Performance of Randomized Block Designs in Field Experiments

Autor:	R. Guillemette, C. S. Lin, H. D. Voldeng, M. R. Binns
Rok vydání:	1993
Předmět:	Variation (linguistics) Total sum of squares Agronomy Field experiment Orientation (geometry) Statistics Randomized block design Spatial variability Blocking (statistics) Agronomy and Crop Science Completely randomized design Mathematics
Zdroj:	Agronomy Journal. 85:168-171
ISSN:	1435-0645 0002-1962
DOI:	10.2134/agronj1993.00021962008500010030x
Popis:	Successful application of randomized block design in field experimentation depends on whether the blocking is done properly with respect to the direction of soil variation, and on whether plot variability within blocks is homogeneous. To investigate to what extent the first problem (orientation) causes inefficiency in the design, 60 sets of uniformity trial data of soybean [Glycine max (L.) Merr] yield were used to investigate soil variation in one and two directions. The results show that the total sum of squares of soil variation attributable to one direction (taking the direction of the larger variation of row or column) was 39.3%, and to two directions was 52.7%. The difference of 13.4% reflects the tact that the blocking was not perpendicular to the direction of the soil variation []
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13a1fc931741c0a99c8ab46bdbe75adb https://doi.org/10.2134/agronj1993.00021962008500010030x Zobrazit plný text záznamu Plný text