INTENSIFICATION OF TREE FRUIT PRODUCTION: CURRENT CONSTRAINTS, RELEVANT RESEARCH AND AN ALTERNATIVE SYSTEM STRATEGY FOR THE 1980s
In spite of current over-production of many fruit crops there are strong arguments for further intensification. Many management costs, e.g. land preparation (including fumigation), irrigation and frost protection are area-dependent and the most suitable land is expensive and becoming less available because of requirements for urban development including recreational use. There is, therefore, urgent need to understand why the very successful single-row HDP systems have not been universally accepted for apples, what are the constraints on still further intensification of this crop and which are the key factors limiting the development of HDP systems for other tree fruits. This knowledge should provide a framework for our research for the future.