Effetti di pratiche agronomiche sulla dinamica della sostanza organica: il caso di studio di un’azienda sperimentale nel Nord Italia

[Autom. eng. transl.] During 10 years (1995-2005) in the topsoil (0–40 cm) of the 35 plots of the experimental company Tadini (Northern Italy) parameters such as pH (water), Corg, Ntot, Passim, Kscamb, total carbonates, were measured and controlled. weaving. In particular, in 2 plots (named n.2 and n.3) where non-systematic additions of organic matter (SO) as manure were carried out (no addition for 5 consecutive years on the 10 suspects) a decrease in organic substance was observed by 15-16%, despite regular intake of nutrients (N, P and K) in an exclusively mineral form. Geostatistics has proved to be more suitable than the instruments of Classical Statistics (t tests of independent samples and Levene tests) in describing and representing the evolution of organic matter over time due to good values of r2 of cross validation (0.711 and 0.828 for start and end test data respectively).