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rt. P{ + rr. P|' + r.. P, + !r. Pn + E? + r,.
Pr+rr. Pd + !r. Pu+!iPi
rr. p, + t!. P, + rr. Pq + r{, Ei + rr. P, + Pt
+ ri. P, + lnt P! + t. Pi
rhy - r.' Pr + rr. P! + !.. Po + !.. Pa + r.. Pr +
!..Pr+!d.Ps+lr+riPn
ri,y - rj. P, + .r. Pt + !d. Pe { r.. P, + 1.. Pr + tr
P,, + !d. E +r..Pb+P,
xhq6 r, l,r tb. .ybbo1 u66il !o! g.uotyplc
co!!€l.tlon co6ltlclent rln !o! path co6!!lcl6nt 1n tatis
ol p.ltlll r€gre66ion coolllclant and !, b, c' it, e, !,
q, h lnd I chdactqg und.r lDvestlgatton an.l ryr Etdila
for yt.ld ol 6@d @tton Fr plant.