1996 Hemp Trials in Ontario, Canada 12-13

Courtesy of Gordon Scheifele, M.Sc et. al.: Previous pages 11-12 or Next pages 13-17

The percentage of fiber yield of total stem dry matter increases as stem diameter decreases (-65% correlation) Graph 17.4 below. Therefore, smaller diameter stems will have a higher percentage of total fiber yield of total stem dry matter.

The percentage of fiber yield of total stem dry matter increases as stem diameter decreases (-65% correlation) Graph 17.4 above. Therefore, smaller diameter stems will have a higher percentage of total fiber yield of total stem dry matter.

The correlation of fiber yield to stem diameter is weak (38%) but does suggest that as stems increase in diameter, the fiber yield increases see Graph 17.5

The correlation between fiber yield and plant density is also weak (-44%) and negative suggesting that as stems decrease in number fiber yields should increase. This relationship was established from cuts 1, 2 3 & 4 in field 1 for Unico-B

The correlation of fiber yield to stem diameter is weak (38%) but does suggest that as stems increase in diameter, the fiber yield increases Graph 17.5 below.

The correlation of fiber yield to stem diameter is weak (38%) but does suggest that as stems increase in diameter, the fiber yield increases Graph 17.5 above.

The correlation between fiber yield and plant density is also weak (-44%) and negative suggesting that as stems decrease in number fiber yields should increase. This relationship was established from cuts 1, 2 3 & 4 in field 1 for Unico-B

Based on 17 ½ M² plots Graph 17.6 below. Less dense stands should yield more from fiber due to thicker and longer stems.

Correlation of Fiber Yield (Kg/Ha) to Plant Density/M²

Based on 17 ½ M² plots Graph 17.6 above. Less dense stands should yield more from fiber due to thicker and longer stems.

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The percent of tops of plants in relation to total fiber yield decreases as stem diameter increases (-98% correlation) and stem length increases (-94% correlation). Graphs 17.7 and 17.8 below.

Correlation Between % Top of Total Fiber Yield and Stem Diameter (mm)

The percent of tops of plants in relation to total fiber yield decreases as stem diameter increases (-98% correlation) and stem length increases (-94% correlation). Graphs 17.7 above and 17.8 below.

Correlation Between % Top of Total Yield and Stem Length

The percent of tops of plants in relation to total fiber yield decreases as stem diameter increases (-98% correlation) and stem length increases (-94% correlation). Graphs 17.7 and 17.8 above.

Total plant yields (calculated from ½ M² harvest samples) were 17.12, 19.98, 11.82 and 12.02 t/ha for Unico-B field 1, Kompolti field 2, Kompolti field 3 and Unico-B Tillsonburg (field 4), respectively. The Brookston clay (field 3) and tobacco sand yields (field 4) were 67 and 57% of the field 1 and field 2 yields Graph 18.1 below.

Total plant yields (calculated from ½ M² harvest samples) were 17.12, 19.98, 11.82 and 12.02 t/ha for Unico-B field 1, Kompolti field 2, Kompolti field 3 and Unico-B Tillsonburg (field 4), respectively. The Brookston clay (field 3) and tobacco sand yields (field 4) were 67 and 57% of the field 1 and field 2 yields Graph 18.1 above.

The data for percent biomass composition of the above plant for tops, leaves and stems graph 18.2 below was obtained for Unico-B in field 1, Kompolti in field 2, Kompolti in field 3 and Unico-B from Tillsonburg - Clyde loam, Clyde loam, Brookston clay and tobacco sand soil types, respectively. There was very little variation in percentage composition for variety and soil type. The top portion was 13%, leaf = 20% and stem was 67% of the total above ground plant biomass with roots - tops = 11%, leaves = 15%, roots = 15% and stems = 59%.

Percentage of Total Biomass Weight

The data for percent biomass composition of the above plant for tops, leaves and stems graph 18.2 above was obtained for Unico-B in field 1, Kompolti in field 2, Kompolti in field 3 and Unico-B from Tillsonburg - Clyde loam, Clyde loam, Brookston clay and tobacco sand soil types, respectively. There was very little variation in percentage composition for variety and soil type. The top portion was 13%, leaf = 20% and stem was 67% of the total above ground plant biomass with roots - tops = 11%, leaves = 15%, roots = 15% and stems = 59%.

The yield of stems for fiber and hurds is significantly higher on Clyde loam soil than Brookston clay and tobacco sand (about 60% of Clyde loam soil types).

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Fiber yield was obtained for Unico-B at 62 (cut 1), 70 (cut 2), 74 (cut 3) and 84 days (cut 4) after seeding. The yield in kg/ha increased as plants matured - 2220, 2100, 2740 and 3360, respectively, from early to late cut. The hurd yields were 4420, 4120, 5000 and 6480 kg/ha, respectively, from early to late cut Graph 19.1 below. Cut 4 yielded 620 kg/ha more fiber than cut 3 (10 days earlier). Cut 3 yielded 640 kg/ha more than cut 2 - 4 days earlier than 3rd cut.

Fiber Yield at Four Cut Intervals

Fiber yield was obtained for Unico-B at 62 (cut 1), 70 (cut 2), 74 (cut 3) and 84 days (cut 4) after seeding. The yield in kg/ha increased as plants matured - 2220, 2100, 2740 and 3360, respectively, from early to late cut. The hurd yields were 4420, 4120, 5000 and 6480 kg/ha, respectively, from early to late cut Graph 19.1 above. Cut 4 yielded 620 kg/ha more fiber than cut 3 (10 days earlier). Cut 3 yielded 640 kg/ha more than cut 2 - 4 days earlier than 3rd cut.

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*Industrial-Hemp has no psychoactive properties following definition of the European Economic Community (EEC); THC content is less than 0.3%. In general, low THC-seed varieties without psychoactive properties are those that have a THC content of less than 1%. (See also No-THC Hemp-seed.) THC= Delta-9 TetraHydroCannabinol.

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