why there are differences in the content of date seed fruits (minerals, antioxidant, carb, fat, protien)

Order Description I DID ANALYSIS ON DATE SEED FRUIT FORM DIFFERENT VARIETIES AND COUNTRIES I WANT A RESEARCH ABOUT WHY THERE ARE DIFFERENCES IN MINERALS CONTENT AMONG THE DATE SEED COUNTRIES AND THE CONTENT OF CHO, FAT AND PROTIEN (IS IT BECAUSE FERTILIZATION? SOIL? WATER USED FOR PLANTS? THE REASONS.. NO NEED FOR CONCLUSION OF INTRODUCTION JUST WRITE THE REASON CLEARLY WRITE IN SIMPLE ENGLISH NOT COMPLICATED WORDS