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1、helpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals. Organicfarmer
2、salsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekndofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheat
3、orcornthatneedrichandfertilesoil.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfro
4、mcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth. Anearlyfarmerpioneer SomepeoplethoughtJ
5、iaSixiewasaluckyman.Hehadworkedfortheemperorandwhenhegotold,hewasabletogohishometowntorelax.JiaSixie,however,hadotherplans.HehadalwaysbeeninterestedinagricultureandintendedtodosomethingtomakeChinesefarmingevenbetter. JiaSixielivedinthesixcenturyAD.Hewa
6、sborninYiduinShandongprovinceandworkedinGaoyang,whichisalsoinShangdong.Asherodethroughthecountrysideonhisjourneysforhisworkhelookedoutatthefields.Someofthemweregreenerandhadmorecropsthanothers.Somecowsandsheeplookedhealthierthanotherstoo.Hewaslostintho
7、ugh.Whatcouldafarmerdotogetgoodcropsfromhisfields?Surelytheremustberulesthatwouldhelpthem.Hethoughthecouldusehisknowledgetofindoutthebestwaysforfarmerstogrowcropsandthenwriteabooktohelpthem.Indoingsohecollectedinformationfromfarmerswhodidwell,studiedit
8、anddidexperimentstofindthebestway. Forexample,hestudiedwaysofkeepingseedsandadvisedfarmerstochooseseed-headswhichhadthebestcolor.Thenhetoldthemtohangthemtodryallwinter.Thenextspringtheseedsshouldbeknockedoutoftheirseed-headsandplanted.H
