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Fertigation on Organic Farms: Delivering Bio-Inputs Through Drip
Fertigation through drip is the most labour-efficient way to deliver Jeevamrutha and other liquid organic inputs to your crops. Hand-application of Jeevamrutha to 30 raised beds at 10 litres per bed takes 3–4 hours every 15 days. Delivered through the drip system with a venturi injector, it takes 20 minutes of setup and monitoring. Over a full growing season, drip fertigation saves 15–20 hours of labour per month — and delivers the input more uniformly, with every plant receiving an equal dose at the root zone. The key rules: filter the input thoroughly before injection, flush pipes after injection, and never fertigate with inputs that contain large particles.
Venturi injector
Most practical fertigation device for small farms — no moving parts, ₹800–2,000, works off flow pressure
Filter first
Always filter Jeevamrutha through fine cloth before injecting — particles block emitters quickly
1–2%
Jeevamrutha concentration for fertigation — 1 litre per 50–100 litres of irrigation water
Flush after
Always flush the system with clean water for 10 minutes after fertigation to clear bio-input residues
Which Bio-Inputs Can Be Delivered Through Drip Fertigation?
| Bio-Input | Safe to Fertigate? | Preparation Before Injection | Dilution Rate |
|---|---|---|---|
| Jeevamrutha (fermented) | Yes — highly recommended | Strain through 3–4 layers of muslin cloth to remove particles; allow sediment to settle, use supernatant | 1:50 to 1:100 (1 litre per 50–100 litres irrigation water) |
| Panchagavya (fermented) | Yes — with good filtration | Strain thoroughly; Panchagavya has banana and coconut solids that block emitters if not filtered | 1:100 (1 litre per 100 litres water) |
| Liquid vermicompost leachate | Yes | Filter through fine mesh; use the clear liquid only | 1:20 to 1:50 |
| Seaweed extract (commercial liquid) | Yes — excellent | Usually pre-filtered; check label for compatibility | Per manufacturer recommendation |
| Fish amino acid / Fish emulsion | Yes — dilute well | Dilute before injection; strong odour but excellent nutrient profile | 1:200 to 1:500 |
| Dashparni Ark (10-leaf extract) | With caution — test on small area first | Fine-filter; some plant extracts may have mild allelopathic effects at high concentration | 1:200 (very dilute) |
| Compost tea | Yes with excellent filtration | Filter through very fine cloth (multiple layers); coarser particles than Jeevamrutha | 1:10 to 1:20 |
| Solid vermicompost | No — never | Cannot be dissolved completely; will block emitters | Use as top-dress only, not through drip |
| Neem oil (for pest control) | No — blocks emitters | Neem oil does not dissolve in water; will coat and block emitters | Apply as foliar spray only |
How Does a Venturi Injector Work?
A venturi injector uses the Bernoulli principle — when water flows through a narrowed section, velocity increases and pressure drops. This pressure drop creates suction that draws liquid from a container into the water stream.
Setup:
- Install venturi injector in a bypass line around a section of your mainline (in parallel, not in series)
- Open the mainline section before and after the bypass; close the mainline section between them — this forces water through the bypass and through the venturi
- Connect suction tube to your bio-input container
- When the system runs, the venturi draws bio-input into the mainline at a rate of 1–5 litres per hour depending on pressure
Simpler alternative — bypass tank:
- A sealed pressure tank (20–200 litre) connected to the mainline via two valves
- Fill tank with diluted bio-input
- When the irrigation runs, water pressure pushes through the tank, mixing with the bio-input
- Simpler than venturi but less precise; good for small systems
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Visit Our Shop →What Is the Fertigation Schedule for a ZBNF Farm?
Following Zero Budget Natural Farming protocol with drip fertigation:
| Frequency | Input | Dilution | Duration of Injection |
|---|---|---|---|
| Every 15 days | Jeevamrutha (filtered supernatant) | 1:50 to 1:100 | 20–30 minutes per zone; inject after 10 minutes of plain water irrigation |
| Once per month | Panchagavya (filtered) | 1:100 | 15–20 minutes per zone |
| Once per crop cycle (at transplant) | Beejamrutha-treated seedlings — fertigation not needed at this stage | Apply as soil drench manually at transplant | N/A — manual application |
| Once per month (for fruiting crops) | Fish amino acid or seaweed extract | 1:500 during fruiting stage | 15 minutes per zone |
| As needed for pest pressure | Dashparni Ark or chilli-garlic extract | Apply as foliar spray — NOT through drip | N/A — foliar spray only |
Always Flush After Fertigation — This Is Non-Negotiable
Every fertigation session must end with a 10-minute plain water flush through the entire drip system. Bio-inputs left in laterals and emitters overnight provide an ideal growth medium for algae and bacteria — within 48 hours, a previously clean system can develop serious biological blockage. The flush pushes bio-input residues out through the emitters into the root zone where they belong, and leaves the pipes full of clean water. This one-step habit extends the time between acid flushes from annually to every 2–3 years, and prevents the most common cause of emitter blockage in organic farms that use Jeevamrutha through drip.
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