lacustrine plain meaning in English

湖成平原

The elementary idea of the reference units method can be described as follows : firstly , by the setting of double series of reference units , we can control the highest and lowest land quality class of each village or town ; secondly , the class of the arable land will be get through the contrast between the arable land with the reference unit which has been selected in the same area , the difference in quality is the key factor to classify the land . the results show , 87 . 6 % of the lands from i to iii distribute on alluvial and lacustrine plains , where the associated soils are mainly grey fulvo - aquic and calcareous concretions black ones . and 61 . 4 % of them from iv to vi distribute on slightly rolling parts with mainly yellow - cinnamon soil developed from the diluvial and slope deposits
分等结果表明：卧龙区等的耕地中，有87 . 6分布在冲积、湖积平原区，主要土壤类型是在河流冲积物上发育形成的灰潮土、在湖相沉积物上发育形成的砂姜黑土；等耕地中，有61 . 4分布在垄岗区，主要土壤类型是洪坡积物上发育形成的黄褐土：而、等耕地集中分布在丘陵区，主要土壤类型是残坡积物上发育形成的粗骨性黄褐土，等别结果分布总体上体现了不同地貌类型、土壤条件下耕地质量的差异。