Optimal plot size in single or intercropping sorghum and showy rattlebox

The objective of this study was to determine the optimal plot size evaluate fresh matter productivity sorghum (Sorghum bicolor (L.) Moench) and showy rattlebox (Crotalaria spectabilis Roth.). Fifteen uniformity trials (blank experiments) with rattlebox, in single or intercropping, were carried out. evaluated 540 basic experimental units (BEU) 1 × m (15 36 BEU per trial). determined by method Hatheway (1961), scenarios formed combinations treatment numbers, repetitions levels precision. To 5 30 treatments five repetitions, plots 10 m² useful area are sufficient for differences between 24% overall average experiment be considered significant at 0.05 probability.