An agglomerated powder supplement may improve the efficiency of mineralization of grazing cattle.

Losses in mineral supplementation of grazing cattle is likely to occur in unsheltered troughs, mainly throughout the rainy season both by lixiviation and hardening. The aim was to evaluate supplement consumption, lixiviation due to precipitation, and hardening behavior comparing a regular powder mineral supplement (REG) and an agglomerated powder mineral supplement (AGL) provided to grazing heifers in the rainy season. The study was carried out between December 21th 2016 and April 20th 2017, in Campo Grande, MS, Brazil.