Growth analysis of potatoes (Solanum tuberosum L.) in response to nitrogen split application in a red yellowish Latossol

The experimental design was in full randomized block with 3 treatments and 4 replications. The treatment T1 was applied 80 kg.ha-1 of ammonium sulphate during the billing; the treatment T2 was applied 40 kg.ha-1 of ammonium sulphate during the emergence and 40 kg.ha(-1) during the hilling and the treatment T3 was applied 40 kg.ha(-1) of ammonium sulphate during the hilling and 40 kg.ha(-1) at 15 days after the hilling. The physiological parameters plant top dry matter, absolute growth rate and relative growth rate presented the same tendency, in all treatments, and crop yield did not differ significatively among the treatments. The analysis of physiological and production parameters, allow to conclude that the cultivation of the potato was not affected by the split application of nitrogen.