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<br />";r;F.1(lr{~:J~~1r;:jhw <br /> <br />I <br /> <br />J <br />I <br /> <br />Table 2: General comparison of grasses <br /> Drought Dfseaso Insect Heat Cold Growth <br />Typ. Tolerance Resistance Resistance Tolerance Tolerance Rat. <br />Cool Season Grasses <br />Kentucky medium medium medium fair excellent medium <br />bluegrass <br />Perennial medium fair fair fair good fast <br />ryegrass <br />An. good good good poor excellent slow <br />fescue <br />Tall good good excellent medium fair fast* <br />fescue <br />Warm Season Grasses <br />Zoysia- excellent good good excellent medium slow <br />grass <br />Bermuda excellent fair good excellent poor fast <br />grass <br />Centipede poor good good good very poor slow <br />grass <br />St. Augustine fair medium medium good very poor fast <br />grass <br />Prairie Grass <br />Buffalo- excellent fair good good good slow <br />grass <br />* except for dwarf varieties which are medium to slow-growing <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />. <br /> <br />I <br /> <br />Figure 2: lower anatomy of the grass plant <br />(adopted from Schultz 1989) <br /> <br /> <br />STOLON <br /> <br />~... <br /> <br />, ( <br /> <br />Grasscycling-Lerting Clippings Lie <br /> <br />Grass is unusual in [hat it does not grow from th~ tip <br />but from the crown, near the soil line (see Figure 2). <br />Mowing cuts off the oldest part of the plant. thus the <br />plant can' tolerate repeat~d cropping. Traditional <br />lawncare practices call for faking and removing clip- <br />pings. which were thought 10 promote thatch and <br />disease. In fact. leaving clippings on the lawn is bcneti- <br />ciat, so long ~lS the Inwn is frequently 1110'W~U. Clip- <br />pings provide nutrients and moisture. Res~archcrs at <br />lhe University of Conneclicut Agricultural St:Hion <br />met..! mdioactive nitrogen to tr:u:k the f:llC of applit:d <br />nutrients when clippings are recycleu. They founJ that <br />within a week, most of the nitrogen rmllllhl~ dippings <br />was incorporaled into new gra::-:s growlh. After tlm:c <br />yt':lr:->, nearly HO'rr! of the :lpplicd nilfl)gcn had 11('(:11 <br />n:wrnctl to the lawn Ihrntl~h Ihe dipping:, lSdnllll. <br />Il)~N). ThL; ROlbh: Instilult' Rl.:'sl'an:h Ccma riHll1d <br />that an a~rc of c1ipril1~s pnwides an an..r:\~t: of 235 <br />pOtllllls or nitrogen ;wd 77 pound_" Ilf plh1sphnrus cad\ <br />YL':lr (M~ycr [905). Clippin~s als"l n.'I\ll"l1 Hwislllf..: In <br />(hL' gr;v.;s, which helps pnl1Ccl :Igainsl dfl)lI~lll: :md <br />ellcit/Ill, \~l1ich hdps kCl']1 lllL' snil 11'1)111 ~l'11111':': tllll <br />acid. <br /> <br />~l.D~ <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br /> <br />I <br />