存在自然障碍与人为破坏是中低产田低产的主要原因。
Both natural and artificial factors contribute to low and middle yield lands.
由此表明，中低产田深度开发具有良好的经济效益和生态效益。
Thus it proved that deeply-exploitation of middle - and low-yield field possessed better economic and ecological profit.
鲁西北地区是黄淮海平原中低产田渍涝洼地的主要分布区之一。
The low-lying saline-alkali wetland is one of main type of low yield fields in Huang-Huai-Hai Plain.
阿勒泰地区中低产田分布广，面积大，成因复杂，在新疆有较好的代表性。
The meso low yield land in Altay Prefecture is characterized by extensive distributing, large area, multiple types, and complicated formation causes, and has a good representativeness in Xinjiang.
并以山西省为例计算取得了较好的效果，为山西省中低产田的划分提供了科学依据。
It gets good results on Shanxi province and provides scientific basis for the division of Shanxi medium-low yield fields.
作者对镇安县中低产田的改造进行了调查研究，东分析了该县出现中低产田的原因。
The authors surveyed the transformation of the intermediate and low yielding farmland, and analysed the causes of occurence of the intermediate and low yielding farmlands in Zhenan County.
农业是国民经济的基础，农业综合开发中低产田改造着力提高粮食的综合生产能力。
The agriculture is the base of national economy. The agriculture synthesize development reform construction of the middle-low yielding farmland is focused on increase grain production.
农业综合开发的重点是改造中低产田，对于低洼易涝地区是除涝治碱，健全排灌系统。
It is important for agricultural synthetic exploitation to improve the poor yield, do away with the flood and alkali of low and stagnant field and perfect the draining and irrigating system.
加大土地开发整理复垦力度，搞好中低产田改造，提高耕地质量，建设一批高标准农田。
We will increase efforts to develop, improve and reclaim land, upgrade low - and medium-yield farmland, improve the productivity of farmland and develop farm plots that meet high standards.
在方正、肇源重点开展中低产田的土地流转及旱改水工程，使自有土地资源成为打造东方香米的基地。
Meanwhile, the company emphasizes on land transfer of medium and low yield fields and dryland-to-paddy soil project at Fangzheng and Zhaoyuan, to form a base of Orient Rice with its own land resource.
在重盐碱地经过冲洗、肥力很低，一般作物不能生长的条件下生长较好，可作为改良盐碱地和中低产田的先锋作物。
It can grow well in heavy saline and pool land. It is an ideal crop that can not only improve saline-alkaline soil, but also be used as forage for animals and fish.
到2000年，中国计划改造中低产田1400万公顷，力争到2030年使现有6000万公顷中低产田全部得到改造。
China plans to upgrade 14 million ha of medium - and low-yield fields by 2000, with a target upgrading of 60 million ha of medium - and low-yield fields by 2030.
到2000年，中国计划改造中低产田1400万公顷，力争到2030年使现有6000万公顷中低产田全部得到改造。
China plans to upgrade 14 million ha of medium - and low-yield fields by 2000, with a target upgrading of 60 million ha of medium - and low-yield fields by 2030.
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