Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
The alkaline calcareous nature, high pH, salinity, heavy metals pollution and low organic matter content of the soils in many parts of the world have diminished the soil fertility and made essential nutrients unavailable to crops.