pleas Describe one of the following weed control methods: chemical, biological, cultural, mechanical.

Chemical method for weed control is an effective method.

Explanation:

Chemical method for weed control is an effective method for controlling of weeds in the field. In this method, chemicals are used to control the growth of weeds in the field. The weedicide chemicals only effects the weeds in the field because they are specific to certain plants. 2,4- D, Butachlor, Anilophos, Pretilachlor and Pendimethalin are the examples of weedicides. This method is very effective in controlling weeds which leads to increase in the productivity of crops.

a time line cause it goes from 685 to 978

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.