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Research Study:
California Central Valley,
Clipper v. 12" paper carton v. 24" paper carton
Data taken: Height at planting. Height at end of growing
season, Stem caliber at end of growing season.
Chart Analysis: One of the
key objectives in vine establishment is to produce a vine with
substantial biomass. This study compares the relative biomass of
vines produced under three treatments. To compare the relative
biomass of the treatments, we calculate a plant growth or volume
index by using the formula for the volume of the cylinder. While
the calculated value will not be the exact volume it is a valid
basis to compare the relative biomass. Volume index equals the
vine height multiplied by pi multiplied by the square of the stems
radius. GI = H x Pi x R2
Two critical factors in
achieving a large second year harvest are training the vines up
onto the cordon or fruiting wire in the first leaf and growing
vines with sufficient biomass to support a crop.
24" Tall Paper Carton v
12" Tall Paper Carton: In this study, there was no
significant difference in the growth achieved in a 24" tall
paper carton as compared to a 12" milk carton. (In fact the
tall paper was numerically inferior to the milk carton.)
Clipper v 24" Paper Carton
v 12" Paper Carton: In this study the vines in the
Clipper are nearly 4 times larger than the vines grown in any of
the paper cartons.
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