2.1. Plant material
The plants were grown following the technique usually implemented
by the local producers. Tomatoes were grown in soil, with a 3.94% humus content, pH 6.65 (in KCl) containing nutrients as follows: N 10 mg 100 g−1, P >40 mg 100 g−1, K >40 mg 100 g−1.
Stable manure (20 t ha−1) was used as an organic fertilizer and
nitrophos blue special (N12:P12:K17, +2MgO + 8S + trace elements,
K + S nitrogen) was used as a mineral fertilizer.
Seedlings were transplanted on May 5 (plant density was 2.6 plants m−2), the shading
nets were subsequently installed above the crop on June 10 (35 days after transplanting) and the measurements were carried out until September 5.
All plants were irrigated using drip irrigation.
The tomatoes used in the study were harvested at the mature-pink stage.