List of top Soil Science Questions

Arrange the following factors affecting irrigation water quality in agriculture in the correct sequence:
(A) Salinity
(B) pH
(C) Sediment content
(D) Chemical contaminants
Assertion (A): Implementing agroforestry practices helps in soil conservation.
Reason (R): Agroforestry combines the cultivation of trees and crops on the same land, which reduces soil erosion by providing ground cover and enhancing soil structure through the roots of trees.
The pF curve is same as
Microorganisms that oxidise ammonia to nitrite
(A) Nitrosomonas
(B) Thiobacillus
(C) Nitrobacter
(D) Nitrosolobus
Choose the correct answer from the options given below:
Which of the following is/are the example of nitrifying bacteria?
Arrange the following in decreasing order of Basal Spacing:
(A) Kaolinite
(B) Montmorillonite
(C) Illite
(D) Vermiculite
Choose the correct answer from the options given below:
The term oligotrophic refers to
Bray No. 1 is

Match List-I with List-II:

Dolomite is a source of
(A) Calcium
(B) Magnesium
(C) Iron
(D) Sulphur
Choose the correct answer from the options given below:
Elements associated with nitrogenase enzyme in biological nitrogen fixation
(A) Molybdenum
(B) Iron
(C) Copper
(D) Nickel
Choose the correct answer from the options given below:
Mottle leaf of citrus is caused by the deficiency of
The steady-state soil infiltration rate is
Assertion (A): Equilibrium water content in soil at a certain matric potential is higher when the soil is under the drying process (desorption) compared to when the soil is under the wetting process (sorption).
Reason (R): The contact angle between water and the soil solid phase is greater during the imbibition of water than during drainage.
The parameters of N use efficiency are
(A) Apparent N. recovery
(B) Agronomic efficiency
(C) Production efficiency
(D) Physiological N efficiency
Choose the correct answer from the options given below:
Which of the following nutrient is related with deficiency symptoms like discoloration of leaf buds, breaking and dropping of buds?
Assertion (A): Gypsum is commonly used for the reclamation of sodic soil.
Reason (R): Reclamation process involves reduction in exchangeable sodium with calcium and its removal from soil solution through leaching.
Laterite soil is rich in
The amount of organic matter in a soil with 'Value 0' according to Munsell colour system is--
Arrange the following in decreasing order according to the number of linkages among silicon tetrahedra of soil particles:
(A) Nesosilicates
(B) Phyllosilicates
(C) Tectosilicates
(D) Inosilicates
Choose the correct answer from the options given below:
Statement (I): Single superphosphate, double superphosphate, triple superphosphate are mono-calcium phosphate.
Statement (II): Mono calcium phosphates are water soluble and thus have high leaching losses.
The organic certificate of an organic farm is valid for
Organic nutrients in water bodies promote
Weed not found in rice crop is:
A stem nodulating plant: