Free Agronomy MCQs with Answers
312 Agronomy MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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312 questions · page 5 of 16
81. Radiation can be detected by the blankening of photographic film or by using___________________?
- A. Ratio autoanalyser
- B. Neutron probe
- C. GM counter
- D. Dosimeter
Explanation: A Geiger-Müller counter detects ionizing radiation by registering the electrical pulses produced in its gas-filled tube.
Correct answer: GM counter- A. 25%N & 23% P2O3
- B. 46%N & 23% P2O3
- C. None of the above
- D. 23%N & 23% P2O3
Explanation: Nitrophos is an NP complex fertilizer commonly formulated as 23% nitrogen and 23% phosphorus expressed as P₂O₅.
Correct answer: 23%N & 23% P2O3- A. NH3
- B. NH48CO2
- C. NH3 & CH4
- D. All the above
Explanation: Industrial urea is manufactured from ammonia and carbon dioxide under pressure, forming ammonium carbamate before dehydration to urea.
Correct answer: NH48CO2- A. C3 plant
- B. C2 plant
- C. C4 plant
- D. None of the aboveDownload Nature Guides
Explanation: Sugarcane uses the C4 pathway, which concentrates carbon dioxide around Rubisco and gives efficient photosynthesis under high temperature…
Correct answer: C4 plant- A. 23
- B. 35
- C. 45
- D. 21State & Local Government
Explanation: Ammonium sulphate, (NH₄)₂SO₄, contains about 21% nitrogen by mass, with the remainder mainly sulphur and oxygen.
Correct answer: 21State & Local Government- A. 0-50 cm
- B. 150-70 cm
- C. 70-80 cm
- D. None of the above
Explanation: Tundra regions are cold and generally dry, with mean annual precipitation commonly below 50 cm.
Correct answer: 0-50 cm- A. CO2 + H2O light O2 + (CH3O)
- B. CaCO3 + 2HCl CaCl2 H2O+CO3
- C. ((CH2O) + O2 CO2 + H2O)
- D. None of the above
Explanation: Photosynthesis uses carbon dioxide and water in the presence of light to form carbohydrate and release oxygen, represented generally as…
Correct answer: CO2 + H2O light O2 + (CH3O)- A. 0%
- B. 3%
- C. 5%
- D. 10%
Explanation: Plant nitrogen concentrations below about 3% of dry matter are commonly taken as deficient, although the critical value varies with crop…
Correct answer: 3%- A. Biurct (NH2CONH CONH2 H2O)
- B. Uric acid
- C. Diuret
- D. Both b & c
Explanation: When urea is heated, part of it condenses to form biuret, which can injure or inhibit sensitive crops, especially during foliar…
Correct answer: Biurct (NH2CONH CONH2 H2O)- A. 46%N & 18%P2O3
- B. 18% N & 46% P2O5
- C. 100%P2O3
- D. 50%P2O3
Explanation: Commercial DAP is conventionally graded 18-46-0, meaning 18% nitrogen and 46% phosphorus expressed as P₂O₅.
Correct answer: 18% N & 46% P2O5- A. TSP
- B. DAP
- C. None of the above
- D. MAP
Explanation: Zorawar is used as a brand name for mono-ammonium phosphate (MAP), a fertilizer supplying nitrogen and a high proportion of phosphorus.
Correct answer: MAP- A. Phosphorus
- B. Nitrogen
- C. Organic
- D. Zinc
Explanation: Phosphorus is especially important for early root development and proliferation, which is why phosphorus deficiency often produces a…
Correct answer: Phosphorus- A. C12H24O12
- B. C6H12O6
- C. C3H6O6
- D. C5H12O6
Explanation: Photosynthesis converts carbon dioxide and water into glucose, represented by C6H12O6, while oxygen is released as a by-product.
Correct answer: C6H12O6- A. Compress metter
- B. Micrograph
- C. Farinograph
- D. All the above
Explanation: A farinograph measures dough development, consistency and stability by recording resistance during mixing.
Correct answer: Farinograph- A. 150
- B. 175
- C. 201
- D. 225
Explanation: One cup of cooked white rice contains roughly 200 to 205 kcal, depending on serving size and water absorption.
Correct answer: 201- A. All the above
- B. Potassium acetate
- C. Calcium acetate
- D. Sodium acetate
Explanation: Sodium, potassium and calcium acetates can inhibit mould growth in baked products, so the combined option is intended.
Correct answer: All the above- A. Silicoaluminate
- B. Phosphate salts
- C. Magnesium carbonate
- D. All the above
Explanation: Phosphate salts are common chemical leavening agents because they react with bicarbonate to release carbon dioxide, which expands the…
Correct answer: Phosphate salts- A. Ether
- B. Alcohol
- C. Monosodium glutamic acid All the above
- D. All the above
Explanation: Monosodium glutamate, commonly called MSG, enhances savoury or umami flavour by intensifying existing taste.
Correct answer: Monosodium glutamic acid All the above- A. All the above
- B. Aldehydes
- C. Ketones
- D. Esters
Explanation: Esters, aldehydes and ketones are all important classes of compounds used to produce synthetic flavour notes.
Correct answer: All the above- A. Warner-Bratzler sheer
- B. Short meter
- C. Compress meter
- D. All the above
Explanation: A shortometer measures the shortness or brittleness characteristic of pastries, cookies and crackers.
Correct answer: Short meter