recycles on-farm waste into a stable soil amendment
- Improves soil organic matter, structure and water retention
- Slow, steady nutrient release with minimal leaching risk
- Enrichable: TNAU notes adding rock phosphate (10–15 kg/t of raw material) raises its phosphorus value
Precautions
- Farm compost is the most dilute organic source here — large volumes needed for meaningful nutrition
- Town/municipal compost can contain heavy metals and glass — know your source
- Immature compost can rob nitrogen from the crop as it finishes decomposing
- Nutrient content cannot be read off a label — analyse before precision use
Application guidance
Make in trenches or pits (5–6 months to maturity for farm compost). Apply well-rotted compost before land preparation and incorporate. Rates of 5–10 t/ha are common for field crops; use higher rates mainly for soil building, not as a primary nutrient source.