Potato Review Group

Contents

Target nutrient concentrations

Nutrient concentrations and indices

 

Target nutrient concentrations

  1. The following data, from various sources, provide guidance on required concentrations of nutrients in soil.
  2. Always use the PRG models to calculate requirements of N, P and K fertilisers.
  3. Availability of nutrients may be influenced by soil moisture, root growth and interactions with nutrients, clay, organic matter, etc, in soil.
  4. Use tissue samples to check actual availability of nutrients.

Soil nutrient concentrations

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Nutrient concentrations and indices

  1. Concentrations of available nutrients are measured by standard soil tests as mg / litre.
  2. Concentrations may also be expressed according to the Defra Index scale.

Nutrient concentrations and indexes

Potash Development Association (2011) Leaflet 24.

 

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