“…mended rates of nitrogen, phosphate, and potash application in Texas district 8 from commercial fertilizers for peanuts, wheat, sorghum, corn and oat are 17:67:67; 94:52:0; 109:57:0; 94:52:0; and 13:13:13 N:P 2 O 5 :K 2 O kg/ha, respectively (Texas Crop and Livestock Budgets, 1997). Loading ($0.55/ton), transporting ($0.07/ton/ km), and land application costs ($8.65/ha) used in this study were obtained from economic studies of broiler litter (Paudel et al, 2002(Paudel et al, -2003(Paudel et al, , 2004Paudel and McIntosh, 2005) and industrial sewage (Kriesel et al, 1994) utilization and transportation as substitutes for chemical fertilizers.…”