Table 2.
Soil characteristics (granulometric composition, physicochemical and chemical properties, microorganisms CFU)
| Properties | Kind of soil | Methods of determination | |
|---|---|---|---|
| Loamy sand (LS) | Sandy loam (SL) | ||
| Granulometric composition—% of fractions (d, mm) | |||
| Sand 2.00 ≥ d > 0.05 | 75.56a ± 4.54 | 47.92b ± 2.29 | Aerometric PN-R-04032 (1998) |
| Silt 0.05 ≥ d > 0.002 | 22.92b ± 1.15 | 48.71a ± 1.70 | |
| Clay d ≤ 0.002 | 1.52b ± 0.08 | 3.37a ± 0.21 | |
| pHKCl | 6.7a ± 0.2 | 6.8a ± 0.2 | Potentiometric ISO 10390 (2005) |
| mmol(+) kg−1 | |||
| HAC—hydrolytic acidity | 7.81b ± 0.41 | 5.22a ± 0.2 | Kappen Klute (1996) |
| EBC—exchangeable base cations | 98.72b ± 4.89 | 131.41a ± 6.01 | |
| CEC—cation exchange capacity | 106.53b ± 5.18 | 136.63a ± 6.08 | |
| % | |||
| BS—base saturation | 92.67b ± 3.12 | 96.18a ± 3.38 | |
| Content—g kg−1 | |||
| Corganic | 11.01a ± 0.52 | 9.92b ± 0.41 | Tiurin Nelson and Sommers (1996) |
| Ntotal | 0.97b ± 0.05 | 1.14a ± 0.06 | Kjeldahl ISO 11261 (1995) |
| Content mg kg−1 | |||
| Pavailable | 44.92b ± 1.41 | 47.94a ± 1.24 | Egner-Riehm Egner et al. (1960) |
| Kavailable | 75.21a ± 3.87 | 69.13b ± 3.38 | |
| Mgavailable | 21.93a ± 1.13 | 12.74b ± 0.51 | Atomic absorption spectrometry Schlichting et al. (1995) |
| Number of microorganisms—CFU 10n kg−1 | |||
| Oligotrophic bacteria | 14.53a ± 2.18 | 6.84b ± 1.03 | Substrates and abbreviations of microbial names are presented in Table 3 |
| Oligotrophic sporulating bacteria | 5.72a ± 0.80 | 4.75a ± 0.66 | |
| Copiotrophic bacteria | 10.11a ± 1.36 | 2.68b ± 0.36 | |
| Copiotrophic sporulating bacteria | 4.88a ± 0.49 | 5.53a ± 0.57 | |
| Azotobacter | 1.04b ± 0.12 | 5.53a ± 0.64 | |
| Arthrobacter | 10.24a ± 1.52 | 9.00a ± 1.33 | |
| Pseudomonas | 11.70b ± 1.76 | 26.02a ± 3.90 | |
| Ammonifying bacteria | 9.33a ± 1.52 | 10.96a ± 1.79 | |
| Nitrogen immobilisation bacteria | 12.55a ± 1.07 | 10.24b ± 1.19 | |
| Cellulolytic bacteria | 17.88a ± 3.06 | 3.93b ± 0.67 | |
| Actinomycetes | 9.65b ± 1.02 | 11.52a ± 0.81 | |
| Fungi | 4.29b ± 0.64 | 6.38a ± 0.96 | |
n—exponent: 8 for oligotrophic sporulating and copiotrophic sporulating bacteria; 7 for cellulolytic bacteria and Fungi; 4 for Azotobacter; 8 for Arthrobacter and Pseudomonas; 9 for other microorganisms. The same lowercase letters in the rows indicate homogeneous groups