Assessing phosphorus extractability by Olsen P and AL-P tests in acid soils after P fertilization with compost versus mineral fertilizer.

The article focuses on assessing of phosphorus (P) extractability by Soil P tests like Olsen P and AL-P tests in acid soils after P fertilization with compost versus mineral fertilizer. It states that Soil P tests and Ammonium Lactate methods are useful tools to assess P phytoavailability. It states that there was a significant increase in soil P availability relatively to the single superphosphate (SSP) treatments.