Paddy (Rice) Cultivation Quiz | Agriculture RS Rajput

Agronomy Mastery Quiz

Topic: Paddy (Rice) Cultivation | 20 High-Yield MCQs

Question 1

Which region is considered the center of origin for Rice (Oryza sativa)?

A) South America

B) India and Burma

C) Central Africa

D) Mediterranean

Check Correct Answer

Correct Answer: B) India and Burma
Scientists have suggested India and Burma as the primary center of origin.

Question 2

What is India's global rank in terms of Rice production?

A) First

B) Second

C) Third

D) Fourth

Check Correct Answer

Correct Answer: A) Second
India ranks 1st in production in 2025 updated, though it has the largest area under cultivation.

Question 3

Rice is classified as which type of plant based on photoperiod sensitivity?

A) Long Day Plant

B) Short Day Plant

C) Day Neutral Plant

D) Intermediate Plant

Check Correct Answer

Correct Answer: B) Short Day Plant
Rice typically requires short days for flowering, although many modern varieties are photo-insensitive.

Question 4

What is the optimum pH range for Rice cultivation?

A) 4.0 - 5.0

B) 5.5 - 6.5

C) 7.0 - 8.0

D) 8.5 - 9.0

Check Correct Answer

Correct Answer: B) 5.5 - 6.5
Rice prefers slightly acidic soils for optimum nutrient uptake.

Question 5

What is the recommended seed rate for Hybrid Rice?

A) 60 kg/ha

B) 40 kg/ha

C) 20 kg/ha

D) 8 kg/ha

Check Correct Answer

Correct Answer: C) 20 kg/ha
Hybrids require a much lower seed rate compared to traditional varieties.

Question 6

In the System of Rice Intensification (SRI), what is the recommended age of seedlings for transplanting?

A) 14 days

B) 21 days

C) 30 days

D) 45 days

Check Correct Answer

Correct Answer: A) 14 days
SRI utilizes very young seedlings (usually 2-leaf stage, around 14 days old).

Question 7

Which deficiency is responsible for 'Khaira' disease in rice?

A) Nitrogen

B) Phosphorus

C) Zinc

D) Iron

Check Correct Answer

Correct Answer: C) Zinc
Zinc Sulphate is applied to correct this common deficiency.

Question 8

Which bio-fertilizer is specifically associated with the rice ecosystem for Nitrogen fixation?

A) Rhizobium

B) Azolla

C) Azotobacter

D) VAM

Check Correct Answer

Correct Answer: B) Azolla
Azolla (a water fern) works in symbiosis with Blue Green Algae (BGA) to fix nitrogen in flooded rice fields.

Question 9

"Golden Rice" is genetically modified to be rich in which nutrient?

A) Protein

B) Vitamin A

C) Iron

D) Vitamin C

Check Correct Answer

Correct Answer: B) Vitamin A
It contains beta-carotene, a precursor to Vitamin A.

Question 10

Which of the following is a common pre-emergence herbicide used in rice?

A) Glyphosate

B) Butachlor

C) 2,4-D

D) Atrazine

Check Correct Answer

Correct Answer: B) Butachlor
Butachlor or Pretilachlor is applied on the 3rd day after sowing/transplanting.

Question 11

What is the seed rate requirement for the SRI method of cultivation?

A) 60 kg/ha

B) 25 kg/ha

C) 7-8 kg/ha

D) 2 kg/ha

Check Correct Answer

Correct Answer: C) 7-8 kg/ha
SRI drastically reduces seed requirement compared to conventional methods.

Question 12

Which stage is considered most critical for irrigation in rice?

A) Seedling stage

B) Panicle Initiation

C) Maturity

D) Tillering

Check Correct Answer

Correct Answer: B) Panicle Initiation
Panicle Initiation, Booting, and Flowering are the most critical moisture-sensitive stages.

Question 13

What is the optimum planting geometry (spacing) for Short Duration Rice?

A) 15 x 10 cm

B) 20 x 10 cm

C) 20 x 20 cm

D) 30 x 10 cm

Check Correct Answer

Correct Answer: A) 15 x 10 cm
Closer spacing is used for short duration varieties to maximize population.

Question 14

Bt Rice is genetically modified to provide resistance against which pest?

A) Rice Blast

B) Stem Borer

C) Brown Plant Hopper

D) Leaf Folder

Check Correct Answer

Correct Answer: B) Stem Borer
The Bacillus thuringiensis gene provides resistance against pests like the Stem Borer.

Question 15

The "Samba" season in Tamil Nadu generally corresponds to sowing in which month?

A) January

B) April

C) August

D) December

Check Correct Answer

Correct Answer: C) August
Samba is a major season with sowing typically in August.

Question 16

Which chemical is commonly used for seed treatment to prevent fungal diseases in rice?

A) Urea

B) Carbendazim

C) Potash

D) Malathion

Check Correct Answer

Correct Answer: B) Carbendazim
Seeds are treated with Carbendazim to protect against seed-borne pathogens.

Question 17

What is the standard N:P:K fertilizer recommendation per hectare for general rice cultivation?

A) 50:50:50

B) 80:40:20

C) 120:40:40

D) 200:100:100

Check Correct Answer

Correct Answer: C) 120:40:40
120 kg N, 40 kg P, and 40 kg K is the standard blanket recommendation.

Question 18

What is the harvest index sign for paddy?

A) 100% panicles turn brown

B) 80% panicles turn straw color

C) Leaves turn completely dry

D) 50% flowering

Check Correct Answer

Correct Answer: B) 80% panicles turn straw color
Harvesting is done when 80% of the panicles turn straw colored and grains are hard.

Question 19

SRI method uses which weeding implement to incorporate weeds into the soil?

A) Hand Hoe

B) Cono Weeder

C) Power Tiller

D) Spade

Check Correct Answer

Correct Answer: B) Cono Weeder
The Rotary or Cono Weeder is used to trample weeds into the mud, acting as green manure.

Question 20

How many seedlings per hill are recommended in the SRI method?

A) 1

B) 2-3

C) 4-5

D) Bunch planting

Check Correct Answer

Correct Answer: A) 1
SRI mandates planting a single seedling per hill to reduce competition and increase tillering.