~~6. what are five limiting factors that would control the population density of weeds

The following five limiting factors would control the population density of weeds;

1.       Supply and nutrients in the soil

2.       Presence/Absence of growth-restricting substances such as pesticides

3.       The soil aeration and soil structure

4.       Moisture content in the soil.

5.       Biotic factors such as disease and pests

6.       Quality, intensity and duration of light

Explanation:

Weeds are all species that are born without human assistance, sporadically appear in the soil, starting to compete for light, space and nutrients and undermine the development of planned cultivation. In addition, weeds tend to spread quickly and quantitatively, competing for space in their fields.

Before establishing an economically viable crop in an area, weed management needs to be done. They must be removed and management must be done so that they do not grow back. For this reason, it is important to know what are the factors that limit weed growth. These factors are:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.