Fertigation Dilution Ratio

\[R_d=\frac{C_s}{C_t}\]

Variables

Rddilution ratio (-)

Csstock solution concentration (g/L)

Cttarget concentration after dilution (g/L)

Description

What is this formula?

The Fertigation Dilution Ratio calculates how many parts of irrigation water are required to dilute a concentrated fertilizer stock solution to the desired nutrient concentration.

When to use it

Use this formula when preparing stock tanks, configuring injector systems, or verifying fertigation recipes for agricultural irrigation systems.

Example

A fertilizer stock solution has:

Cs = 200 g/L

Desired concentration in irrigation water:

Ct = 2 g/L

Formula:

Rd = Cs / Ct

Substitution:

Rd = 200 / 2

Rd = 100

Result:

The fertilizer solution must be diluted at a ratio of 100:1.

Applications

- Fertigation system setup

- Injector calibration

- Greenhouse nutrient management

- Stock tank preparation

- Precision agriculture

Note

This equation assumes ideal mixing and does not account for nutrient precipitation, chemical incompatibilities, or injector efficiency losses that may occur in real fertigation systems.