For a given block size, replication, and number of treatments, it is well known that a balanced incomplete block design, if one exists, is of maximum efficiency. We take the case of an even number of ...

Even when a parameter set (v, k, λ) satisfies the necessary conditions for the existence of a Balanced Incomplete Block (BIB) design, the actual design may not exist or its existence may be unknown.

DURING the course of recent work at the West African Cacao Research Institute, it became necessary to evaluate the products of small-scale fermentations of different types of cacao. Hitherto, samples ...