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  • Author or Editor: R.M. Baranowski x
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Abstract

Fruit number and weight per tree were recorded for 3 years for 2 avocado (Persea americana M.) cultivars—‘Booth 8’ and ‘Peterson’. Sample variances were used to determine the number of years per experiment and trees per treatment required to detect differences in yield among treatments at the 5% and 10% significance levels for each cultivar. Yearly variability was greater than variability among trees for both cultivars. Yearly variability for total fruit weight was greater for ‘Booth 8’ than for ‘Peterson’. Fifteen trees per treatment were required to detect a 10–20% difference in total fruit weight per treatment at the 5% level of significance. Each additional tree per treatment decreased the percentage of detectable difference only slightly. Increasing the number of years per experiment decreased the percentage of detectable difference. However, after 3 years, additional years decreased the percentage of detectable difference only slightly for both an alternate- and a nonalternate-bearing cultivar. Efficient designs for avocado yield experiments for the cultivars tested should consist of 10 to 15 trees per treatment and should be conducted for at least 3 years.

Open Access