Its history dates back to thousands of years. The oldest tree is dated back to 7000BC, the Romans called the walnuts Juglans regia, which means 'Jupiter's royal acorn'. If history is to be looked ...

Probably the largest concentration recorded is in the endocarp of the walnut, Juglans regia, which contains between 2 and 3 per cent of the fresh weight. The smallest concentration recorded is ...