Questions & Answers
Browse all 18 questions from the
Advanced Agriculture Concepts study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the primary biological process that allows leguminous plants to fix atmospheric nitrogen into a usable form for themselves and other plants?
-
A
Photosynthesis
-
B
Respiration
-
C
Nitrification
-
D
Symbiotic nitrogen fixation by Rhizobium bacteria
2
In precision agriculture, what technology is most commonly used to create detailed maps of field variability for targeted fertilizer or pesticide application?
-
A
Spectroscopy
-
B
GPS and GIS
-
C
Drones with thermal imaging
-
D
Soil moisture sensors
3
Which soil horizon is characterized by the accumulation of leached minerals like clay, iron oxides, and aluminum, often appearing lighter in colour?
-
A
O horizon (organic matter)
-
B
A horizon (topsoil)
-
C
B horizon (subsoil or illuvial layer)
-
D
C horizon (parent material)
4
Hydroponics is a method of growing plants without soil. What essential nutrient is often omitted or significantly reduced in hydroponic nutrient solutions because it is readily available in dissolved oxygen?
-
A
Potassium
-
B
Nitrogen
-
C
Phosphorus
-
D
Carbon
5
The Green Revolution, beginning in the mid-20th century, significantly increased global agricultural production. What was a key technological innovation associated with it?
-
A
Genetically modified organisms (GMOs)
-
B
Development of high-yield crop varieties
-
C
Widespread adoption of no-till farming
-
D
Introduction of synthetic fertilizers
6
What is the term for the practice of cultivating crops and raising livestock on the same land simultaneously, aiming for a more integrated and sustainable system?
-
A
Monoculture
-
B
Crop rotation
-
C
Polyculture
-
D
Intercropping
7
Which type of pesticide is specifically designed to target and kill fungi that cause plant diseases?
-
A
Herbicide
-
B
Insecticide
-
C
Fungicide
-
D
Rodenticide
8
The Cantareira Water System, one of the largest urban water supply systems in the world, faces significant challenges due to agricultural runoff. What is a major pollutant from agriculture that can contribute to eutrophication of water bodies?
-
A
Heavy metals
-
B
Sediments
-
C
Nitrates and phosphates
-
D
Pesticides
9
What is the primary role of mycorrhizal fungi in the soil ecosystem regarding plant nutrition?
-
A
Decomposing organic matter
-
B
Fixing atmospheric nitrogen
-
C
Enhancing nutrient uptake (especially phosphorus) by plant roots
-
D
Protecting plants from soil-borne pathogens
10
Integrated Pest Management (IPM) is a sustainable approach to managing pests. Which of the following is a core principle of IPM?
-
A
Exclusive reliance on chemical pesticides
-
B
Using a combination of biological, cultural, and chemical tactics
-
C
Prioritizing synthetic fertilizers
-
D
Eliminating all insect populations
11
What is the specific term for the process of applying a beneficial microorganism to a plant or soil to enhance plant growth and health?
-
A
Biopesticide
-
B
Biofertilizer
-
C
Bioremediation
-
D
Biotechnology
12
Silage is a type of fermented fodder used as animal feed. What is the primary objective of the ensiling process?
-
A
To dry out the forage completely
-
B
To preserve forage by converting sugars into lactic acid
-
C
To increase the protein content
-
D
To remove all moisture
13
What is the primary difference between conventional tillage and conservation tillage (e.g., no-till or minimum till)?
-
A
Conventional tillage uses more water.
-
B
Conservation tillage leaves more crop residue on the soil surface.
-
C
Conventional tillage is more effective at weed control.
-
D
Conservation tillage requires heavier machinery.
14
The Bt gene, commonly used in genetically modified crops, confers resistance to certain insects. What is the source of this gene?
-
A
A bacterium
-
B
A virus
-
C
A fungus
-
D
Another plant species
15
What does the term 'agroforestry' describe?
-
A
The science of soil composition
-
B
The integration of trees and shrubs into farming systems
-
C
The study of insect behavior in agriculture
-
D
The management of water resources for irrigation
16
Which of the following is a primary function of earthworms in agricultural soils?
-
A
To suppress weed growth
-
B
To aerate the soil and improve its structure
-
C
To directly provide nitrogen to plant roots
-
D
To break down complex organic matter into simple sugars
17
What is the main challenge posed by soil salinization in agriculture?
-
A
Increased soil fertility
-
B
Reduced water availability for plant uptake
-
C
Enhanced nutrient leaching
-
D
Promoted microbial activity
18
What is the primary mechanism by which drip irrigation conserves water compared to flood irrigation?
-
A
It increases evaporation rates.
-
B
It delivers water directly to the plant roots, minimizing runoff and evaporation.
-
C
It requires a higher flow rate.
-
D
It saturates the entire soil profile evenly.
