Soil science

Question 1 of 10

The soil type with the largest particles and the poorest water-holding capacity is

Question 2 of 10

The washing down of nutrients beyond the reach of roots is

Question 3 of 10

The process by which soluble nutrients are washed down below the reach of plant roots is

Question 4 of 10

The best soil for most crops is

Question 5 of 10

The horizon of a soil profile richest in humus is the

Question 6 of 10

Which of the following is an organic manure?

Question 7 of 10

Earthworms improve soil mainly by

Question 8 of 10

The decayed remains of plants and animals in soil is

Question 9 of 10

Phosphorus is especially important in crops for

Question 10 of 10

The soil with the largest particles is