The cowpea is a leguminous of great importance for human consumption, providing a source of protein for most of urban population of northern Brazil, therefore the aim of this paper was to evaluate the efficiency of strains of Bradyrhizobium out in association with phosphate and potassium fertilization (PK) in cowpea at the field level in the municipality of Capitão Poço - PA. Two experiments were carried out in randomized blocks with four replications, consisting of five treatments, being two strains of Bradyrhizobium - BR 3262 and BR 3267, a treatment only with PK, another one with NPK in the formulation (10-28-20) and a control. It was evaluated the grain yield, the number of pods and weight of 100 seeds. Fertilization with phosphorus and potassium represented a significant increase in the yield of cowpea, however inoculation with both strains did not increase production.

Mastitis is responsible for expressive losses in the breeding systems of ovine due to the low development of lambs or death because of starvation, beyond precocious discarding and occasionally the death of sheep. Studies had been carried through to determine the occurrence of mastitis in the north of Minas Gerais, to characterize the main etiological agents involved and identify the predispose factors of handling to the disease. The occurrence of mastitis under the clinical form was 11.19% and under the sub clinical form 54.54% of the analyzed cases, predominating as etiological agent the coagulase-negative staphylococci. The epidemiologist characterization of the frequency of the installations cleanness (P<0.05) and the practical of depletes of females (P<0.01) presented relation of dependence with the occurrence of illness, having been this work a contribution for the elaboration of prophylactic rules of mastitis in ovine breeding in the north of Minas Gerais.