Examples Of Normal Spread Patterns - Boqballe EX Manual

EX(W)
Trend
Examples for NORMAL spread patterns.
Spread width
Quantity
OPTIMUM spread pattern
TILT ANGLE:
Gram
30
25
20
15
10
5
0
24 19
From the tramline in which you drive the spread pattern forms a "TRIANGLE", ensuring a correct overlap.
The fertiliser in this example is as a minimum spread to next tramline – often wider.
15,0%
10,0%
5,0%
0,0%
6 7 8 9 10 11
The variation coefficient (Vk) is an expression of the "quality" of the spread pattern.
In this example the VK is of optimum size at 18 metres – with a Vk of 2,9 %
The variation coefficient indicates the ability of the spreader to distribute the fertiliser
evenly over the field. If the spread width is either too large
– it will influence negatively the Vk and thus the fertiliser distribution.
overlap)
One of the big BOGBALLE strengths is that the 4-double overlap of the machine ensures a
good flexibility – say a minimum Vk – over a very very large spectrum.
(In this example from 6 to 21 metres)
This means in practice that the machine is able to absorb deviations in the distance of
tramlines, deviations in PTO speed and to a certain degree – deviations from tilt angle,
without influencing the distribution of the fertiliser (Vk).
As main rule the below scale is used internationally as evaluation basis:
Vk < 5 %
Vk > 5 %
Vk > 10 %
: 18 metres
: 250 Kg/Ha
+3°
Sprede- og overlapningskurve
Spread- and Overlap pattern
14 9
Variationskoefficient
Variation Coefficient
2,9%
12 13 14 15 16 17 18 19
.
< 10 %
< 15 %
Test with test trays
Tendency
Optimum overlap
M e te r
4 4
20 21 22 23 24 25 26 27
Afs tand m e lle m k ør e s por
Very good
Good
Acceptable
24
9 14
28 29 30 31 32 33 34 35
, or too small
(large overlap)
Spredekurve
Overlap 18m
19 24
36 37 38 39 40
(small