,wefindthemorefrequentchoiceofacrop(higherpercentageincreaseincroparea)whichtakesashortertimetogrow.Thispatternisparticularlyclearinparingitems1,9,13,,stem(item1)andleaf(item9)vegetablesgrowfasterthanfruit(item13)androot(item14),thegrowingtimeasacriterionofchoiceisalsoclearlyshownbyparingvegetablesofthesametype:forexample,amongthelistedrootvegetablesthehighestranked,radish(item4),isnotedasthefastestgrowing,whereasginger(item19)anddasheen(item20)are"notoriously"slow;amongfruitvegetablesthehighestranked,tomato(item6),perhapsgrowsthefastest;andamongstemvegetablesthelowestranked,waterconvolvulus(item17),isnotablyslowgrowing.[20]

Second,,forexample;bothcropsrequireroughlythesamegrowingtime(about95days).ButitisestimatedthatChinesecabbage(item2)requires354labordaysforthecultivationofoneacre,paredwith256labordaysforcabbage(item5).[21]

The"time"and"cost"criteriaofvegetablecropchoicecanberesolvedintoone:,andprovidedthatacropisgrown,,,giventhesamecostrequirementofcultivation,themarginalcropsmorefrequentlyaddedwerethosewhichrequiredashortertime,,theresultsofatendencytowardthemaximizationofgrosscropvalueratherthanthecropvaluenetofnonlandcosts.[1].See,forexample,ChengChen,RecordofTaiwanLandReform,chaps.1and2;JCRR,"JCRRAnnualReports,",,.2,however,themarketrentalpercentagedependsnotonlyonthefertilityoflandandthecostoffarming,,forourpresentpurposetheinitialrentalpercentageistherelevantmeasure.[2].SeePeterson,"EconomicStudyofLandUse."