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�, Land Conservation Division <br /> i <br /> i Dane County Land&Water Resources Department <br /> pal-tment <br /> II a5 <br /> "'s =' Patrick J.Sutter,County Conservationist <br /> Gary Trulson <br /> 2410 Thomas Ct <br /> Onalaska,WI 54650 <br /> April 10,2014 <br /> Dear Gary, <br /> Based upon our discussion when I met with you on April 3,2014,I developed the following options for your <br /> cropland. The alternatives were developed for the steepest part of the farm,the hill southeast of the farmstead,which <br /> is the most susceptible to erosion. Please review these with your operator. Also enclosed the Conservation Plan <br /> Map. The tolerable soil loss"T"is 5 ton/acre/year for the more erodible soil types on your farm. The planned soil <br /> loss needs to be at or below this value. The lower the soil loss is below the"T"value,the more soil is being retained <br /> on the field. The alternatives are based upon tillage and planting operations in a north to south direction which is <br /> across the slope. The first three alternatives are continuous corn grain. The last three alternatives are a corn-soybean <br /> rotation. The percent residue is left on top of the soil surface after planting. <br /> Soil Loss <br /> Option Rotation,Tillage,Residue* (Tons/Ac/Yrl <br /> A Continuous Corn grain,continuous fall chisel plow with twisted shanks, <br /> spring tillage is 1 pass with a field cultivator in the spring leaving 30%residue 3.5 <br /> B Continuous Corn grain, 1 year fall chisel plow with twisted shanks,spring <br /> tillage is 1 pass with a field cultivator leaving 30%residue,followed by <br /> 2 consecutive years of no-till,leaving 80%residue 2.3 <br /> C Continuous Corn grain,continuous no-till,leaving 80%residue 0.3 <br /> D 1 year Corn grain,spring till soybean stubble 1 pass with a field cultivator leaving <br /> 30%residue followed by 1 year no-till Soybeans 15"row,leaving 70%residue 3.7 <br /> E 1 year no-till Corn grain into soybean stubble,leaving 70%residue followed by <br /> 1 year soybeans 15"row,fall chisel plow cornstalks with twisted shanks,spring <br /> tillage is 1 pass with a field cultivator leaving 30%residue 3.4 <br /> D 1 year no-till Corn grain into soybean stubble,leaving 80%residue followed by <br /> 1 year no-till Soybeans 15"row,leaving 80%residue 0.7 <br /> We also discussed doing some slight shaping of a waterway.About 24 feet wide at the top and about 8 inches deep <br /> and a length of about 300 feet would be a sufficient. Seed the channel and side slopes. Seed with some oats and <br /> grass seed. If taller grasses are used,then you should mow the waterway once or twice a year. If shorter grasses are <br /> used,then maybe one mowing is all that is needed. Taller grasses typically have a deeper root system than shorter <br /> grasses. <br /> If there are other crop rotation and tillage options you want me to check on or have other questions,please contact <br /> me at 608-224-3741. Please let me know which option you have decided to follow. <br /> Sincerel , <br /> / ,es:eiti <br /> C Dies , <br /> Conservation Specialist <br /> Lyman F.Anderson Agriculture&Conservation Center <br /> 5201 Fen Oak Drive,Room 208,Madison,Wisconsin 53718-8812-PH:608/224-3730,FAX:608/224-3745 <br /> www.countyofdane.com/landconservation <br />