Prediction of Wheat Biological Yield Using Geostatistics (Northern Darab)

The aim of the study is determination of the correlation between factors affecting in the wheat yield and preparing of yield mapping of wheat in north of Darab city. In order to determine the relationship between biological and grain yield with some of the important agronomic traits 60 samples in the north of Darab city was investigated. Parameters such as plant height, seed weight, harvest index, tiller number, latitude and longitude for each of the samples was measured. The results show that grain weight has highest correlation with the biological yield (0.97**). In this study, also using the Kriging (Gaussian models, spherical, circular and exponential models) and average inverse distance (IDW) maps of the biological yield and grain weight was determined. The results of the interpolation show that kriging method (Gaussian model) with a minimum error (RMSE=0.98 for biologic yield and RMSE=0.97 for grain weight) was the best model for preparation of these parameters in the study area. Also the results of biologic yield map show that areas locating in the North West of the study area were the highest yield.