简介：Itisofpracticalsignificanceforthedecision-makingoncountryfoodsecurityandfarmlandprotectiontoanalyzetheconversionmarginsforthemajorusesofagriculturallandandtheirvariations.Basedonthepaneldataofwheat,corn,vegetable,fruit,andforestsproductionsfrom520investigatedfarmerhouseholdsof13investigatedvillagesinShandongProvincefrom2003to2009,andusingCobb-Douglasproductionfunction,therevenueconversionmarginscanbeobtainedseparately,betweendifferentgrain-crops(wheat,corn)anddifferentnon-graincrops(vegetable,fruit,forests),andtheconversionrelationshipbetweengrowinggrain(wheat,corn)andgoingoutfornon-farmwork.Theresultsshowthatfrom2003to2009,growingwheatandcornaremoreeconomicallyandreasonablyforfarmers,comparedwithgrowingvegetable,butgrowingwheatandcornarebecominglesseconomicallyandlessreasonablydaybyday,comparedwithplantingforests.Moreover,theconversionmarginbetweenwheatandfruitshowsobviousscissorsdifference.Justfrom2007,farmers'growingfruitbecameeconomicallyandreasonably,butuntil2009,comparedwithgoingouttoworkafterabandoningfarm8land,growingwheathadnoeconomicrationality.From2003to2009,farmers'growingcornismoreprofitablethangrowingfruitandgoingoutfornon-farmworkafterabandoningfarmland.Thesubsidiesforwheatandcornhaveincreasedfarmers'comparativeincomefromfoodproductionremarkably,butthesubsidiescannotchangethegeneraltendencythatfarmerstransformfood(wheat,corn)productionintonon-food(especiallyforests)production.Therevenuedifferencebetweengrowingwheat,cornandvegetableandgrowingfruitandforestsisbeingpulledceaselesslybigger,andthetendencythatfarmerstransformwheat,cornandvegetablegrowinglandsintofruitandforestsgrowinglandshasbecomeincreasinglyapparent.

简介：Urbanizationisoneofthedrivingforcesforthelandusechangeintypeandstructure,anditsprominenteffectistoconvertrurallandtourbanland.ThispapertakesShan-dongProvinceasanexampletoanalyzethecurrentsituationofthemutualconversionbetweentheurbanandruralareasfromtheaspectsofthestructureoflanduse,thedecreasingtendencyofthecultivatedland,thechangesoflanduseinurbanandruralresidentialareas.Itpointsoutthatcultivatedlandisconvertedtoresidentialarealand,industrialand/orminingarealand.Therelationshipbetweentheurbanarealandandthecultivatedlandismoredirect;meanwhile,thechangesofruralresidentialarealagbehindobviously.Thedecreaseofthecultivatedlandandthedeclineofsoilqualitywillbethetwodifficultproblemsintheprocessofurbanization.

简介：Rural-urbanlandconversionisauniversalphenomenonintherapidprocessofeconomicdevelopmentandurbangrowth.Thewelfareoffarmerswholosttheirfarmlandattractedawidespreadconcernwithinthesocietyandacademia.However,furtherresearchaboutdifferentiatedpoliciesaccordingtothecharacteristicsofdifferentfarmergroupsisstillneedtobeconducted.Thisarticledividestheland-lostfarmersintothreeagegroups:youngerthan45,45-65,andmorethan65.Itproposesawelfareindexsystemincludingeightfunctionalareasbasedondifferentagegroupsofaffectedfarmers,takingfourdistrictsofWuhanCityascasestudyarea.Fuzzymathematicsmethodisusedtoderivetheaggregatedwelfareeffectindex.Ouranalysisshowthattheoverallwelfarelevelsofland-lostfarmersofallagegroupsdeclined,butwithavaryingdegree,withthelevelofwelfareinthosefarmerswhoare45-65yearsold,youngerthan45yearsold,andolderthan65yearsolddecreasedby18.7%,16.6%,and12.7%,respectively.Thedirectionanddegreeofeffectsonthefunctionalactivityindexvariesamongdifferentgroups.Economicconditions,livingenvironment,health,andsocialparticipationofallagegroupsdecreasewhilesocialsecurityandhousingconditionsincrease.Ontheotherhand,developmentopportunities,socialcommunication,andleisurehavedifferentchangingdirectionsindifferentagestages.Theseresultscallfordifferentiatedandtailor-madecompensationpoliciesforland-lostfarmers,towardsimprovingthewelfarelevelsofallfarmersandreducethedisparityamongthem.