Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society Vol. 16—1962 - NorthEastern Weed Science Society

08.06.2015 Views

338 Figure 2. The effect of particle size and degree of hopper filling (~ full. \ full and Full) on the output of two lawn spreaders. ,... .... Ql Ql .... U"\ ,... Ql '" ~ 600 ! j, I : 500 450 ~ 400 I I-~ ~--,.- ! \ I I -_._.'-. I i ._..-- I I sPREADER1 I -----.,~. I I I I I I I I I ! I I I I I I I I I I I I ; ~I 1\* FI i \ \ \ F* % IF t I I I I I ; , I 550i I ,-1--"1 SPREADER2 35 r I I I \J % F*I 30o;._.-L._,._ __L __ ..L 15/30 1-1 II I ---I ~ %*1F I ; _....L-_ 1L. !. 24/48 -1--1, I I I I I \* % i F , I I ........._--~._._,._-,.._------- Particle Size * Indicates this column is significantly different from .. 1.8 "", .. 1.__ 1. __ 30/60

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:: ,,'

338<br />

Figure 2. The effect of particle size and degree of hopper filling<br />

(~ full. \ full and Full) on the output of two lawn spreaders.<br />

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24/48<br />

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........._--~._._,._-,.._-------<br />

Particle Size<br />

* Indicates this column is significantly different from<br />

.. 1.8 "", .. 1.__ 1. __<br />

30/60

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