CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 07
Float water alkalinity adjustment in organic seedling production 
(1) North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.; (2) North Carolina Department of Agriculture & Consumer Services – Agronomic Division, Raleigh, NC, U.S.A.
Float water bicarbonate (HCO3-) concentration in excess of 2.0 meq/L (100 ppm) can result in stunted, unusable seedlings unless neutralized. In conventional greenhouse systems, sulfuric acid is used for this purpose; however, it is not currently...