Control of ryegrass with pre-emergent herbicides

To compare the effect of different pre-emergent herbicides applied pre sowing and post sowing on wheatestablishment and ryegrass control and to specifically improve the control of ryegrass in the crop row.本数据集旨在对比不同芽前除草剂（pre-emergent herbicides）分别于播前与播后施用时，对小麦出苗建植及黑麦草防除效果的影响，并针对性提升作物种植行内黑麦草的防除效果。