resistances to learning-a reluctance to admit to areas of ignorance or the need to change habitual ways of doing things. Imagine, for example, the feelings of an experienced extension officer who attends a workshop on extension methods-or who is reading this manual on the subject! If he is being challenged to reconsider his own delivery methods, he may feel personally slighted and become defensive about the way he has grown accustomed to doing things. So, this condition becomes extremely important when the learner has already accumulated experience and competencies related to what he is being asked to learn--or unlearn. This, of course, is the situation you face in your dealings with farmers. They possess experience and skills which can be drawn on in a positive way. But there will always be the possibility that some farmers will become defensive and resistant if their existing practices seem threatened and regarded as inapplicable. In this respect, whether or not a farmer is prepared to accept extension messages will depend to a certain extent on the credibil- ity of the sender of the message. Again, this refers back to what was said in the previous chapter about your own standing in the eyes of the farmer-and the extent to which you can enlist the support of other high status figures in the community. Here, too, reference to practices that neighboring farmers are adopting will have a powerful influence Presentation It is unlikely that learning will be effective if it is not guided, if the learner is not sure about objectives-what the learning is designed to achieve-or if he does not have a clear picture of what he needs to know or be able to do. Of prime importance is that your presentation of information is accurate. If, for instance, when you are dealing with the treatment of grain before storing, you get the recommended chemical dosage wrong, then the consequences could be serious. The second general point is that what you say should be relevant to the occasion-the message should be a timely one (concerned with a particular farming activity that the farmers will soon be engaged in); and the message should be "tailored" to the needs and interests of the particular farmers you are addressing. There is, for example, no point in talking in detail about the treatment of grain for storage if the farmers have not even harvested. Or, it would be inappropriate to concentrate on large cribs if the farmers you are talking to grow