List of top Questions asked in ICAR AIEEA (PG)

Soil loss tolerance values at top soil depth vary between :

Which of the following statements are correct with respect to Radiation method for estimation of reference crop evapotranspiration.
(A) Radiation method is essentially an adaptation of Hawksley formula.
(B) Radiation method is suggested for areas where available climate data include measured wind and humidity.
(C) In equatorial zone the radiation method may be more reliable than Blanney-Criddle approach.
(D) The amount of radiation received at the top of the atmosphere (Ra) is dependent on latitutde and the time of year only.
Choose the correct answer from the options given below :

Which of the following statements are correct pertaining to evaporation processes ?
(A) The gross escape of water molecules from the liquid state to the gaseous state constitutes evaporation.
(B) The latent heat of vaporization at about 685 cal/g of evaporated water must be provided by the water body.
(C) The rate of evaporation increases always with the wind speed.
(D) Deep water bodies have more heat storage than shallow ones.
Choose the correct answer from the options given below :

A farmer has 4000 \(\text{m}^2\) area. How much water is required for irrigation to be applied at 5 cm depth ?

Given below are two statements :
Statement (I) : Soil having high amount of hydrogen ions affect the nutrient availability.
Statement (II) : Increased soil pH beyond 7.0 increases the availability of micronutrients.
In light of the above statements, choose the most appropriate answer from the options given below. :

Blossom end rot disease in tomato is caused due to deficiency of which of the following nutrient.

Among the following statement(s), what is true about colloids?
(A) They do not settle down when left undisturbed
(B) They are not visible to the naked eyes
(C) Their size generally ranges between \(10^{-5}\) and \(10^{-7}\) cm
(D) A colloidal solution is homogeneous in nature
Choose the correct answer from the options given below:

Which of the following match(es) is correct ?
(A) Laterite soil - pH 7-8
(B) Black soil - has high amount of clay
(C) Alkali soil - pH 9
(D) Red soil - calcareous
Choose the correct answer from the options given below :

What are the type of phosphate ions available for plant uptake in alkali soil ?

In saline soils boron concentration is very important from plant growth point of view. What is the safe limit of water soluble boron concentration in a saline soil.

The range of Cation exchange capacity of kaolinite clay mineral is :

Who among the followings is known as father of soil physics ?

The yield of many crops is restricted at what range of electrical conductivity of the saturation extract of a soil :

At what value of sodium adsorption ratio, a soil is considered as Alkali soil :

The gypsum equivalent of sulphuric acid for 2000 kg of gypsum is :

Matric Potential of which of the following is low :

If the soil in a core of diameter 4 cm, height 7 cm, weighs 170 g after drying and the weight of core without soil is 50 g, then the bulk density of the soil is :

In a hydraulic conductivity study, a 15 cm thick water-saturated soil layer was allowed a 15 cm water layer above it vertically, and the water was allowed to pass through the soil for 45 minutes. A total of 540 cc of water was collected. The cross-sectional area of the soil layer was 30 cm². Calculate the discharge rate of flow of water through the soil.

A swimmer is at 2 meter above the bottom in an 8 m deep rectangular pond which is filled to \(3/4^{\text{th}}\) of its depth. What will be the pressure on the swimmer?

Which one of the followings is not true about soil consistency ?

Which of the following equation expresses the velocity of settling particles as described by Stokes law ?

If irrigation water contains carbonate, bicarbonates, calcium and magnesium ions as 4.0, 2.0, 2.5 and 1.5 me/L^-1, respectively, then the residual sodium carbonate content of irrigation water is:

The concentration of salt in the irrigation water having EC of 20 dS/m is :

Soil primary particles sand, silt and clay are arranged to form which of the following :