Loss of organic material in the soil

A theoretical estimation to give an idea of the yearly loss organic material.

Principles

  • Cultivated topsoil: 25 cm (0,25 m)
  • Surface: 10.000 m²
  • Organic matter: 2%
  • Specific gravity soil: 1.300 kg / m³
  • Mineralisation factor: 3% year
  • Organic matter FERTIPLUS 65%

Cultivated soil

  • 0,25 m x 10.000 m² x 1.300 kg / m³ = 3.250.000 kg
  • Total organic matter in soil: 3.250.000 x 2% = 65.000 kg

Yearly breakdown of organic matter

  • 65.000 kg x 3% = 1.950 kg

Replacement of organic matter

  • Crop rests in the field: 750 - 1.250 kg
  • Netto need of external organic material: 700 - 1.200 kg
  • In terms of Organic Fertilizer 4-3-3 65 OM: 1.100 - 1.850 kg

Conclusion

Although Organic Fertilizer is not only a substitute of organic material it can clearly be used for that. Organic Fertilizer should be used on base of crop needs in basic Fertilizer and organic matter replacement in your field.

Click here for an example.

Most important parameter on soil fertility is organic matter.