Trace metals Treatments Control Fertilizer 25 Mg ha-1† 25 Mg ha-1     -----------------------------------  mg  ------------------------------------ Cd 44 48 42 57 Cr 242 312 266 312 Ni 772 879 968 921 Pb 1613 1493 1709 1586 † Biosolid rates, dry matter basis.

Table 1: Estimates of the forage Cd, Cr, Ni and Pb intake by sheep in 206 days at the Juarez Valley, Chihuahua, Mexico.