AGRONOMY (Z;" ' - Higher Education Commission

Marquard and C.ndry 049) cond!.t d a *ri6 of 4P€nmentt on oil*d
hpe (Bt6in nry6 L) and EPorted that nibo8en aPPlicattont coNtstently
deEns€d oil but in@.sed Prolein co.bnls.
PirLkerton 0991) inv6tigaH the ctitical PhotPhotus
concentrano$ rn
oilsed B/6'd t4l,ae and a@i.!i!td 6 a@ bv nibo8 n ln 8ld hou*
expennenb, raF and 4wtard were Erown
in s.nd .t 7 rate. of B combined
fectonaly with 3 .ates of N suitabl. 3!mPl6 for tissu€ t6tinE wer€ the whole
3hoot of either sP€i6 .t .ny stage, or th€ youn86t fully exPanded leal of 'aF
and leave {-6 of nstard nt the r@tte stage ln whole shoots 'rlti'al levelt for
ea.h spdis declin€d with.8e. Ciitical laels for €d yield w$ sli8hdv hi8h4
A nutrient suPPly wit$ Ngh I and hiSh N redu@d the se€d oil 'oncenb'tion ot
Taylor a al (191) found thal iriSalim and N incred€d t"d md oil vield
of canoh AtB'd Aalru vdi Mmoo 4€d yield was in @sed t'y 100 and 200 kg
N/ha on th. iriSaled heatnenrs 5€.d oil conenbation ranged 6om 4641
wittout N !o 40.6% with 200lg N/ha and w6s invsely rclaH to saed N
concenbatio!, Altholth turtili4r N dcrcaed oil concntration it incrc'*d oil
yield/n2. N acMulation limited yteld of all beatnents, imPlyins a d*rea3e in
),ield/unit of N at the hiSher rates of t nilizr +Plidtion with 'ons'quenr
in rca* in s€ed N .oncenbation,
ch.uhan rf,l (192) stu.li€d the
EPoe of nPe lreid tqre to*adt
nibogen level and rcw sPtci^E dunng .6eld tial. He ob* ed that wh€n raPe
35