PowerPoint by Herman Adams, CARDI, presented at the First Workshop on the System of Rice Intensification (SRI) in Latin America at EARTH University in Costa Rica, Oct. 31-Nov. 1, 2011

1. A CARDI PROJECT Prepared for the First International Workshop on Intensive Rice Production Sponsored by Cornell and EARTH Universities, Las Mercedes, Costa Rica 31 October – 1 November 2011 Evaluation of the Urea Deep Placement (UDP) Technology in Irrigated Lowland, Direct-Seeded Rice in Guyana Herman Adams and Bruce Lauckner, Collaborators: Ghansham Payman (GRDB) and Upendra Singh (IFDC)

3. THE CARIBBEAN

4. BURMA RICE RESEARCH STATION IN GUYANA

7. METHODOLOGY (cont’d) Table 1 The treatments 7 field trials were conducted between 2009 – 2010 in Guyana * A single control RATES OF N (kg/ha) METHOD OF UREA APPLICATION UREA BROADCAST (UB) UREA DEEP PLACEMENT (UDP) 57 UB 57 UDP 57 84 UB 84 UDP 84 122 UB 122 UDP 122 0 Control* Control*

11. Table 3 The best treatments which produced significant differences in the individual trials and for the combined data Parameters which showed significant differences Best treatments 1.Plant height in Trial # 1 UDP 57 and UB 57 2.Grain yield in Trial # 2 UDP 57 and UB 84 3.Grain yield in Trial # 3 UDP 84 and UB 57 4.Straw dry weight in Trial # 4 UDP 57 5.Filled grains in Trial # 6 UDP 57 6.Dry grain yield in Trial # 6 UDP 57 and UB 57 7.Wet grain yield in Trial # 6 UDP 57 8.Dry grain yield in Trial # 7 UDP 57 and UB 84 9.Wet straw weight in Trial # 7 UDP 57 and UB 57 10.Grain yield from combined data from all 7 trials UDP 57 and UB 57

14. Figure 1 Panoramic view of UDP trials before flowering; note difference in green leaf colour between plots

15. Figure 2: View of plots before harvest

16. Figure 3: Highest rate of N caused extensive lodging

17. Thank you