Fertigation Dosing for Drip Irrigation

Overview

Fertigation — injecting soluble fertiliser directly into drip irrigation water — is the most efficient fertiliser delivery method available to Indian farmers and agro-processing operations. Nutrients reach the root zone in soluble form, reducing fertiliser waste by 30–50% compared to broadcast application and improving crop yield per rupee of input cost.

SEW's Vanguard Series triplex plunger pump injects fertiliser concentrate (NPK solution, micronutrient mix, water-soluble urea) into the drip mainline at a precise dose rate proportional to irrigation flow — maintaining consistent fertiliser concentration at every drip emitter across the field, regardless of mainline pressure variation.

How It Works

Fertiliser concentrate is mixed in a PE dosing tank at the required dilution ratio. The triplex pump draws from the tank and injects into the drip mainline through a check valve injection point — downstream of the main pump and filter station, upstream of the drip laterals. Injection rate is set by VFD to maintain target EC (electrical conductivity) in the irrigation water, measured by an inline EC sensor if the system is automated.

The positive displacement mechanism ensures consistent injection rate regardless of mainline pressure variation — important in undulating terrain where drip system pressure varies across zones.

Bare Unit Use

Agri-input distributors, irrigation system contractors, and large farm operators order the bare pump for fertigation systems being built on customer farms or for replacement of failed injectors on existing drip systems. Flow: 40–200 LPM injection rate. Pressure: up to 10 bar for drip system mainline injection.

Skid Package Use

SEW supplies complete fertigation dosing stations: PE dosing tank (200–2000 litre), triplex pump, VFD, pressure gauge, suction strainer, injection check valve, and EC monitoring port — mounted on a weather-resistant skid for outdoor farm installation. Sized to farm area, crop type, and fertiliser programme. Used in: large sugarcane, banana, and vegetable farms in Maharashtra; grape and pomegranate farms in Nashik and Sangli; cotton farms in Vidarbha.

Why SEW

Consistent dose rate across mainline pressure variation — positive displacement maintains injection rate regardless of pressure fluctuation in undulating terrain. Every emitter gets the same nutrient concentration.

40–200 LPM injection range — covers small 2-hectare farms to large 500+ hectare agro-industrial operations.

Maharashtra base, Nashik — located in India's largest horticultural belt. Local knowledge of drip irrigation practice, crop nutrient requirements, and dealer network.

Complete fertigation station — turnkey supply of tank, pump, controls, and injection hardware. No multiple-vendor assembly required.