A. E
B. O
C. B
D. A
Submitted by: Shafiq Rehman
Correct Answer: B ✔
Last Updated: August 15, 2021
Related MCQs
- 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 :
- In land capability classification, class I-Iv are suitable for:_________?
- Metamorphic rocks are classified into:__________?
- Transportation & cementation of primary rocks:
- Igneous rocks are called:__________?
- The soil air contains a number of gases __________ & water vapours:
- Soil is a variable mixture of Major components:
- Soil-forming minerals occurring in rocks do not contain any water, they undergo __________ when exposed to humid conditions & break down as in chemical weathering process:
- Volcanic soils:
- Inceptisols:__________?
- New soils, no or little profile development:
- The soil quality is always deteriorated by:_________?
- Organic matter decomposes rapidly in Pakistani soils because of __________ conditions, that is why our soils generally have < 1% organic matter:
- The capacity of a soil to function on sustained basis promoting plant & animal health:
- The available soil is being polluted quickly by __________ wastes.
- __________ , considered a perfect soil, is a mixture of silt, clay and sand: