1111J~lllfllm1lm:1J1J E m11302111654

~1~1J1111>~111J(ln1fl. ';1Jl~fllll>~lflfl1~U~fl) ';1J~ 'IflJ 10440 1uVi 30 ll.fl. 2555

I~ ~~ 1J~ri ~lll fllll> fll>1J> ~liJUl'lll fll> rll~1'l~l'1fl11Un. Ufl1> l1I'l1Ulfll> lfl'lll'1 >mUllU11l'l>'Il;J n~Vl~li'l~~ ~

~ Q 0d • Q

1Ul'lflll1UI'11>~U ~ml11>mu

o l~~ l1JHIVI~l>lUl 0 l~~ l1J>fl.Jllilufll> 0" l~~ l1J>fll'l>l1J

~~illlllfl. '1Jlri~l~ flllm1'~ flftl11,.r,.r~~llljfl m lJll!\'1

'l1'1J1m'H9J

I

(d. 1J"l-­

""..IT", &""~

2S GU I. 2555

1'I'Ul'hh~Lij'Ue.I~ ,hUml'ULI'I~~\iii'iln1~Ln~llI~ 'lJlJ?i~LlJm'l1~n1~th~Lii'Ue.I~n1~rill'J'VIlJllI. . ~

fI11lJTI'Un1~~IilI'Uln1~Ln~IlI~1lI1lJLL'U'lLI'I~~\iii'il'l'ilJLVlm lJ1LVllJ1offth~ bl'J'llU 'i\'1'U'l'U \" L<1lJ ~

~'U6th~Lil'Ue.I~

?i'l'Uth~ Lij'Ue.I~ LLe.I'U~IilI'Uln1~ Ln~m

b'VI ~ il'wVI 0-\"<1:""",-c;i\"",\",0-\"<1:""",-0bG1« b'VI~m~ 0-\"<1:"""'-0<1:0,",

E-Mail prog-eva@oae.go.th

fl11tJ1~!iJuNa

fl11rl1tJrl8~fl11lJ~U fl1111~U 1011!01:t~1 'U

<t! '" tpm 'i:::I'J.J'UN~ CENTRE FOR PROJECT AND PROGRAMME EVALUATION

tt1'Wf)-31'U!ftnl~ n;)f)1'1m\l\l1 'j OFFICE OF AGRICULTURAL ECONOMICS <

fl'i:::'Yl':i 1-31f)\l\l1'j 1I~:::i:Y'l'lf)'j W MINISTRY OF AGRICULTURE AND COOPERATIVES

Itlfli:Yl'jl.ijiJlft'j}j~nllfll'Hfl\lm 1~"IJfi 126 AGRICULTURAL ECONOMICS RESEARCH NO. 126

~-3'l'l1f1'J.J 2555 AUGUST 2012

<V

iYl'jUqJ

'HU1

llfl~V6 '\I

fi1\11 fI

ffl~1J\y -:I

"n~,jtl!~l~l{j ~

ffnoUt1/~l'n:lr.l'U1f1 DJ

fflioUt1/fIlYl t1J

, ... 0

lltltJ 1 'lJ tllll 1

1.1 fl111Jl~'U1J1'\J6~ ifl'i.:lf11~

1.2 1~flU;~ff.:ltl'lJ6.:lifl'i~f11'j• 1.3 Ail1l'nJlllU~~.:ltJU'j~1J1W'\J{).:l 2im.:lf11'j

1.4 1iif11'j~chlU'U{j1'Uifl Hf11~ 4 I ClodQ.l

1.5 'H'U1tJ.:l1'W't1'jtJr.l~')ftltJ 5

1.6 1h~ 111'b'tr~fI1~y;h~:: '~i''l.J'\JD-:I ifl'j{jf11'j 5

.,; 4 ~4 t1' ~ 'UntJ 2 1::1'UrJ'Ul1Hll1 1~lSJllNil 7

2.1 fl111J"hflf\!'\J{).:lf11 "JU 'j ::1ii'Uj:.m 7

"'.1 '" .1'"2.2 1~~lJ'j::ff~fI'lJ{J~f11"JlJ~::A1J'UH~ 8

2.3 '\J6tJA'lJ~f11'Ju'J::tih.JH~ 8 ... Q

2.4 f11'j~'j1tl16f)ff1'j Ll'U1f1~ll~~'Ylq1:l~ 9

2.5 ~f11'jU:i:::lij'UH~ 18 ..... , , 'jIo> .1'"

