experiment The effects on melon plant development were evaluated in a greenhouse at CRA-CIN, Bologna, Italy (44.302700 N; 11.21504E 54 m above sea level).
Pots (12 cm height and 14 cm diam.) were filled with 1l of each of the 3 soils described above, after drying and sieving. The following treatments were compared, according to a randomized block design with 2 replicates (pots):