Dear Wendy What Sridhar has said is true that you can use other similar cultivar for your study. But I would like to bring in your knowledge that the Genotype coefficients are not always same and they change depending upon different ecological regions and adulteration of cultivars. There was a big discussion on this DSSAT LISTserver and it was mentioned by the Model developer that these cultivars may change from one place to other. Best thing that you can do is, develop your own coefficients. There are two methods to develop genotype coefficients one is using Gencal software and other is iterative adjustment (tuning) of coefficients for similar cultivars. This you can do even with two years data set and with 3-4 treatments. One of student in our department is doing work on same aspects. So if you want to share the data we can generate genotype coefficients for you. With best wishes Ajeet ------------------------------------------------ Dr Ajeet Singh Nain Department of Agrometeorology, Indira Gandhi Agricultural University, Krishaknagar, Raipur- 492 006 Chhattisgarh, India Ph: +91 771 2442557(O) Fax: +91 771 2442557(O) Mobile: +91 9425510954 ------------------------------------------------ Dear >From: Sridhar Gummadi <[log in to unmask]> >Reply-To: DSSAT - Crop Models and Applications <[log in to unmask]> >To: [log in to unmask] >Subject: Re: FW: Choosing a soybean cultivate and genetic coefficients >Date: Wed, 18 May 2005 09:09:35 +0530 > >Dear Wendy, > The best option you have is to find out the cultivate whose >genetic coefficients are pre-determined,and having the same >phenological characteristics as DT84. Else if you have 3-4 >years experimental data of Dt84 then also u can work out the >genetic coefficients using GenCal. > >With bes regards >Sridhar Gummadi. > >Sridhar Gummadi >SRF Agrometeorology, >Central Research Institute for Dryland Agriculture (CRIDA), >Hyderabad, A.P. >Ph: 98489 59494 _________________________________________________________________ Claim your space online! http://www.msn.co.in/spaces Share your world for free!