For weeds whose roots deepen more than the level of subsoil, they may be affected by this layer, for example, determined by height and growth, as well as limited to flower production and seeds.
Nofel Issa Sir, the depth of soil is determined the extension of roots of any crops including weeds. However, some of them are shallow rooted and some are deep rooted. No doubt, if any crop has extended their roots in course of moisture and nutrients. id not available these factors in reach of roots definitely affects growth and development
In case of weed some root having swallow root and some having deep depth root so soil matter for growing both plant and weeds. majorly 90% of weed are growing on subsoil and collect the nutrient from the subsoil,that's why competition occur in between plant and weeds. Subsoil is affected more by swallow root weeds.
Probably, this zone can be source of seed bank! The root system moves depending on various factors; moisture, fertility, age of the plant etc.
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