TeeJet LH 765 - Manual (Page 6)

LH 765 G RAIN LOSS MONITOR – O PERATORS MANUAL & F ITTING INSTRUCTION
6 LH A GRO
CALCULATION OF GRAIN LOSS
The figures in the following table state the number of seeds per running metre of
straw behind the combine harvester when the loss is 1% in a field where the yield
is 400 kg/ha.
Width of cut Barley Oats Wheat Rye
Foot Cm 25 seeds=1g 28 seeds=1g 21 seeds=1g 25 seeds=1g
100 100 112 84 100
6’ 180 180 201 161 180
8’ 240 240 268 201 240
8½’ 265 265 296 222 265
10’ 300 300 336 252 300
12’ 360 360 403 302 360
14’ 420 420 470 352 420
15’ 450 450 504 378 450
17’ 510 510 571 428 510
18’ 570 570 638 478 570
In the table we assume that the yield is 4000 kg/ha. Considerable deviation from
this requires correction.
Collect the lost seeds on a piece of canvas placed under the sieves. The length of
it in the driven direction must be known exactly.
Examples:
1.
Barley 12’ width of cut, 220 seeds (yield 4000 kg/ha).
220
Loss =
360
= 0,6%
2.
Barley 12’ width of cut, 220 seeds (yield 4800 kg/ha).
220 4000
Loss =
360
x
4800
= 0,5 %
3.
Wheat 8½’ width of cut, 200 seeds (yield 5000 kg/ha).
200 4000
Loss =
265
x
5000
= 0,6 %
Seeds that are lying on the field before the harvest shall of course not be included
in the calculation.