Soil Science - Study Mode
[#556] Which fertilizer has risk of fire or even explosion
Correct Answer
(B) Ammonium nitrate
Explanation
Solution: Ammonium nitrate is a fertilizer that has a risk of fire or even explosion. It exploded abroad on a ship docked near Texas City, Texas in 1947. It can explode on its own if its temperature is raised to 400 degrees Fahrenheit, as it belongs to a chemical class known as oxidizers.
[#557] In 1843, Agricultural Experiment Station at Rothamsted, England was started by
Correct Answer
(C) Lawes and Gilbert
Explanation
Solution: In 1843, Agricultural Experimental Station at Rothamsted, England was started by Sir John Bennet Lawes and Sir Joseph Henry Gilbert . It is one of the oldest agricultural research institutions in the world, located at Harpenden in the English countryside and is a registered charity under English Law.
[#558] Which of the following nutrients is available at neutral pH value?
Correct Answer
(D) Phosphorus
Explanation
Solution: Phosphorus is the nutrient available at a neutral pH value. Soils with pH values between 6 and 7.5 are ideal for phosphorus availability, while pH values below 5.5 and between 7.5 and 8.5 limits phosphorus availability to plants due to fixation by aluminium, iron or calcium.
[#559] One atmosphere means
Correct Answer
(C) 0.5 bar
Explanation
Solution: An atmosphere is a unit of measurement of air pressure. it is approximately equal to Earth’s average atmospheric pressure at sea level. Its symbol is atm . It is a unit of pressure defined as 101.325 Pa. 1 atmosphere = 0.5 bar
[#560] ATP consumption (photosynthesis) & production (respiration) are which kind of reaction respectively?
Correct Answer
(A) Endothermic & exothermic
Explanation
Solution: Photosynthesis is the process of ATP consumption to prepare food by plants and that is an Endothermic process that shows energy is utilized to work. On the other hand Production of ATP is done by the Respiration process and it is an exothermic process in which energy is released.