Recallthatundertherentalsharerestrictionahighertenantinputcosttendstoeabout,,itwilltendtowardthemaximizationofyieldvalueperacreoflandperperiodoftime.[6]Withthisreasoning,threetypesofcropsaddedatthemarginaredetectedunderthesharerestriction,"landmargin"asitisusedinlandeconomicsusuallyrefersto"arable",,thesemarginsincludehillslopesandbadlyerodedfields,,thecropchosenforthismarginallandwascitronella,awildperfumegrasswhichwasnowwidelyintroducedfororganizedcultivation.Asisshownintable5,thecropareaforcitronellaincreasedfrom2.36thousandhectaresin1948toapeakof16.87thousandhectaresin1951.[7]Inprefectureranking,theresponseincropareaincreaseisclearlymoresignificantfortheprefecturesingroupIthanforthoseingroupsIIandIII.Theyieldpercrophectareincreasedslightlyfrom1948to1949,butgenerallydeclinedrapidlyin1950and1951.Thelargedeclineincrophectareyieldafter1949asthecropareacontinuedtoincreasemaybeinterpretedastheresultofagradualuseoflesssuitablelandmarginsforcitronellacultivation,,,forexample,wherethetotalyieldin1949(5.06×10.4)wasonlyafractionlowerthanthatin1950(8.3×6.61).The64percentincreaseincropareain1950ledtoonlya4.3percentincreaseintotalyield,,thereisalsothepossibilityofrandomfluctuationsowingtoweather,,thefurtherdeclineinaveragecrophectareyieldin1951,withfurtherincreaseincroparea(hectare),(physical)landincreasedasaresultofincreasingcroparea(plantingrate),asisclearlythecasewhenwepare1948withanyofthefollowingthreeyears(table5),[8]theaverageproductoflandhadincreased(i.e.,shiftedupward).Thisimpliesthatthemarginalproductcurveofcultivatedlandalsoincreased,(cropareatimesthehectareyield)increasedsignificantlymoreinprefecturesofthehigherrankings(rankedaccordingtoproportionsoffarmsaffectedbythesharerestriction),,aswasclearlythecaseafter1949,themarginalyieldofincreasingtenantinputsincultivatingincrementalcrophectare(area),,,,butcontinuestogrowaloneaftertheinitialcropisharvested,.