DEVELOPMENTS IN THE MEASUREMENT OF AIR FILLED POROSITY OF PEAT SUBSTRATES
A modified method for the measurement of Air Filled Porosity (AFP) has been developed by the Research & Development Department of Bord na Mona, Ireland in order to provide a robust laboratory method for the determination of the drainage properties of peat substrates destined for use in nursery stock. A special vessel with a rigid extension collar and a sealable base is used for this test and overcomes problems encountered when using standard flower pots.
The effects of newly available peat amendments - namely peat fibre and coarse peat particles - were determined, and their possible contribution to the development of nursery stock media is discussed.
Byrne, P.J. and Carty, B. (1989). DEVELOPMENTS IN THE MEASUREMENT OF AIR FILLED POROSITY OF PEAT SUBSTRATES. Acta Hortic. 238, 37-44