Soil Science (Ag Foundations)

This term indicates the relative content of particles of various sizes, such as sand, silt and clay in the soil.

• texture

• type

• pH

• nutrient content

Which particle is the most porous and allows for the most water to travel between them?

• silt

• sand

• clay

• loam

This refers to a type of water that can escape from the soil.

• capillary

• hygroscopic

• flowing

• gravitational

What type of soil water forms as a very thin film surrounding soil particles and is generally not available to the plant? It is bound so tightly to the soil by adhesion properties that very little of it can be taken up by plant roots.

• capillary

• gravitational

• hygroscopic

• flowing

What type of soil water is used by plants?

• hygroscopic

• capillary

• gravitational

• all types of soil water

Which of the following is not a primary nutrient required for plant growth?

• Calcium

• Phosphorus

• Potassium

• Nitrogen

Which of the following are the macronutrients that can be absorbed atmospherically?

• Phosphorus, Nitrogen and Carbon

• Carbon, Nitrogen, Potassium

• Nitrogen, Oxygen and Carbon

• Carbon, Oxygen, Hydrogen

Which element makes plant green?

• Potassium

• Nitrogen

• Phosphorus

• Magnesium

Phosphate deficiency is seen by what coloring of the plant?

• purple

• bluish

• brown

• yellow

Which primary plant nutrient promotes strong root growth in young seedlings?

• Phosphorus

• Potassium

• Nitrogen

• Iron