Indeed, the amounts of P, Mg, K, andCa released by burning forest and scrub vegetationare high in relation to both the total and availablequantities of these elements in soils (Raison, 1979). Inparticular phosphate loss can be very detrimental tosoil fertility (Thomas et al., 2000). In forests, burningoften causes the pH of the soil to rise by three units ormore, creating alkaline conditions where formerly therewas acidity.
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