Fig. 1. Effect of (A) preflood and (B) midseason N rate on Cocodrie or LaGrue rice grain yields in five studies conducted at the Pine Tree Branch Station (PTBS) and Rice Research Extension Center (RREC) during 2001 (01) and 2002 (02). For the environment x preflood N rate interaction (A), the LSD_(0.05) values to compare grain yield among preflood N rates within an environment = 372 kg ha^–1 and between environments = 382 kg ha^–1. For the environment x midseason N rate interaction (B), the LSD_(0.05) values to compare grain yield among preflood N rates within an environment = 322 kg ha^–1 and between environments = 333 kg ha^–1.