Q. Consider the statements -
Assertion (A) : Among various types of soils, clay retains highest amount of water.
Reason (R) : Clay has pore spaces of large size.
Select the correct answer using the codes given below :
1) Both (A) and (R) are true and (R) is the correct explanation of (A).
2) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3) (A) is true, but (R) is false.
4) (A) is false, but (R) is true
Q. Which one of the following substances is a herbicide?
1) Chlorpyrifos
2) Carbendazim
3) Quinolphos
4) Butachlor
Q. Among Indian States, which state has the highest yield (per hectare) of rice?
1) West Bengal
2) Uttar Pradesh
3) Haryana
4) Punjab
Q. Which one of the following pairs is not correctly matched?
1) Cuscuta - stem parasite
2) Chandan - root parasite
3) Orchids - epiphyte
4) Nepenthes - hydrophyte
Q. Among the Indian States Uttar Pradesh is the largest producer of which of the following crops ?
1) Wheat, Potato, Groundnut
2) Wheat, Potato, Sugarcane
3) Potato, Sugarcane, Cotton
4) Potato, Sugarcane, Paddy
Q. Which among the following statements is not true?
1) Rust is a disease found in wheat
2) Early blight is a disease found in Potato
3) False smut is a disease found in barley
4) Khaira is a disease found in paddy
Q. The water holding capacity of defferent types of soils decreases in the order -
1) Clay > Silt > Sand
2) Clay > Sand > Silt
3) Sand > Silt > Clay
4) Silt > Sand > Clay
Q. Groundwater mining in coastal areas can result into -
1) increase in the salinity of groundwater
2) decrease in the toxicity of groundwater
3) decrease in the salinity of groundwater
4) increase in the water table
Q. Which of the following is not an important characteristic of the Green Revolution ?
1) Mechanized agriculture
2) Hybrid seeds
3) Slash and burn
4) Monoculture
Q. The three primary soil macronutrients are -
1) carbon, oxygen, and water
2) copper, cadmium and carbon
3) potassium, phosphorus and nitrogen
4) boron, zinc and manganese
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