EVALUATION OF SEED DELINTING METHODS AND SOWING PATTERNS IN
CARLOS A. SCOTTI RUY S. YAMAOKA
Mechanical and chemical cottonseed (G. hirsutum L.) delinting, depth of
sowing and patterns of seed distribution were evaluated in clay soil of Londrina, Paraná, in 1975/76 and 1976/77, under field condition, based on speed of emergence index and percentege seedling emergence. In all trials shallow was superior to deep sowing. During 1976/77 equidistant seed distribution was better than sowing 5 seeds at each 20cm. In one of the experiments, interaction was observed between seed distribution pattern and
sowing depth as measured by speed emergence. No signifïcant differences were
observed between methods of delinting. There was a highly signifïcant correlation between speed of emergence index and percentage of emergence in all the experiments, indicating the latter as an advantageous criterion in view of the facility in obtaining this data.