A. Ca only
B. B only
C. P only
D. Both Ca & B
Submitted by: Shafiq Rehman
Correct Answer: D. Both Ca & B ✔
Last Updated: August 15, 2021
Related MCQs
- The highest Cation Exchange Capacity is in:_________?
- Fossils are found in which type of rock:
- A & B horizon is called as:________?
- Availability of Phosphorus is maximum at:__________?
- Flow of nitrogen in soil due to:_________?
- Field Capacity is a point at which?
- Which of the following nutrient play the most effective role in controlling rate of transpiration:
- Which is the correct sequence of soil erosion by water:
- The clay fraction of the soil contains particles less than 0.002 mm. Particles <0.001 mm size:
- Soil order Vertisol is related to:_________?
- Which type of structure is dominant in grasslands:
- The study of relationship between soil properties & plant production is known as:_________?
- Soil conservation is performed by:_________?
- One of the following is not a form of water erosion:
- “Wash-in” takes place in which horizon?
- The soil texture refers to the relative proportion of sand,__________ and clay:
- The capacity of a soil to function on sustained basis promoting plant and animal health:
- Effects of soil pollution may also include:__________?
- Chemicals, used for controlling the disease of crops, fruits & vegetables is__________ & chemical prepared for controlling insect-pests ——————-:
- Soils are also contaminated by a number of inorganic compounds which are also high toxic to human & other animals & are extremely poisonous may include:
- Moderately toxic compound:_________?
- Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:
- Items needed for synthesis of plant food in green leaves are _________ & the process through which it takes place is called photosynthesis:
- The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:_________?
- From the sources of plant nutrients availability in soil, which of the following statements are correct:
- Ammonium sulfate fertilizer containing 21% N & 24% S, is best in top dressing in:_________?
- Immobile nutrient in soil is:_________?
- Irregular rock masses formed in the pre-existing cracks & crevices are:__________?
- What happens when an saline-alkaline soil is reached with water:
- Azotobacter fixes atmospheric nitrogen in the soil by:__________?
- Maximum fixation of K occurs:__________?
- Conversion of inorganic P to organic P is known as:_________?
- N and P sprayed on the leaves at time of flowering results in:________?
- How many type of soil colloids?
- Auxin is_______?
- The drawbacks of erosion can be divided into:__________?
- Shallow channels that can be readily corrected by routine tillage operations is called:
- __________ systems play a crucial role in increasing soil organic C storage and reducing net emissions of greenhouse gases in addition to soil erosion control:
- An important component of total soil C is charcoal, also known as:__________?
- Which is the main cause of desertification?
- Deforestation may decrease the chances of__________?
- Extrusive rocks are also called as __________ in which the grain or crystalline structure is too fine to be seen by the unaided eye?
- What civil engineers called soil?
- In alkaline soil which form of phosphorus uptake by plants?
- In acidic soil which form of phosphorus uptake by plants?
- In which form plant uptake phosphorus?
- The forest soils have lower bulk density than agricultural soils because of their ______ content.
- Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:
- Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:
- Nutritive elements needed in large quantities to ensure normal plant development:
- Essentiality criteria of an element :