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1、helpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals. Organicfarmersalsousemanyothe
2、rmethodstokeepthesoilfertile.Theyoftenchangethekndofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil
3、.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitintheground
4、tobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth. Anearlyfarmerpioneer SomepeoplethoughtJiaSixiewasaluckyman.Hehadworkedfortheemperorandwhenhegotold,hewa
5、sabletogohishometowntorelax.JiaSixie,however,hadotherplans.HehadalwaysbeeninterestedinagricultureandintendedtodosomethingtomakeChinesefarmingevenbetter. JiaSixielivedinthesixcenturyAD.HewasborninYiduinShandongprovinceandworkedinGaoyang,whichisalsoinShangdong.Asherodet
6、hroughthecountrysideonhisjourneysforhisworkhelookedoutatthefields.Someofthemweregreenerandhadmorecropsthanothers.Somecowsandsheeplookedhealthierthanotherstoo.Hewaslostinthough.Whatcouldafarmerdotogetgoodcropsfromhisfields?Surelytheremustberulesthatwouldhelpthem.Hethou
7、ghthecouldusehisknowledgetofindoutthebestwaysforfarmerstogrowcropsandthenwriteabooktohelpthem.Indoingsohecollectedinformationfromfarmerswhodidwell,studieditanddidexperimentstofindthebestway. Forexample,hestudiedwaysofkeepingseedsandadvisedfarmerstochooseseed-headswhic
8、hhadthebestcolor.Thenhetoldthemtohangthemtodryallwinter.Thenextspringtheseedsshouldbeknockedoutoftheirseed-headsandplanted.H
