Fig. 2 Solution 31P-nuclear magnetic resonance spectra of dialyzed NaOH extracts obtained from the sand silt and clay separates of the Askov soil under unfertilized (0), inorganic fertilized (2NPK), and animal manure (2AM) treatments
Fig. 2 Solution 31P-nuclear magnetic resonance spectra of dialyzed NaOH extracts obtained from the sand silt and clay separates of the Askov soil under unfertilized (0), inorganic fertilized (2NPK), and animal manure (2AM) treatments