Determining the Suitable Sample Size for Measuring Some Characteristics in Soybean Experiments

Abstract

The article is written based on of six field soybean experiments conducted at Gialam, Hanoi in two years of 2006 and 2007. Experiment types include of soybean variety comparison experiment and experiments involving application of a-NAA, molipdenum, microbial organic fertilizer, and foliar fertilizers. The  soybean varieties include D140, DT84 and DVN46. Based on significant levels (5%) and admitted errors (10%), it was suggested sample size should be 7, 28, 14, 3, 26, and 28 plants for plant height, branching height, total primary branches, total branching nodes per plant, total pods per plant, and total filled pods per plant, respectively