21.09.2016

  • The high input organic system turns out to be more profitable than the high input conventional system after the first four years. Considering the premium price of organic certified products, the gross margin was higher in organic, beginning from the fourth year on.
  • Soil fertility
  • High-input organic farming enhanced soil fertility by improving soil pH, potassium, calcium and magnesium compared to high-input conventional farming.
  • High- or low-input organic and conventional farming systems have similar effects on soil organic carbon content.
  • Pests and diseases

    • No significant differences were found between organic and conventional systems regarding diseases (maize streak disease, turcicum leaf blight and downey mildew).
    • No significant differences were found between organic and conventional systems regarding pests (aphids and stemborer), except at Chuka in 2010, where stemborer damage was higher in the conventional system compared to the organic system, and in 2011 and 2012, where the reverse was observed.
    • However, termites are constantly, and significantly more, abundant in organic systems compared to the conventional ones.