关于农业地貌条件评价的研究

在农业资源、农业区划与国土整治的研究中,研究农业地貌条件的评价,是必不可少的基础作之一.本文讨论了农业地貌条件评价的内容和方法.

A STUDY ON THE AGRICULTURAL EVALUATION OF GEOMORPHOLOGICAL FEATURES

At present, for the development of agricultural production and for the modernization of cultivation, it is necessary to investigate the land resources by planning for various districts and territory management in our country.In a natural region, varieties of patterns of landscape may be the main features that affect in some degree the distribution of different agricultural resources. Thus, the evaluation of geomorphological features is one of the fundamental roles in investigation, subdivision, and planning for the land resources of a region.First, land is the ground of agricultural production, and land may constitute various patterns of landscape which affect directly or indirectlty he trend of development and rational arrangement of planting.Secondly, agricultural production in any area is affected not only by the landform of that place, but also by its areal composition and the elements of landscape, such as its elevation slope, and orientation of its surface mineral composition of the.ground as well as the recent geomorphological processes that lead to redistribution of energy received from solar radiation, moisture from the air,and the dispoacement of matters which control the balance of ecology of crop.Therefore, it is necessary to find out the following geomorphological evluation of agricultural production that concerns with landforms.1,To evaluate the geomorphological patterns and their areal composition with respect to production.2,To analyse and evaluare the following elements, (a) Its elevation above sea-level, (b) its slope, (c) Its orientation, (d) The substance of the land surface, (e) The recent geomorphological processes.Thirdly,five items of geomorphological work are expected to do for agricultural production.(a) Geomorphological investigation and mapping, (b) Orientation observation, (c) Conservation of soil with respect to geomorphological work (d) water control project and irrigation with respect to geomorphological work (e) Ecological balance with respect to geomorphological work.Finally, the authors suggest it is necessary to consider both the natural environments and social conditions of a given area comprehensively in order to make a scientific conclusion for the agricultural arrangement and production from its geomorphological features, so that it may approach the aim for full and reasonable use of the land resources.