Dear all,

Fertilizers are the most important input in crop production

To determine the appropriate dose, type of fertilizer depends on proper ( plant available  nutrient concantration ) soil analysis

unfortunately,  were not developed ( selection) proper soil testing methods to different soil properties .

The method selected for a region are used for all over the different regions ecological use , thus this  fertilizer type  will not be

">economic and ecological

">For this reason,

">as a priority, appropriate soil testing methods for different soil ( and climatic ) conditions should be selected (extaraction method, availability index)