In view of some unresolved key methodological problems (such as defining diagnostic criteria of evaluation factors, single factor evaluation and integrated evaluation of soil quality) in soil quality evaluation at present in China and being due to fuzziness in soil quality evaluation, this paper puts forward the idea and methods for establishing single factor evaluation and integrated evaluation models by applying fuzzy mathematics. The evaluation models are applied and verified with satisfactory results.
The paper mainly discussed the achievements of soil and fertilizer and environment science of Hebei province from 1949 in brief. The research included soil inventory, fertility supervision, the fertilizer theory and technology, evaluation of soil quality and environment protection. At the same time the author expected the most task and development direction of soil and fertilizer and environment science of Hebei province in new century.
The paper discussed the application of fuzzy mathematic s in integrated evaluation of soil quality of Hebei plain. By multi statistical an alysis,6 items of soil bulk density,organic matter,total N,etc.
To be useful, a method for assessing soil quality must be able to integrate many different kinds of data, allow evaluation of soil quality based on alternative uses or definitions and estimate soil quality for unsampled locations.