Crop Insurance Today Third Quarter 2020 - 21

TABLE 11

Industrial Hemp Response
to Stand Reduction at
Langdon & Prosper
North Dakota (3 site average)
			Stand Reduction %
		
20	 40	60	 80
	 Plant Stage	
Loss%

	 3 Pairs of Leaves	7	 -3	 0	 10
	 7 Pairs of Leaves	0	 9	 7	 15
	 9 Pairs of Leaves	5	 6	 16	 24

two production states for this commodity. The
trial evaluates 25, 50, 75, and 90 percent stand
reduction at two planting populations (40,000
and 80,000 seeds/acre), and three growth stages: 5-leaf, boot, and soft dough. These growth
stages coincide with growing point differentiations of grain head development and grain
filling. The preliminary results (three years
in Kansas and two years in Texas) indicate
that the current stand reduction chart overestimates losses at the 5-leaf growth stage for
both plant populations (Table 10). Current
procedures count stand reduction losses at the
boot and dough stages on a 1-for-1 basis, but
this research indicates losses at the boot stage
are considerably less than 1-for-1 (Table 10).
Losses at the dough stage are greater than those
observed at the boot stage but are also less than
1-for-1 (Table 10).

Dr. Burton Johnson, North Dakota State University, checking the seed fill on industrial hemp stand
reduction trial.

INDUSTRIAL HEMP
North Dakota
NCIS initiated research in North Dakota in
2018 to study the effects of stand reduction on
seed production in industrial hemp. Industrial
hemp has many different uses including fiber,
seed for vegetable oil production, and production of cannabinoid (CBD) materials. Hemp
research has recently been allowed again as
a result of changes that occurred in the 2018
Farm Bill and the drug's reclassification by the
Drug Enforcement Agency. This research is
being conducted at Langdon and Prosper to
study the impact of stand reduction treatment
to a 'dioecious' variety at three different growth
stages. The growth stages are V3 (three pairs of
leaves), V7 (7 pairs of leaves), and V9 (9 pairs
of leaves). Stand reduction was done at 0, 20,
40, 60, and 80 percent and the results are shown
in Table 11.

This field of hemp on the left had 80 percent stand reduction applied at the V3 stage on July 1,
2019, and the field on the right is the stand reduction check plot. Photos were taken August 5.
CROPINSURANCE TODAY®

21



Crop Insurance Today Third Quarter 2020

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