Presentation on theme: "Acorn Strategies How Acorn Size Influences Seedling Size and Possible Choices."— Presentation transcript:
Acorn Strategies How Acorn Size Influences Seedling Size and Possible Choices
Acorns Sized by Round Hole Screens Four nurseries in Study –Wilson, JP : Red oak only –Valonia, Penn : Red and white oak Made as many sizes as possible with round hole screens All lots floated to remove poor seeds Planted by hand for precise placement Fall 2001
2-0 white oak, Penn Nursery Larger acorns planted on left Smaller acorns planted on right
Data from Wilson and JP Red Oak only 1-0 seedlings Wilson 8 sizes and 10 blocks JP 10 sizes and 8 blocks Trees undercut with tractor, lifted by hand, bagged by plot Measured at Purdue Plot means analyzed by regression
So What? Larger acorns on the average give bigger average seedlings. –Aid in getting bigger trees –Tailor fertilizer and water to the acorn size for uniform crop. Smaller acorns can be stored on the stump –Large acorns 1-0 –Smaller acorns 2-0
Next Step Size larger seed lots with mechanical sizer Plant larger plots Test how the procedure goes operationally Two more nurseries to lift Take data on white oak JP seedlings have been outplanted –Does this treatment effect field performance?