Practice Soils and details Questions and Answers

• Which type of layer silicate clay minerals demonstrates a structure comprising two silica tetrahedral sheets and two magnesium-dominated tri-octahedral she...
• Which of the following element is mobile in soil but immobile in plants? 
• Which organic component, constituting approximately 10-30% in plant tissues, is often categorized as "very slowly decomposed"?
• A farmer wants to optimize soil organic matter and minimize nitrogen loss. Which practice would be most effective in achieving this balance?
• Which factor significantly influences the decomposition rate of organic matter in soils?
• What is the primary function of humus in soil?
• Why does a high C: N ratio in added organic matter initially slow down nitrogen availability for plants?
• ……………………………. is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present....
• Disorders like Hollow Stem of Cauliflower; Browning of Cauliflower ; Top sickness of Tobacco is caused due to the deficiency of 
• In which soil order is cryopedoturbation, a frost churning process resulting from the freezing and thawing of soil material, predominantly observed?
• Which of the following is the progeny of breeder seed and is responsible for producing certified seed?
• Which seed class has the minimum genetic purity requirement of 99%?
• Which class of seed is exempted from certification?
• What is the color of the tag used for certified seed?
• How many seasons are there for seed certification in India?
• . …………………………….is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present....
• The Indian council of Agricultural Research (ICAR) set up an All India Soil Survey Committee in 1953 which divided the Indian soils into …….. major gro...
• Soil Health Card Scheme was launched in which year?
• The Only nutrient whose form is available as both anion and cationic form is
• Which of the following types of soil is known for exhibiting a characteristic honey-comb structure, typically formed due to specific environmental conditio...
• Which soil order under USDA Soil Taxonomy is marked by a thick, dark, base-rich surface horizon typically formed under grassland vegetation?
• The cation exchange capacity (CEC) of a soil is mainly governed by its content of which two components?
• The removal of fine materials such as clay and sesquioxides from the upper soil horizon by percolating water is known as:
• A soil sample showing an exchangeable sodium percentage above 15%, a pH exceeding 8.5, and poor structural stability caused by dispersed clay particles, wo...
• In high-rainfall tropical regions, intense leaching removes silica while iron and aluminium oxides accumulate in the soil profile, giving rise to reddish, ...
• A farmer wants to correct a highly acidic soil with a pH around 4.8, mainly to raise the pH closer to neutral and improve nutrient availability for the nex...
• Certain soil bacteria secrete iron-chelating compounds called siderophores mainly to scavenge and acquire which limiting nutrient?
• During composting, the intermediate high-temperature stage in which heat-tolerant microbes dominate and destroy pathogens is called the?
• The soil enzyme phosphatase primarily catalyses the release of inorganic phosphorus from which type of soil compounds?
• Ammonia-oxidising archaea, working alongside ammonia-oxidising bacteria in soil, contribute to which stage of the nitrogen cycle?
• Certain rhizobial bacteria release specific signal molecules called Nod factors mainly to trigger which process in legume roots?
• Under anaerobic, waterlogged soil conditions, sulphate-reducing bacteria convert sulphate into which foul-smelling toxic gas?
• A biocontrol microorganism that suppresses a fungal pathogen by directly parasitising and consuming the pathogen's own hyphae is exhibiting which mechanism...
• Certain Azotobacter species form thick-walled, resistant resting structures under unfavourable soil conditions, which are known as?
• Which soil water constant refers to the maximum amount of water a soil can retain against the pull of gravity after excess water has drained away, and is t...
• The rate at which water moves through a saturated soil under a unit hydraulic gradient, a key soil property used while designing sub-surface drainage syste...
• Which soil physical property is defined as the mass of oven-dry soil per unit volume of undisturbed soil, including its pore spaces, and is commonly used a...
• Which soil textural class generally offers the best combination of water-holding capacity, drainage and aeration, making it considered ideal for most agric...
• Continuous application of physiologically acidic fertilisers such as ammonium sulphate over several years, without any corrective liming, tends to:
• Green manuring, in which a fast-growing legume crop such as dhaincha or sunhemp is grown and ploughed into the soil while still green, is primarily practis...