Biogas slurry Nutrient Calculator
Value the N-P₂O₅-K₂O in biogas slurry (dried) (~1.5:1:1%) and the urea, DAP and MOP it replaces, with first-year nitrogen availability accounted for.
Dried biogas (gobar-gas) slurry retains most of the dung's nutrients in a more available form (≈1.5-1.0-1.0% N-P-K, ~50% first-year N) because digestion mineralises the nitrogen. Apply fresh wet slurry to standing crops, dried slurry as basal.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Organic and integrated-nutrient farmers use the free Biogas slurry Nutrient Calculator to put a rupee value on their biogas slurry (dried) and work out how much bagged fertilizer they can safely cut back.
About Biogas slurry Nutrient Calculator
Biogas (gobar-gas) digestion not only yields cooking fuel but leaves a slurry whose nitrogen is more plant-available than raw dung — about 1.5-1.0-1.0% N-P₂O₅-K₂O on a dry basis with ~50% first-year N. This tool prices the fertilizer value of your digester's slurry output.
How to use Biogas slurry Nutrient Calculator
- 1Enter your biogas slurry (dried) application rate and field area.
- 2Read the total N, P₂O₅ and K₂O supplied and the fertilizer it replaces.
- 3Cut your bagged-fertilizer plan by the equivalents shown, then follow the application note.
Why use Biogas slurry Nutrient Calculator?
- ✓Uses a realistic 1.5:1:1% N-P₂O₅-K₂O analysis for biogas slurry (dried)
- ✓Applies a 50% first-year nitrogen availability factor — organic N releases slowly
- ✓Converts the nutrients into urea, DAP and MOP equivalents and a rupee value
- ✓Free, instant and fully in-browser
Frequently asked questions
What is the nutrient value of biogas slurry (dried)?+
Biogas slurry (dried) typically analyses around 1.5% N, 1% P₂O₅ and 1% K₂O. Roughly 50% of the nitrogen is available in the first year; the rest builds soil over following seasons.
Why is only part of the nitrogen counted the first year?+
Organic nitrogen is locked in complex compounds that soil microbes mineralise gradually. About 50% becomes plant-available in year one for biogas slurry (dried); the carry-over keeps feeding later crops, which is why organic matter improves long-term fertility.
How and when should I apply it?+
Dried biogas (gobar-gas) slurry retains most of the dung's nutrients in a more available form (≈1.5-1.0-1.0% N-P-K, ~50% first-year N) because digestion mineralises the nitrogen. Apply fresh wet slurry to standing crops, dried slurry as basal.
Is this calculator free and private?+
Yes — completely free with no sign-up, and every calculation runs in your browser so nothing you enter is uploaded.
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