plant growth and distribution(unit 3)

Question 1

positive human effect on plant growth

Answer 1

correct soil ph
optimum watering
correct nutrients present

Question 2

negative human effect on plant growth

Answer 2

picking wildfires

removing hedges and trees

Question 3

human effects on plant distribution

Answer 3

sowing of crops means fields with only one type of plant
trampling can cause unusual or more widespread distribution patterns due to seeds being carried on the bottom of the shoe

Question 4

what soil ph do plants grow best at

Answer 4

a ph between 4.5 and 7.5

Question 5

what does acidic soil mean

Answer 5

acidic soil can mean there is a deficiency in necessary minerals, such as iron and manganese

Question 6

why is soil aeration necessary

Answer 6

it is necessary to allow sufficient oxygen to get to the plant and for carbon dioxide to be removed
toxins also form where there is little aeration, such as hydrogen sulphide gas