Two field experiments were conducted on a dystrophic Dark Red Latosol (Haplortox) to study the effects of lime, cobalt and molybdenum on chlorophyll contents in the leaves of peanut. Seed treatments (cobalt, molybdenum, cobalt + molybdenum and no treatment) were applied in two peanut cultivars ("Tatu" and "Tupã") grown in four rates of lime (0, 4, 6 and 8 t ha-1), causing an increase in leaf chlorophyll contents either due to Mo or lime application. Chlorophyll contents in the leaves were correlated with N contents, showing that the effects of Mo and lime occurred as consequence of a better symbiotic N fixation and nitrogenase activity. The response of pod and grain yields in cv. "Tatu" was linear with the increase of chlorophyll contents. Maximum pod and grain yields in cv. "Tupã" were observed when the chlorophyll content was 4.6 mg dm-2.
Arachis hypogaea; soil acidity; nitrogen