8 recent trial results with ProtoPlus show positive impact on potato yield, compared to standard treatment

In 4 recent trials, starch content improved in comparison to standard treatment in all trials.

In 5 recent trials, dry matter contents were on average 1% higher with a positive effect in all trials. Crops in trials included potatoes, spinach, leek and grass.

3 recent trial results with ProtoPlus show positive impact on potato yield, compared to standard treatment

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Root development of Alchemilla mollis, organic fertilizer (left), mineral fertilizer (middle), organic fertilizer with Terra Fertiel concentrate (right).

Increased bacteria population in soil due to Terra Fertiel, also in combination with mineral fertilizers.

Increased fungi population in soil due to Terra Fertiel, also in combination with mineral fertilizers.

Results of 31 trials between 2010 - 2017 with ExSol P show a positive effect on yield.

17 trials show a largely positive impact of ExSol P on crop yield when fertilization is limited.