Show I r Checks Soil Losses I Good soil management pays dividends dividends dividends divi divi- in making heavy crops per acre building organic matter in the soil and at the same time checking SOIL TREATED WITH LIME PHOSPHATE b SOIL POTASH NOT TREATED t r J j i. i ii COlI M 04 A Ur CORAl M l. HA n 52 a 7 9 9 19 13 12 s 6 02 21 T TO OM PER ACRE 15 TONS rom OK PEU DER AC ACHE 2440 US OF NITROGEN 1980 1060 LBS OF NITROGEN LBS OF SOL 20 L Les or 0 wt OS ISO L WAIL AVAIL LB ley AVAIL ROTAS La AVAIL CALCIUM lM Les AvAIL CALCIUM erosion The results shown above summarize tests at the University of Illinois Elizabethtown experiment field since 1918 I Manure lime and phosphate made the difference between the two plots The soil was already richin richin rich richin in potash The heavy crops of clover alfalfa-clover and small grains protected the soH soli from beating rains The soil of the treated plot with its 16 tons of organic organic organic or or- ganic matter per acre could soak up more water faster than the soil of the untreated plot with only five tons Less water was left to run oil off and carry soil with it For erosion control on longer slopes a crop rotation that includes more years in soil protecting crops such as legume grass mixtures is advised Full fields on a 12 per cent slope such as was in hi this field would need a rotation of corn winter grain and two or three years of legume legume- grass mixtures for best results Contour Con tour farming strip cropping and terracing would help too to slow slowdown slowdown slowdown down the water so that more would have a chance to soak into the ground |