The phosphoric or phosphate rock (RF) obtained in the Bahía Inglesa region of Chile and marketed by the company Fosfatos de Caldera in that country is considered one of the most reactive phosphorites in the world.

The best agronomic results from the application of Bifox RF is achieved in acid soils. Thus, in soils with pH less than 6.0 where grain crops are cultivated, a very high relative agronomic efficiency (EAR) to soluble phosphate sources can be expected, while in soils with neutral pH the EAR could vary between 80 and 90%. depending on the content of exchange bases, texture, clay mineralogy, among other factors.

On the other hand, in perennial pastures or improved pastures or natural fields, the EAR can exceed 100% in relation to soluble fertilizers, due to the progressive release of P from RF over the years.

The experimental work carried out in Argentine soils in perennial ryegrass pastures allowed us to validate and confirm the results observed in southern Chilean soils in perennial pastures, annual forage grasses, rapeseed, wheat, among other crops.