当前日趋加重的农田杂草危害，已严重制约种植业的发展。为摸清本地农田主要杂草种类、数量及分布，揭示农田杂草危害加重的原因，探索一条科学防除的途径，我们用三年时间进行定点跟踪调查，现将调查结果报道如下。１不同农作物的主要杂草种类１．１旱茬麦田主要有麦仁珠... The current aggravating harms of farmland weeds have severely restricted the development of planting industry. To find out the main types of weeds in the local farmland, their numbers and their distribution, and to reveal the reasons why weeds in the farmland are aggravated, we should explore a way of scientific prevention and control. We will carry out fixed-point tracking surveys in three years. The findings are reported as follows. 1 The main weed species of different crops 1.1 Drought wheat field mainly wheat kernel beads ...