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Use of CROPGRO-soybean to simulate biomass and grain yield of soybean (Glycine max L.) in different planting dates

Research Paper | February 1, 2014

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Farzad Paknejad, Mohammad Nabi Ilkaee, Ebrahim Amiri, Mohsen Zavareh, Mohammad Reza Ardakani, Ali Kashani, Seied Mehdi Mirtaheri

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J. Bio. Env. Sci.4( 2), 9-16, February 2014


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In order to investigation of CROPGRO-Soybean model under four sowing date management in some of growth unlimited cultivars of soybean in Karaj, this experiment carry out as a randomized complete block design in split plot arrangement with four replications in 2010. Treatments were different planting date 19 May, 29 May, 9 Jun, 19 Jun as main plot and four growth limited cultivars of soybean (Wiliams and Zan) as sub plot. Result showed that variety dimension of RMSE for biomass had 356.41-1207.33. Also variety dimension of Wilmot coefficient (d) calculated between 0.898-0.989. The Wiliams cv in planting date 19 May with RMSE= 356.41 kg/ha and d=0.989 have been highest of model coefficient efficiency. In all of treatments variety dimension of R2 curve 1:1 measured and predicted rates, equal to 0.855-0.988 and correlation coefficient at (p< 1%) was significant .The variety dimension of RMSE for grain yield all of the treatments had 151.94-880.66 kg/ha. Also variety dimension of d coefficient calculated between 0.505-880.66 kg/ha.


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Use of CROPGRO-soybean to simulate biomass and grain yield of soybean (Glycine max L.) in different planting dates

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