RESPONSES OF UPLAND RICE TO TILLAGE, SEEDING METHOD AND SPACING IN THE INLAND VALLEY OF RAINFOREST/SAVANNA TRANSITORY ZONE OF NIGERIA

Abstract

Two field trials were conducted at Abeokuta and Ibadan with the aim of investigating the performance
of upland rice (NERICAª¤¢î 2) in inland valley Rainforest / Savannah transitory zone of South West Nige-
ria as influenced by tillage practise, seeding method and spacing. The trials were arranged in split-split
plot fitted to randomised completely blocked design, replicated thrice. The main plot was tillage
(minimum tillage and conventional); sub-plot was seeding method (dry dibble and transplanting) and
the sub-sub plot was spacing (15 cm ªª? 15 cm, 20 cm ªª? 20 cm and 25 cm ªª? 25 cm). Dry dibble had
significantly more number of tillers, leaf area index and dry matter accumulation than transplanted rice
at both locations. Most growth parameters, at both locations had a significant increase with increasing
plant population density, except dry matter accumulation. At both locations, transplanted rice had a
significant longer flowering and maturity duration than dibble method. In Abeokuta, conventional tillage
had significantly longer panicle length than minimum tillage. Dry dibble method had significantly more
number of panicle/m2 at Abeokuta, while significantly more number of grains/panicle was observed at
Ibadan than transplanting. Increasing plant population density significantly depressed some yield com-
ponents and yield at Ibadan.