Fig. 7From: Impact of organic fertilization by the digestate from by-product on growth, yield and fruit quality of tomato (Solanum lycopersicon) and soil properties under greenhouse and field conditionsSpearman correlation coefficients between soil indicators and tomato growth and yield/quality under different fertilization types. Red and blue circles represent positive and negative correlations, respectively. *,Ā pā<ā0.05 and **, pā<ā0.01Back to article page