Sugarbeet, sugar LRes plantpop 6.0 dmaxshoot 1 cbaflag 1 tgtyield 20 cbafact 1 cyrafact 1 hyldflag 5 hyldunits ton/ac hyldwater 82 hyconfact 4.465 idc 7 grf 1 ck 0.65 hui0 0.9 hmx 0.6 growdepth 0.025 rdmx 2 tbas 2.0 topt 21.0 thudf 0 dtm 145 thum 2300 frsx1 -5 frsx2 -15 frsy1 0.01 frsy2 0.95 verndel 0 bceff 35 a_lf 0.05 b_lf 0.935 c_lf 0.25 d_lf -0.06 a_rp 0.02 b_rp 0.9 c_rp 0.3537 d_rp 0.08 a_ht 0.2206 b_ht -0.066 ssaa 2 ssab 1 sla 20 huie 0.05 transf 0 diammax 0.6449227 storeinit 20.833334 mshoot 20.833334 leafstem 1.3 fshoot 0.01 leaf2stor 0 stem2stor 0 stor2stor 1 rbc 1 standdk 0.02 surfdk 0.02 burieddk 0.02 rootdk 0.02 stemnodk 0.2 stemdia 0.0050 thrddys 20 covfact 5.227942 resevapa -1.20379 resevapb 0.604887 yield_coefficient 0.06 residue_intercept 0.011208501 regrow_location 0 noparam3 0.0 noparam2 0.0 noparam1 0.0 crop_notes Data sources: Kropff, M.J. adn C.J.T. Spitters. 1992. An eco-physiological model for interspecific competition, applied to the influence of Chenopodium album L on sugar beet. I. Model description and parameterization. Weed Research, Volume 32, 437-450 Reference provided growth temperatures, partitioning curves, light extinction coefficient, specific leaf area, dry matter partitioning, and plant height. Data in the article also shows that the hard coded fibrous root partitioning does not properly account for sugar beet fibrous partitioning. The model partition to fibrous root is 0.4 at the season start, and 0.2 at season end. The article shows it starting at 0.2 and ending at 0.0 This should be compensated but would require significant model changes. Davidoff, B. and R. J. Hanks. 1989. Sugar beet production as influenced by limited irrigation. Irrigation Science, vol 10:1-17 Rooting depth inferred from water extraction data in the 1.8 to 2.4 meter depth. Doering, E. J. 1976. Sugarbeet Yield and Theoretical Photosynthesis in the Northern Great Plains. Journal of the American Society of Sugar Beet Technologists, vol 19, no 2, pp. 163-175 Noted that the Sugar Beet will give higher yields, and grow for a longer season, in Ft. Collins CO, and give lower yields and grow for a shorter season in Carrington North Dakota. It is probably not best modeled with a fixed heat unit total season sum. The article seems to imply that once it reaches the root filling stage, extending that stage results in increased yields. At present the model cannot handle that mode of growth. It is probably best handled by adjusting the season length to the location. As configured, longer seasons do give higher yields. This record was review and is now certified to grow in Clay Co. MN, and Lapeer Co. MN. Changing the soil texture in the runs causes considerable yield change. The MN runs were set to 20 ton/ac yields. The biomass eff factor was 33 and has been adjusted to 35. Calibration will likely need to be done in other locations MAS 10-2-07 Working with Jerry Griger, and Dr. Robert Lucas at MSU MI, we found the residue at harvest to be high on the current record. Data shows that 20 t/ac beets produce 2500 lbs/ac at harvest. I have adjusted the rate lower on this LRes version. MAS 10-2-08 crop_devnotes Enter dev notes here.