Hilling and soil covering in bunching onion yield with two harvests

Hilling and soil covering in bunching onion yield with two harvests. 'Todo Ano' bunching onion was studied and cultivated in soil without and with covering of semi-decomposed chicken manure in doses of 0 and 10 t ha(-1) with 0, 1 and 2 billings, with two harvest dates. The treatments were arranged in a 2 x 3 factorial scheme, in an experimental randomized blocks design, with live replications. Plants were harvested 64 days after planting and 40 days after the last cut (104 days alter planting). The tallest (38.1 cm) and the shortest (27.2 cm) plant heights were obtained using treatments with and without covering of chicken manure and one billing, respectively. The widest diameter of the tiller neck was 5.92 mm at 64 days alter planting in with chicken manure treatments and without billing and the smallest was 4.56 mm at 104 days after planting, in without chicken manure treatment with one hilling. The greatest yield of fresh mass was on the second harvest, in relation to the first, regardless of the studied factors. The best total income was with chicken manure treatment and with two billings (R$ 23,511.00) because it induced a gain of R$ 2,611.00 in relation to those with one hilling, which was the worst in with chicken manure treatments, and of R$ 13,619.00 in relation to without chicken manure treatment and without hillings which induced the greatest gain in without chicken manure treatments.