Tab. 1: Fertilizer mixture according to advice from Kekkilä

Tomatoes received standard nutrition consisting of “Sérblandað Superex L 549” or “Tómato Superex L 553” (Kekkilä) according to the following fertilizer plan (Tab. 1):

Tab. 1: Fertilizer mixture according to advice from Kekkilä. Stem solution A (1000 l) Stem solution B (1000 l) Irrigation water Runoff water

Fertilizer (amount in kg)

Strong vegetable Superex L 540 Calcium nitrate Calcium chloride Potassium nitrate Urea Nitric acid (38 %) E.C. (mS/cm) pH E.C. (mS/cm) pH

1.-4. week

(after planting)

125 100 3,5 4,56,0 5,76,2

next 2 months 125 75 5 25 10 10 2,7 3,54,5 5,76,2

Stem solution A

(1000 l) Stem solution B

(1000 l) Irrigation water Runoff water

Fertilizer (amount in kg)

Tomato Superex L 553 Potassium nitrate Potassium suplhate Restart (l) Magnesium sulphate Calcium nitrate Potassium chloride Magnesium nitrate E.C. (mS/cm) pH E.C. (mS/cm) pH

until topping 50 25 10 25 102 8 15 2,62,8

From topping to end

75 16 16 47 142 16 2,22,6 5,35,6 2,53,0 5,76,2

5,35,6 2,53,0 5,76,2

Plants were irrigated through drip irrigation (4 tubes per bucket). Irrigation differed in cabinets (Tab. 2).