Utilization of Power Analysis in Horticulture

The aim of this study was to determine associations and the values of power analysis as their reliability degrees between Year or Cultivars and traits such as fruit weight (FW), total acid (TA) and, the soluble substance that can be dissolved in water (SSDW) from various ten raspberry cultivars in an adaptation study regarding horticulture field by using Chi-Square and Likelihood Ratio Chi-Square statistics after FW, TA and SSDW were categorized as binary (low and high). Association between FW and CULTIVAR, association between SSDW and YEAR, association between SSDW and CULTIVAR, association between TA and CULTIVAR were much more significant (P<0.001). Besides, corresponding power values for Chi-Square and Likelihood Ratio Chi-Square statistics were very close on each other and had a reliability of approximately 100% and enough sample size. Contrary to these four contingency tables, associations between both FW-YEAR and TA-YEAR were non-significant and non-reliable because corresponding power values for Chi-Square and Likelihood Ratio Chi-Square statistic were 50-51% (a power of moderate-level) and 22-23% (power of low level), respectively and sufficient sample sizes for both FW-YEAR and TA-YEAR should be 240 and 560, respectively in order to provide a power of 80%. As a result, in order to be obtained reliable results and determined enough sample size in Chi-Square and Likelihood Ratio Chi-Square Statistics, power analysis should be performed

Comparison of Some Raspberry Cultivars' Herbal Features by Repeated Random Complete Design Statistic Technique.

The aim of this study was comparatively to examine herbal traits of the cultivars such as Rubin, Summit, Holland Dwarf, Heritage, Tulameen, Aksu Red, Nuburg, Canby and Willamette red raspberries cultivated at Ankara Condition, in the capital of Turkey between 2002 and 2005. According to Repeated Random Complete Design (RRCD) (which was composed of four random plot design experiments) used in the experiment, the effects of cultivar, year and cultivar by year interaction on herbal traits such as the height of shoot, diameter of shoot, number of shoot, fruitfulness of shoot and weight of fruit were further more significant (p < 0.0001). Besides, determination coefficients of RRCD for traits ranged from 95.60 to 99.94% (very-high). As a result, we concluded in Ankara condition that as to herbal traits such as the height of shoot, diameter of shoot, number of shoot, fruitfulness of shoot and weight of fruit, Willamette cultivar were more superior to others. In addition, we can suggest that researchers should analyze using RRCD because Determination Coefficients of RRCD for all traits were much more found