A. Nitrates, Phosphates
B. Calcium, magnesium
C. Amino acids
D. All of the above
Submitted by: Shafiq-ur-Rehman
Correct Answer: All of the above ✔
Last Updated: March 18, 2022
Related MCQs
- The solid wastes generated in Pakistan are about: __________?
- Almost one third of the land area through out the world is affected by land degradation. Pakistan’s agriculture sector though facilitates employment to >65% but is facing challenges from:
- Term forest is derived from: __________?
- Vegetation found in saline soils is termed by _________?
- Plants which grow on sandy soils:_________?
- Which nutrients are immobile in plants?
- 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?