agricultural tractor；farm tractor

Guidance for large scale agriculture tractor was the develop direction in current PA.

对大型农用拖拉机进行导航是目前精准农业的发展方向。

The agricultural application has become one of the most important ways for sewage sludge recycling.

城市污泥农用是城市污泥资源化利用的重要途径之一。

Now, land application of sewage sludge has become an important way for sewage sludge disposal duo to its lower cost and higher efficiency.

但是污泥中的重金属成为污泥土地利用的主要限制因素,因此,我们动态监测了北京市污泥养分和重金属含量,采用盆栽方法研究了污泥中重金属的植物有效性,并研究了大田模式下污泥施用对土壤环境和小麦重金属含量的影响,初步探讨了北京市污泥农用的肥料和环境效应。