## 2 Materials and Methods  
### General Methods  
Research was conducted on the industrial tomato (_Solanum lycopersicum_ L.) hybrid Coronnel F\({}_{1}\) (ISI Sementi, Parma, Italy) at the experimental fields of the Department of Agricultural Sciences of Naples University 'Federico II' (40\({}^{\circ}\)49\({}^{\prime}\)11\({}^{\prime\prime}\) N, 14\({}^{\circ}\)20\({}^{\prime}\)28\({}^{\prime\prime}\) E) in 2019 and 2020.  
The experimental setup was based on the factorial combination of three fertilization types (compost, compost + mineral 50/50 v, and mineral) and three soil textures (clayey, loamy, and sandy).  
The crop nutritional requirements were calculated based on the 'Regional Fertilization Guide of Campania Region' [22].  
The physicochemical characteristics of the compost applied were as follows: pH 7.70; humidity, 18.4%; organic carbon, 28.3% d.m.; humic and fulvic carbon, 12.1% d.m.; total N, 2.43% N d.m.; organic N, 94.54% total N; C-N ratio, 11.65; EC, 4.80 dS m\({}^{-1}\); Cd, <0.5 mg kg\({}^{-1}\) d.m.; Cr VI < 0.5 mg kg\({}^{-1}\) d.m.; Hg < 0.2 mg kg\({}^{-1}\) d.m.; Ni, 7.5 mg kg\({}^{-1}\) d.m.; Pb, 13.0 mg kg\({}^{-1}\) d.m.; Cu, 54.2 mg kg\({}^{-1}\) d.m.; Zn, 138.8 mg kg\({}^{-1}\) d.m.; Na, 5471.0 mg kg\({}^{-1}\) d.m.; available P (P\({}_{2}\)O\({}_{5}\)), 1.6% d.m.; available K (K\({}_{2}\)O), 1.5% d.m.  
The compost used in the present research derived from a process of transforming and stabilizing crop organic residues. The transformation process consisted of two stages: the bio-oxidation phase (aerobic and exothermic), characterized by a high rate of degradation achieved through the sanitization of the plant material at a high temperature, and the subsequent ripening or curing phase. In the second stage, to obtain mature compost, microbial consortia (e.g., fungi and actinomycetes) actively degraded starch, cellulose, and lignin.  
Based on industrial tomato requirements, ten tons per hectare of compost, and a half dose when combined with mineral fertilizer, were prepared prior to transplant. At the same time, the treatment associated with 100% mineral fertilization consisted of 80 kg\(\cdot\)ha\({}^{-1}\) P\({}_{2}\)O\({}_{5}\), 80 K\({}_{2}\)O, and 60 N supplied in the form of mineral fertilizer, whereas the remaining 120 kg\(\cdot\)ha\({}^{-1}\) N was given through fertigation during the crops; half-doses were provided corresponding to the combined compost + mineral fertilization treatment. All the mentioned fertilizer amounts, either organic or mineral, were differently increased based on the soil texture: in loamy soil, 25% additional quantities of N, P\({}_{2}\)O\({}_{5}\), and K\({}_{2}\)O were applied; in sandy soil, 40% increases of the three macro-elements were applied; and in clayey soil, an additional 20% N and 30% P\({}_{2}\)O\({}_{5}\) and K\({}_{2}\)O were applied.  
A randomized complete block design with three replications was used to distribute the treatments in the field, and each experimental unit had a 25 m\({}^{2}\) surface area. A random sample of 100 fruits was collected from 10 plants in each plot, 20 of which were immediately stored at \(-\)80 \({}^{\circ}\)C and subsequently used for qualitative analyses. The transplant was carried out on 10 and 11 May in 2019 and 2020, respectively, in double rows with a density of 3.2 plants per m\({}^{2}\) in soil mulched with a yellow photo-selective and photo-reflective sheet (Ginegar Plastic, Ginegar, Israel), 25 \(\upmu\)m thick. Weekly irrigation was practiced until 10 days prior to the predicted fruit harvest.  
Harvest was performed on 23-24 August when 80% of the fruits were ripe, and in each plot, the total number and weight of marketable fruits were measured, whereas the mean fruit weight was determined from 15 fruit samples.