94-8 Soil Phosphorus Accumulation Following 20 Years of Wheat-Fallow with Biosolids.
See more from this Division: ASA Section: Environmental QualitySee more from this Session: Environmental Quality: I
Monday, November 3, 2014: 10:10 AM
Long Beach Convention Center, Room 202C
Beginning in 1993, biosolids have been applied every other year to a wheat-fallow field north east Colorado. The biosolids were applied at five different rates, but for this study we focused on the control, 4.5 Mg/ha (agronomic rate), and 11 Mg/ha. Soil samples were collected down to 120 cm, following wheat harvest in 2013, in zero contamination tubes. The samples were then separated into 5-10 cm depth increments in the lab prior to analysis. The samples were then analyzed for CaCO3 and total P. The soil P was also fractionated into three inorganic pools and five organic pools. The results of the study will be presented.
See more from this Division: ASA Section: Environmental QualitySee more from this Session: Environmental Quality: I