The relationship between climate and agriculture is very close; perhaps agriculture is the most significant activity regarding climate conditions. The climate factor is one of the most influential natural factors in determining the types of crops, as it determines the areas that can be cultivated with certain crops, including the wheat crop, which is the subject of the study. This study aims to study (the biothermal areas suitable for wheat cultivation and production in Iraq) that determine the geography of the applied climate. To clarify the biothermal areas suitable for wheat cultivation and production in Iraq, including the use of statistical equations in order to reach accurate and precise statistical results. The study also dealt with statistical analysis, the most crucial step that follows scientific research. Two methods were used to measure the statistical relationship: correlation and regression. Our study relied on the correlation coefficient, regression coefficient and coefficient of determination in measuring and estimating the relationship, its nature, and the level of influence between the selected study variables, which are the average productivity and salinity ratio according to units.