Fertilizer Calculator

Fertilizer Calculator

Author: Mr. Guy Sela, CEO of SMART! Fertilizer Management software and an international expert in plant nutrition and irrigation.

SMART! is an advanced fertilizer calculator that eliminates guess work from growing, by using unique algorithms that calculate precise fertilizer recommendations for any crop.

Most growers do not achieve accurate fertilization, because of the tremendous challenge of grasping and incorporating the multitude of variables and multi-disciplinary knowledge involved in the process.

Therefore, most growers rely on estimation, past experience and trial-and-error. As a result, huge amounts of fertilizers are wasted each year.

The SMART! calculator enables growers to gain full control over their fertilizer management process. The unique algorithm calculates the exact fertilizer rates required, based on field conditions, crop nutrient requirements and hudreds of dynamic parameters.


  •   Minimizes Fertilizer Costs
  •   Increases Crop Yield
  •   Advanced calculations made easy
  •   Prevents soil pollution and soil salinity




  •   Calculates ideal fertlizer programs within minutes
  •   Balances all plant nutrients and fertilizer mixes
  •   Calculates fertilizer blends
  •   Interprets soil , water and plant tissue analysis
  •   Designs fertilizer stock solutions for fertigation
  •   Designs nutrient solutions for hydroponics
  •   Converts measurement units (ionic forms, concentrations, rates and amounts).
  •   Generates personalized reports

Calculation results of fertilizer rates are available in various units, such as lbs/acre, kg/ha, g/m3, mmo/l and more.

How Does SMART! Work?

  •   Selects and calculates the optimal fertilizer rates and mixture, based on the nutrient requirements of the crop, at the different growth stages, and field data – water, soil and plant analysis.
  •   Precise directions for an optimal application of fertilizers.
  •   Generates fertilizer recommendations for open field, fertigation or hydroponics.
  •    Recommendations are based on vast information and exact chemical calculations.