Matar, Abdallah2024-12-132024-12-13John Ryan, Abdallah Matar. (31/12/1988). Soil Test Calibration in West Asia and North Africa: Proceedings of the Third Regional Workshop. Beirut, Lebanon.https://hdl.handle.net/20.500.11766/69741Proceedings of the Third Regional workshop held in Amman, Jordan on 3-9 September 1988.PDFCC-BY-SA-4.0soil test calibrationfertilization ratesConference ProceedingsOpen access