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Agronomic Value of Alkaline-Stabilized Sewage Biosolids for Spring Barley

^a Agric. and Environ. Sci. Division, Dep. of Agric. and Rural Dev. for N. Ireland, Newforge Lane, Belfast, United Kingdom BT9 5PX
^b N. Ireland Agric. Res. Inst., Large Park, Hillsborough, United Kingdom BT26 6DR
^c Greenmount College of Agric. and Hortic., Antrim, United Kingdom BT41 4PU
^d N. Ireland Water Serv., 39 Slaght Road, Ballymena, United Kingdom BT42 2JE. Research supported by the Dep. of Agric. and Rural Dev. for N. Ireland and N. Ireland Water Serv

View larger version (33K): [in a new window]   Fig. 1 Agri-soil process flow diagram

View larger version (13K): [in a new window]   Fig. 2 Mean annual grain-response curves to increasing application rate of fertilizer and biosolid P at the Antrim site

View larger version (14K): [in a new window]   Fig. 3 Mean annual grain-response curves to increasing application rate of fertilizer and biosolid K at the Hillsborough site

View larger version (12K): [in a new window]   Fig. 4 Calculated mean annual P balance (inputs from fertilizer or biosolids - outputs in grain and straw) plotted against mean soil Olsen P at Antrim. . Diamond, control; squares, fertilizer; triangles, biosolids

View larger version (13K): [in a new window]   Fig. 5 Calculated mean annual K balance (inputs from fertilizer or biosolids - outputs in grain and straw) plotted against mean soil exchangeable K at Hillsborough. . Diamond, control; squares, fertilizer; triangles, biosolids