All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 115 of 116
- A. Humus
- B. Composet
- C. Farm yard manure
- D. All the above
Explanation: Compost is organic material that has undergone partial decomposition and is used as an amendment.
Correct answer: Composet- A. Cellulose
- B. Organic acid
- C. Humus
- D. All the above
Explanation: Humus is the dark, stable organic matter formed after extensive decomposition of plant and animal residues.
Correct answer: Humus- A. 2
- B. 3
- C. non of these
- D. 4
Explanation: Under the conventional classification, saline soil has an electrical conductivity of the saturation extract of at least 4 dS/m at 25°C.
Correct answer: 4- A. Diffusion
- B. Percolation
- C. Absorption
- D. All the above
Explanation: Percolation is the downward movement of water through the soil profile under gravity.
Correct answer: Percolation- A. Water pressure
- B. Soil moisture
- C. Wind pressure
- D. None of the above
Explanation: A tensiometer measures the tension with which soil holds water, which indicates the soil-moisture status available to plants.
Correct answer: Soil moisture- A. 50%
- B. 10%
- C. 45%
- D. 30%
Explanation: Severe salinity can make roughly one-tenth of affected agricultural land unproductive by restricting water uptake and causing ion…
Correct answer: 10%- A. Ranking
- B. Annuals
- C. Perennials
- D. Classification
Explanation: Soil classification is the systematic grouping of soils into categories according to their properties, formation and distinguishing…
Correct answer: Classification- A. NO3
- B. Both a and b
- C. NH4
- D. non of these
Explanation: Plants can absorb nitrogen mainly as nitrate (NO3−) and ammonium (NH4+), so both forms are available to roots.
Correct answer: Both a and b2289. Gaseous loss of a substance from the soil or from fertilizer or manure is called_________________?
- A. Transpiration
- B. Evaporation
- C. Volatilization
- D. Evapotranspiration
Explanation: Volatilization is the conversion and escape of a substance into the gaseous phase, commonly causing loss of nitrogen from urea or manure.
Correct answer: Volatilization- A. 4.00
- B. 3.5
- C. non of these
- D. 8.0
Explanation: Urea fertilizer is commonly described as having an alkaline reaction around pH 8 because hydrolysis produces ammonium and hydroxyl ions.
Correct answer: 8.0- A. pH
- B. EC
- C. Cl
- D. Saliruiy
Explanation: pH is defined as the negative logarithm of hydrogen-ion activity or concentration and indicates acidity or alkalinity.
Correct answer: pH- A. Plants can not complete their life cycle in absence of that element
- B. Nutrients has some physiological function in metabolism of plant
- C. All the above
- D. Deficiency symptoms can be removed by application of that putrid
Explanation: An essential element is required for completion of the plant life cycle, performs a specific physiological or metabolic function, and…
Correct answer: All the above- A. Less oxygen as compared 10 atmosphere
- B. More carbon dioxide as compared to atmosphere
- C. None of the above
- D. Both a & b
Explanation: Soil air generally contains less oxygen and more carbon dioxide than atmospheric air because roots and soil organisms consume oxygen and…
Correct answer: Both a & b- A. Mycorrhizae
- B. Rhizospher
- C. Root fungi
- D. None of the above
Explanation: Mycorrhiza is a mutualistic association in which fungi colonize plant roots, receiving carbohydrates while improving the plant’s uptake of…
Correct answer: Mycorrhizae- A. Wheat
- B. Vegetables
- C. Race
- D. Cotton
Explanation: Zinc deficiency is especially common in flooded rice soils because flooding reduces zinc availability to plant roots.
Correct answer: Race- A. Crops
- B. Regions
- C. Seasons
- D. Soils
Explanation: Field capacity and permanent wilting point are characteristic moisture limits that vary mainly with soil texture, structure and…
Correct answer: Soils- A. llluviation
- B. Eluviation
- C. Alluviation
- D. Deposition
Explanation: Illuviation is the downward accumulation in a lower soil horizon of clay, iron, organic matter or other materials removed from an upper…
Correct answer: llluviation- A. 5-20 Kg
- B. 2-3Kg
- C. 5-7 Kg
- D. 20-25 Kg
Explanation: Wheat removes roughly 2–3 kg of elemental phosphorus per tonne of grain produced; figures of about 5–7 kg commonly refer to phosphorus…
Correct answer: 2-3Kg- A. Below 6
- B. Above 10
- C. Above 6
- D. None of the above
Explanation: Nitrogen mineralization is carried out by soil microorganisms and is markedly restricted in strongly acidic soils, particularly below…
Correct answer: Above 6- A. 12 million to
- B. 13.05 million lia
- C. 22 million ha
- D. 15 million lva
Explanation: About 13.05 million hectares in Pakistan are affected by water erosion.
Correct answer: 13.05 million lia