The factors influencing the size and shape of exptl. field plots (area of exptl. lot, soil types, trial objective, no. of replicates, and degree of accuracy and homogeneity of the exptl. material) for the execution of field expt. are discussed.

Als basis voor de planvorming in het kader van projectvoorbereiding dient een groot aantal weg-, verkeers- en wegenbouwkundige kenmerken te worden gekwantificeerd.

Looks at the allocation of resources to livestock research in Africa. Assesses the role of agricultural research and its value to national governments. Investigates the appropriate criteria to use for decision making by comparing three kinds of decision-making models.