2.6 tI.n: i tJ')f'U'V1f11~11\l:: m'l.J~lf1f11:ilJ'j::A1JUH~ 24

. 4 ~tI'UntJ 3 ~H'lnT1' 1::lJJU 25

3.1 H~f11"Jlh::tihJf11'jtJ~'Hl'.i ~~f11'.i 25

.1 ... ~ .., • 'jI 13.2 HClf11'.ilJ'j::UJ'UlJ\l\ltJU1t'lJ1~11JflHf11"i 29

3.3 H~f11'jU'j::tijw·m1~~1f)im-:lf11'j 40

3.4 HClf11'jU'.i::Aij'UHClm::'t1'l.J'illf) 1m-:lf11':i' 46

-:I

1.J"~ 4 Ultl Uty111 U"':: '811TU8UlA:: 72

4.1 ~t'l.l 72

4.2 ,j'tm'ltJ fllt'\..!:: 78

1.J11Wl11nnl 80

tnflNlAlfl 82 , .

o cv d'" ..et fl fl1~,:jm:::11~1,:jtfl~~~,Uft:::ffl'Tfl'HIJ 'Vl 356/2550 83

\I tl1 i,:jt!tJVeJllJ 1~fl1~\I~~f1111JtJlfl~lJl1ft:;~9i1I:Ul')ftJlJ'Vllf'll1J\l i''lfty1~fY~~!f1 ~'YHll-ntJ,:j 87

tI .d m:::'VI'j1,:jlml~'jllft:::ffl'Tfl'HU (fY~YLflll.) 'VI 112550

f1 tl1i,:jfjtJveJl'U1tJfl1 ~~ ')~fl111JtJ1mJ Ullft::'Vr\liJtJ l'lftJ tJl11111J'l.l i''l1ty1IfY'Illif1 ~'Yit:l1-ntl,:j 91

.. ~ nr~nn.Jm'!mmt'l~trHnHU (ft'tJw.mJ.) n 212550

,:j 'j:::l!jtJlJ ff1Unnu 'l.l"~ m::'Y1'j l,:jtflllt;l'j Uft::ffl'TmW11~ltJfl1'I'oti~ltJt~tJ~~l'T'lfU 95

r tI 4/ '_/ tI " lm-1fl1'It1tJmmV~ltJ1J11'lfty'lf11'U1tJ Vtfl'. 255 I

~ ~ flW enfl n ffUtJff'4lJ,:jlJ 'l.l~:; 111 tlJ 'Vr\liJ U1Uft::'l.li'lJ,j t ~fJtJVtfl~ V,htJ'l.l11'lfqJ'lf11,j'l'U 103

U 'I tl{jtJ1HhUfl,:j 1tJlI~~m::'Y1'i l,:jlfl~t;l 'Illft:: ~11 mw11~1tJfl1'i'~~lm~lJ'J~l'T'4tJ 106

1flHfl1~':fu61f1~f),j1tJ,j~1'lftY'lf11,j'l'U ('inj'lJ~ 2) 'W.fY.2551

'If r·H1fll'j ltJ~tltJmJtH'j 1tl~ltJ'IJ f),:j~l'lhrlJfl1'If)lJ~1Jl'T"~~ lml1fll111fhJ'l.lU,j~ ~lll'\..!fHrJtJ 109

~ltl~-.'I111~

d f Q,/ ~

C)f ~ .fll'Yit!UtlU~ft::~-1l'T1~ 114

OJ 'l.l~::1J1"fl1~f1~nn1Ju~m:;)n!1~ 161