Vol. 16—1962 - NorthEastern Weed Science Society

Table 4. The effect of speed, p~~cle size and( d~ee of hopper filling on
the amount: ,of granul.q :.. !erial (in"SJlUl) ;da~ivered by Spreader 2*.
339
Part1c1e
Size
", ", 'Degree qf."Holner. ·rul1lless
'\fuli ; full Full
15/30
24/48
; :;. ~
414.3 be
,l..!!!!hj 13
>ti"- t
394.5 ..
" r:;f ..
369.0 /l(
409.8 b
450.3 cd
~l'1
30/60
1502.0 e
r:
434.~'b~
484.0 de
I,. ,
15/30:
24/48
30/~Q'
.r- 'j ~'~n ,'.
332.3 ab 309.3 a 342.3 abc
1""7 ,:
.-,;,,:~.8 d
.,
*' numbers follciWeCLby the same leiter at anyone speed !,­
are not significantly different from each other.
'-t' ,
The hopper levels again, d~_act in theltame manner for the two speeds.
The output of the full hopper was the highest at 2mph but the middle value at
3 mph. The, i-hopper level output ~a;s the lowest th~hout.,
S~;AtI~ CONCLUSIONS.:'
FOU1"'gl'anularapplicators ~:L"e~.r~qmparedundar~ndf.tions similar ~o '-"
thosewhtchwould. normally be en~t:ered. Thevarq.,ti,On in the amount 0#;.
granular material delivered by 2 .fi~ld applicat~:~cl ~ lawn spreaders W¥ '
measured;' the variables being ~~~d speed, partip'1,ci size and amount of,:
material in the hopper. " "" ' ,'.. . ',:,
For all applicators test;ed,~h,~, output wasin.y~rllely,proportionalto the
speed of themacbine. The various"particle shes );.~~~ddifferently as~~
spell.,d,',and,hO,,P,pe,r content change,ii,"',: ',LAt, so the vat",,ia:ti~tf,' W,J.,",thinan"Y,one par, t,i,~,la,size
was not consist ant as speed and, h~p»~r content vl¢i~~. ,,'J;he amount or ~~F~al
in the hopp~r, hac!a significant; ,not' necessari1YJi~ar.effect (In thewe~~t
of granules, deUvered. '., ' ' ' ';c
There was considerable variation between spreaders as to their reaction
to a change in the speed. hopper content or particle size. In one ap~~£oebor'
the output was inversely proportional to hopper content, in anothe~ itwa~
directlyprCilpOfU()nal. There waS':also significantmili.tlon in the daliv~ry
rate Df ~el1eft ~d ~lght side.,~f ~he fieldappllc~ors. For the la~rn8preaders
there was considerable variability ia the amount of :~erhl delivered trdmone
run to another at a constant speed, particle size and hopper content. This was
true t~ a lesser degree w~th the field applicators.
..";~::l::
,,'