Zoning Golestan Province in terms of ability and the wheat production gap by using the simulation model (SSM)

Wheat (Triticum Aestivum) as one of the most important agronomic crops has a special status in our country. Reducing the yield gap is one of the ways for raising the production. In this direction, the production rate and the wheat yield gap in Golestan province were analyzed by using the simulation model SSM – Wheat and GIS software. For this purpose, the managerial information of wheat farming and cultivation were collected based at the provincial level and with regards to the information of 25 weather station and the region soil information, the potential yield was simulated in the irrigated and rainfed conditions at the provincial level and then the potential yield zoning was performed in the GIS and then with regards to the farmer's production rate and real yield at the provincial level, the yield gap and the production one were also calculated in the irrigated and rainfed conditions. Results indicated that the yield average of irrigated and rainfed potential with regards to the figures and current agricultural methods are respectively 8/140 and 4/930 kilograms per hectare. Also, the potential production in the irrigated and rainfed conditions were concluded as and equal to 1/357 and 1/112 million tons (Total: 2/469 million tons). Results showed that in case of studying and removing the factors which may cause the yield gap in the said province, the wheat production can be increased from the current 926 thousand tons to 1/975 million tons.