Table 2.
Climatic and edaphic characteristics of study sites
| Study sites | Areaa | Climate |
Soil |
|||||
|---|---|---|---|---|---|---|---|---|
| T (° C) | P (mm) | pH | SOM (%) | N (%) | CaCO3 (%) | Gypsum (%) | ||
| Villamayor 1 (Z) | Z | 14·2 | 370 | 7·7 | 1·9 | 0·14 | 20·0 | 55·5 |
| Villamayor 2 (Z) | Z | 14·2 | 370 | 7·7 | 4·7 | 0·25 | 44·8 | 2·0 |
| Murillo de Gállego (Z) | Z | 12·8 | 680 | 7·6 | 3·9 | 0·13 | 38·4 | 0·0 |
| Orés (Z) | Z | 12·4 | 780 | 8·5 | 3·2 | 0·13 | 32·2 | 0·0 |
| Alcalá de Henares (M) | M | 13·2 | 350 | 7·8 | 1·8 | 0·15 | 20·6 | 32·0 |
| Chinchón (M) | M | 13·8 | 422 | 7·7 | 2·1 | 0·12 | 9·7 | 59·3 |
| Santos de la Humosa (M) | M | 13·0 | 450 | 8·3 | 5·2 | 0·22 | 38·8 | 0·0 |
| Villarejo (M) | M | 13·5 | 445 | 8·2 | 4·7 | 0·18 | 35·4 | 0·0 |
| Valdarachas (M) | M | 13·3 | 440 | 7·9 | 2·8 | 0·11 | 19·3 | 40·4 |
| Tendilla (Cu) | M | 13·0 | 410 | 7·8 | 2·4 | 0·17 | 22·3 | 29·3 |
T = Mean annual temperature; P = total annual rainfall; SOM = soil organic matter; N = nitrogen.
aM = Madrid (central Spain, Middle Tajo Basin); Z = Zaragoza (north-east Spain, Middle Ebro Basin).