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Show Shelter Belt Idea IdeaMay ea eaa May a Be e Revived RevivedBecause RevivedBecause Because o of Drouth DrouthExperience rout routE routerience E Eerience Experience erience of Russia RussiaProves RussiaProves Proves Value of TreesE TreesFFORTS Trees TreesTT7FFORTS TT7FFORTS FFORTS to bring about a aresumption aresumption aJL- aJL aJLresumption EFFORTS E - ' resumption of planting in inthe inthe inthe the Great Grcat Plains shelterbelt shelterbeltarea shelterbeltarea shcltcrbeltarea area , suspended through the theaction theaction theaction action of the last congress , may maybe maybe maybe be made as a result of the pres pres- present pres- pres present present - - ent drouth , which is reemphasizing re-empha re empha re-empha- reemphasizing reemphasizing - - - - sizing the very great impor impor- importance importance importance - - tance ofevaporation of evaporation rates in a aland aland aland land where water often passes passesfrom passesfrom passesfrom from . earth c1rth earthi ' to air three times as asfast asfast asfast fast as it falls from air to earth . In this tlus connection the experIence experienceof of Russia , which WhlCh has extensive extenslve shel- shel shelter shel shelter - . ter belt plantmgs plantings in regions com corn- corn cornparable comparable . - parable to our West , . , may be of ofinterest ofinterest ofInterest interest . . Shelterbelts are an old oldstory oldstory oldstory story In 1n that country . They were begun extensively dur dur- during during . - ing 1ng the days of the czanst czarIst govern government . ment , and have been continued and andgreatly andgreatly andgreatly greatly enlarged Reduce Evaporation . V . Bodorov , chief cluef collaborator of ofthe ofthe ofthe the shelterbelt shelt.erbelt . department . , Insltute Insitutc Insltuteof Insitutcof Insitutcof of Forest Culture and Forest Meho Mello MehoratIon Melloration Melioration ratIon of the U . S S R , has made madea a quantitative study of the effects effectsof effectsof effectsof of shclterbelts shelterbelts on evaporation rates ratesof , ot of which a translation has been beenmade beenmade beenmade made for the Journal of Forestry Forestryby Forestryby Forestryby by T . Moskwichewa Moskwlchewn MoskwichewaIn MoskwlchewnIn In the steppe region , Mr Bodorovstates Bodorov Bodorovstates Bodorovstates states , the influence mfluence of shelterbelts shelterbeltsin shelterbeltsm m in reducing reducmg evaporation extends extendsover extendsover extendsover over a distance exceeding exceedmg 60 GO tImes tImesthe timesthe timesthe the height of the trees trces used , at wmd wind windvelocities windvelocities elocltIes velocities \ of about six sac miles an anhour anhour anhour hour . With ' " winds mds around twelve ID miles milesan milesan es esan an hour , the evaporation reducmg reducing reducmgeffect reducingeffect reducingeffect effect of the trees is felt at dis- dis distances dis distances . - tances more than a hundred tunes times tunestheir timestheir timestheir their height heightBuilt Built With "Windows Windows "Wmdows Wmdows " " . To take a concrete e example ample , a afity afifty afifty fity fifty ! foot high sheiterbelt shelterbelt of proper properdensity properdensity properdensity density would reduce evaporation in inIts inits inits Its lee to distances up to about a amile amile amile mile . Russian shelterbelts are built bUllt with with"wmdows with"windows with"windows withwindows "wmdows wmdows "windows windows " " m in them , , Mr . Bodorov Bodorovstates Bodorovstates Bodorovstates states . These are openings openmgs at ex- ex experImentally experimentally ex experimentally - perimentally determined deterrmned mtervals intervals mtervalsWIthout intervalsWithout intervalsWithout WIthout them , temperature differ cWIer- cWIer differ- cWIerences differences differences - ences on the leeward side slde would wouldtend wouldtend wouldtend tend to be too great . , and there therewould therewould therewould would also be a downflow downfiow of upper upperqnd upperand qnd nd drier masses of air . |