Crop Insurance Today August 2016 - 12
Research on soybeans at the Prosper Research Farm showing 100 percent node removal at
the R-1 stage and the control plants.
Table 12.
Stages
R-1
R-1 Chart
R-3
R-3 Chart
R-1
R-1 Chart
R-3
R-3 Chart
Defoliation
25%
50%
75%
100%
15
5
47
16
45
45
93
33
21
17
43
20
49
40
84
50
75%
100%
15
21
41
29
77
38
99
95
Indeterminate (MG 4.7) Loss %
6
1
12
4
16
3
24
8
Determinate (MG 5.4) Loss %
14
0
9
3
19
11
27
12
25%
50%
Table 13.
Stages
V-3
V-3 Chart
R-1
R-1 Chart
Node Removal
Loss %
6
9
2
11
4
14
19
18
Canola research in Saskatoon, Saskatchewan Canada.
12
AUGUST2016
ies. This area of the country has historically
been where determinate soybeans are grown,
but there has been a trend to start growing an
earlier maturing indeterminate variety. Other
research shows a trend of greater amounts of
loss associated with defoliation damage occurring during the early to mid-reproductive
stages (R1 and R3) of development so NCIS
began its own research project to determine
if this was true or not. Two different varieties were used-a MG 4.7 indeterminate and
a MG 5.4 determinate variety were planted at
Newport. Defoliation was applied at 0, 25, 50,
75, and 100 percent at either R1 or R3 stage of
growth. The results are shown in Table 12. The
losses were significantly greater for the indeterminate MG 4.7 variety at the higher levels
of damage (75 and 100 percent at R1 and R3
stages than our current charts would suggest.
The determinant MG 5.4 variety also showed
higher losses at the higher damage levels (75
and 100 percent but only at the R3 stage.
SOYBEANSNorth Dakota
A trial was initiated in 2015 to study the
impact of simulated hail - plant cut-off/node
removal on the yield and percentage of loss of
"Natto" soybeans. "Natto" soybeans are a specialty type of soybeans grown for food use in
Asia and there were suggestions from adjusters
that these types of soybeans did not recover as
well as traditional soybeans after a hail event.
The trials were conducted at the Prosper research farm just west of Fargo. Node removal
treatments were applied at V-3 and R-1 growth
stages with removal levels of 25, 50, 75, and
100 percent. The first year average losses are
shown in Table 13. The losses for the 75 percent node removal treatment at R-1 stage, and
the 100 percent removal treatment at V-3, have
higher losses than our current charts suggest.
This is the first year of this trial, so we will
need further data to determine if this type of
specialty soybean is more susceptible to node
removal than traditional soybeans.
The NCIS research program could not
happen without the support of NCIS member
companies. For more than 90 years the research has provided the science behind the industry loss adjustment procedures. This provides company adjusters with the knowledge
they need to determine accurate losses, giving
farmers peace of mind knowing that their loss
has been adjusted accurately and fairly.
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