Fig. 3. Bedding x location effects on mean values (±1 SE) of dissolved reactive phosphorus, DRP (a), total P (b), and NH₄–N (c) in 1998, and total Kjeldahl nitrogen (d) in runoff in 1999 from a feedlot in southern Alberta. Mean values with the same lowercase letter are not significantly (P > 0.05) different. Labels on the x axis are ST (straw), WD (wood), BP (bedding pack), and PF (pen floor).