The use of evaluation models for decision making: Application to the community anti-crime program

Evaluations are typically designed to provide useful information, including measures of program effectiveness. Although this information is intended to be useful, the general literature on evaluations suggests that instances in which evaluations are explicitly used for decision making are rare. This article discusses the use of decision-theoretic evaluation models, and their applicability in practice as well as in principle. A case study is presented from the evaluation of LEAA's Community Anti-Crime Program, in which a decision analysis based on a decision-theoretic evaluation model influenced a programmatic decision which arose during the conduct of the evaluation.     

小麦接种VA菌根及小麦根际联合固氮菌的研究

小麦接种VA菌根和小麦根际联合国氮菌处理有显著的增产效果,其产量分别比对照提高9.662％和6.01％,接种VA菌根加固氮菌的处理,产量此对照提高16.83％,接种VA菌根的处理分蘖成穗率高达61％,有效穗比对照提高了8.66％;接种固氮菌的处理,穗粒数比对照提高9.3％,各处理的干物质积累都优于对照。