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Challenge Details
SOIL SCIENCE #2
Questions
15
Full Marks
15
Negative
0.25
Duration
15 min
Solutions & Explanations
15 topic group(s) · Review all correct answers
1
Which one of the following is an example of positive interaction?
A Lime x Phosphorus
B Molybdenum x Phosphorus
C Phosphorus x Sulphur
D Sodium x Potassium
E Calcium x Magnesium
Explanation
Phosphorus and sulphur often exhibit positive interaction, where adequate sulphur improves phosphorus utilization and crop response.
2
Which fertilizer has the highest risk of fire or explosion?
A Aqua ammonia
B Ammonium nitrate
C Potassium nitrate
D Ammonium chloride
E Calcium ammonium nitrate
Explanation
Ammonium nitrate is a strong oxidizing fertilizer and poses a significant fire and explosion hazard under certain conditions.
3
Podzolization is the process of accumulation of
A Silica
B Iron and aluminium oxides
C Calcium carbonate
D Calcium sulphate
E Organic matter
Explanation
Podzolization involves leaching of iron and aluminium compounds from the upper horizon and their illuviation into the B-horizon, leaving silica concentrated in the eluvial (A) horizon.
4
Which rock is an extrusive (volcanic) igneous rock?
A Gabbro
B Diorite
C Basalt
D Monzonite
E Granite
Explanation
Basalt is an extrusive igneous rock formed by rapid cooling of lava at the Earth's surface.
5
Who proposed that water was the principal nourishment of plants?
A Pietro de Crescenzi
B J.B. Helmont
C Francis Bacon
D Jethro Tull
E Aristotle
Explanation
Francis Bacon proposed that water was the principal nourishment of plants. This early concept was later replaced by the modern theory of mineral nutrition.
6
In which country is most of the nitrogen for crop production obtained through biological nitrogen fixation by legumes?
A India
B USA
C Japan
D New Zealand
E Brazil
Explanation
New Zealand agriculture relies heavily on legume-based biological nitrogen fixation, particularly in pasture systems.
7
Among primary minerals, which is the most resistant to weathering?
A Quartz
B Olivine
C Albite
D Gypsum
E Muscovite
Explanation
Quartz is the most resistant common primary mineral to chemical weathering because of its stable crystal structure.
8
Which element is considered the energy currency for plants?
A N
B P
C K
D Mo
E S
Explanation
Phosphorus is a component of ATP and other energy-rich compounds; therefore it is called the energy currency element of plants.
9
Which humus fraction is lightest in colour?
A Fulvic acid
B Humic acid
C Humin
D None of these
E Hymatomelanic acid
Explanation
Fulvic acid is yellow to light brown in colour, making it the lightest fraction of humus.
10
Specific heat is highest in
A Sand
B Silt
C Clay
D Humus
E Water
Explanation
Water has a specific heat of about 1.0 cal/g degC, higher than sand, silt, clay, or humus. Soils with high water content therefore warm up and cool down more slowly than dry soils.
11
Calcium hydroxide has a calcium carbonate equivalent (CCE) of
A 179%
B 136%
C 109%
D 100%
E 125%
Explanation
Calcium hydroxide [Ca(OH)2] has a neutralizing value of approximately 136%, making it more effective than pure calcium carbonate on an equal weight basis.
12
Which of the following soils generally has poor physical condition?
A Saline
B Sodic
C Saline-alkali
D None of these
E Peaty soil
Explanation
Sodic soils have poor structure, low infiltration and poor permeability because of excess exchangeable sodium.
13
One acre of soil to a depth of 6 inches weighs approximately
A 2.25 x 10^5 kg
B 2 x 10^6 kg
C 2 x 10^6 lb
D 2.25 x 10^6 lb
E 1 x 10^6 kg
Explanation
An acre-furrow slice (6-inch depth) weighs approximately 2 million pounds (about 907,000 kg).
14
The vertical section of a soil showing all horizons is called
A Horizons
B Solum
C Profile
D A soil
E Pedon
Explanation
A soil profile is the vertical section of soil that displays all genetic horizons from the surface to the parent material.
15
The anion exchange capacity (AEC) increases as soil pH
A Increase
B Decreases
C First increases then decreases
D Remains unaffected
E Increases only above pH 8
Explanation
Anion exchange capacity increases as soil pH decreases because more positive charges develop on variable-charge minerals.
Global Rankings
Hall of Fame
27 July 2026
Kavitha T
8.75
2m 15s Chandu Gowda
8.00
3m 36s Saniya Masoom
5.50
3m 26s #4 
Siya Verma
5.00
3m 21s #5 
Pavitra Hanumanthu
4.50
3m 24s #6 
Panuganti Bhanu
1.50
3m 07s Challenge Info
Date 27 July 2026
Subject General
Topic
Questions 15 MCQs
Negative 0.25 / wrong
Attempted 106+
About This Challenge
MCQs for IBPS SO 2026 27 Jul 2026
This AgriPrep Daily Challenge, held on 27 July 2026, tested aspirants on — a core topic under General — through 15 carefully curated MCQs following the exact IBPS SO 2026 exam pattern. Each question carries 1 mark with a negative marking of 0.25 marks per wrong attempt.
Daily challenge practice on AgriPrep.in mirrors the actual IBPS SO Prelims environment — time pressure, negative marking, and topic-specific depth — making it one of the most effective ways to build exam-ready knowledge in .
Why Matters
Exam Relevance for IBPS SO
- is a General topic and frequently tested in IBPS SO Prelims, often carrying 2–4 questions in past papers.
- Conceptual clarity in helps answer both direct and applied questions, which make up the majority of the paper.
- The 15 questions in this set cover diverse sub-angles of , ensuring comprehensive coverage rather than rote recall.
- Attempting this challenge daily builds topic-wise accuracy and reduces negative-marking risk on exam day.
How to Use This Page
Maximise Your Review Session
- Attempt first, review later. If the arena is still live, attempt the challenge before reading solutions — this builds genuine exam habit.
- Read every explanation. Even if you answered correctly, the explanation reveals deeper logic and connected concepts.
- Note your weak patterns. Track which option types you commonly confuse — most errors in follow predictable patterns.
- Check the leaderboard. Compare your score against top rankers to set a realistic target for the next challenge.
Frequently Asked
Questions About This Challenge
What is the correct answer for questions in IBPS SO July 2026?
Detailed correct answers and explanations for all 15 MCQs from the 27 July 2026 challenge are available on this page after 09:15 PM IST.
How many questions were asked on in the AgriPrep Daily Challenge on 27 Jul 2026?
15 multiple-choice questions on (General) were asked in the IBPS SO Daily Challenge on 27 July 2026.
When are results declared for the AgriPrep IBPS SO Daily Challenge?
Results and the full leaderboard are declared at 9:15 PM IST on the challenge day. Answer keys are released at 09:15 PM IST.
Is important for IBPS SO 2026?
falls under General and is a regularly tested topic in IBPS SO Prelims. Daily MCQ practice on AgriPrep.in builds both speed and accuracy.
Practice Daily. Rank Higher. Clear IBPS SO 2026.
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