natural, renewable, biodegradable and low pollution hemp fibers are an alternative to trees xylem and artificial fibers. in this study, xylem and bast fiber properties of six iranian hemp populations including length, width, wall thickness, lumen width and wall index were measured and compared. to this purpose, collected population seeds from different parts of iran were nursed in a controlled ...

We propose a set of basic properties that any reasonable segregation index should have. We then fully characterize the class of segregation indices that satisfy these basic properties. We show that every such index has a particular simple form. Finally, we show that with one rarely used exception, each index defined in the literature violates one or more of our basic properties. Journal of Econ...