Plant Nutrient most important Question & Answer [y]
This Questions are most important for ICAR-JRF, BHU, Pre-PG, NET, AO, AAO, IBPS-SO/AFO [y]
Q. 21. Which group is required for chlorophyll synthesis?
a) Mo, Ca
b) Ca, K
c) Cu, Ca
d) Fe, Mg
d) Fe, Mg
Q. 22. Which element is common to nucleic acids, phospholipids, ATP and ADP?
a) Ca
b) B
c) Zn
d) P
d) P
Q. 23. Which of the following are critical elements?
a) N, P, K
b) O, N, H
c) Zn, Fe, Cu
d) Cl, Fe, H
a) N, P, K
Q. 24. The formula for balanced salt solution of mineral elements for plant growth was given by ?
a) Knop
b) Hoagland
c) Watson
d) Hill
a) Knop
Q. 25. Deficiency of which element in soil causes chlorosis in plants ?
a) Iron
b) Magnesium
c) Carbon
d) Sodium
b) Magnesium
Q. 26. Total amount of water present in the soil is called ?
a) Combined water
b) Holard
c) Podsole
d) None of these
b) Holard
Q. 27. The smallest 3D volume of a soil needed to give full representation of horizontal variability of soil is termed as
a) Solum
b) Gleys
c) Podsol
d) Pedon
d) Pedon
Q. 28. Formation of soil is known as
a) Humification
b) Pedogenesis
c) Sedimentation
d) All of these
b) Pedogenesis
Q. 29. The Planning Commission divided the country in how many agro climatic zones?
a) 8
b) 15
c) 20
d) 24
b) 15
Q. 30. Who among the following divided the world in 6 Biogeographical regions ?
a) Charles Darwin
b) Alfred Russel
c) Lamarck
d) Aristotle
b) Alfred Russel