analysis of parametric approaches in qualitative land suitability evaluation for irrigated wheat (triticum aestivum l.) cultivation at neyshabur plain

using parametric approaches for qualitative assessment of land suitability is a useful method for diagnosis of land capability and potential in optimum crop production. by using such methods will hope that to achieve sustainability in based on fao land evaluation frame works and the presented tables of soil and climate requirements for agronomic crops. we studied qualitative land suitability for irrigated wheat (triticum aestivum l.) at neyshabur plain. an interpolation function was used to map values to scores in terms of land qualities/characteristics for wheat cultivation and the evaluation was carried out according to parametric approaches of storie, square root and kalogirou. the interpolation technique by gis functions helped in managing the spatial data and visualizing the results. the land suitability degree for wheat at neyshabour plain by storie method ranged from 1.53–33.22, while square root method fluctuated from 1.35 to 38.72 corresponds to n2 to s3 classes. based on kalogirou method land degrees varied from 24.51 to 60.19 corresponds to n1 – s2 land suitability classes. our results indicated that the most important limiting factor for irrigated wheat is soil physical properties. it was demonstrated that using kalogirou method gives more reliable and realistic results compared to other parametric approaches.