Agricultural Chemistry Assessment

Which of the following is considered a primary nutrient for plant growth?

• Calcium

• Magnesium

• Nitrogen

• Iron

Which of the following is a micronutrient essential for plants?

• Phosphorus

• Potassium

• Manganese

• Calcium

Ammonium nitrate is primarily used as:

• A phosphorus source

• A potassium source

• A nitrogen source

• A calcium source

What is the main difference between potassium nitrate and potassium chloride?

• Potassium nitrate contains nitrogen, while potassium chloride does not.

• Potassium chloride is more soluble in water than potassium nitrate.

• Potassium nitrate provides phosphorus, while potassium chloride does not.

• Potassium nitrate is used for its calcium content.

Complex fertilizers are characterized by

• The presence of multiple nutrient sources mixed together.

• A uniform ratio of all three primary nutrients.

• The combination of organic and inorganic materials.

• The specific addition of micronutrients.

Which of the following best describes the difference between fertilizers and manures?

• Fertilizers improve soil structure, while manures provide nutrients.

• Fertilizers are nutrients only, while manures provide nutrients and improve soil structure.

• Manures are applied before planting, while fertilizers are applied after planting.

• Fertilizers are organic, while manures are inorganic.

What distinguishes aerobic processes from anaerobic processes in manure management?

• Aerobic processes require air (oxygen), while anaerobic processes do not.

• Anaerobic processes produce more heat than aerobic processes.

• Aerobic processes produce methane, while anaerobic processes produce carbon dioxide.

• Anaerobic processes are faster than aerobic processes.

Which of the following is an example of a bulky organic manure?

• Urea

• Superphosphate

• Farm yard manure

• Ammonium nitrate

Which process involves the conversion of fresh manure into a more stable form through microbial activity?

• Composting

• Fermentation

• Liquid treatment

• Aerobic digestion

Fish manure is beneficial for plants because it

• Contains high levels of potassium.

• Is a source of both macronutrients and micronutrients?

• Is primarily used to improve soil texture.

• Is a synthetic fertilizer.