isical.ac.in JRF Agriculture & Ecology Entrance Exam Questions Sample : Indian Statistical Institute

Name of the University : Indian Statistical Institute
Degree : JRF Entrance Examination
Document Type : Sample Questions
Name of the Subject : Agriculture & Ecology
Website : http://www.isical.ac.in/~admission/IsiAdmission2017/PreviousQuestion.html

Download Model/ Sample Question Paper: https://www.pdfquestion.in/uploads/7885-Syll-Sample-JAEK-AEB-2014.pdf

ISICAL JRF Agriculture & Ecology Question Paper

Note that the Syllabus for AEB is same as that of AEA.

Related : Indian Statistical Institute JRF Biological Anthropology Entrance Exam Questions Sample : www.pdfquestion.in/7883.html

Instructions

On the answer-booklet write your Name, Registration Number, Test Code, Number of this booklet, etc., in the appropriate places.

This test contains 30 questions in all. For each of the 30 questions, there are four suggested answers. Only one of the suggested answers is correct. You will have to identify the correct answer in order to get full credit for that question. Indicate your choice of the correct answer by darkening the appropriate oval completely on the answer sheet.

You will get :
4 marks for each correctly answered question,
0 marks for each incorrectly answered question and
1 mark for each unattempted question.

Sample questions

1. What is the difference in “Blocking effect” between RBD and LSD trials? In which of the above designs the sources of variation are more controlled? Identify the block effect, if any, in the agricultural experiment described in

2. What are the different indices used to calculate the advantages/disadvantages of intercropping system? What the differences are between inter- and mixed- cropping? State the importance of intercropping in rainfed system.

OR
i) Define any two of the following soil physical parameters-
a) Soil Texture
b) Soil Structure
c) Bulk density
ii) What is meant by particle density? How is it different from the bulk density of soil?
iii) Explain the term soil aggregation. What are the various processes that help in formation of soil aggregates?
iv) What are the type of pore spaces that occur in soil? Explain their usefulness.

3. Write down the differences between:
i) Transpiration and Evaporation
ii) Mixed fertilizers and compound fertilizers
iii) Multiple cropping and Relay cropping
iv) Consumptive use of water and water requirement of crops
4. What is the dominant pulse crop in India? Write down its climatic requirements and rotations followed with this crop. Name five improved varieties of this crop as also the package of practices.

OR
i) What do you mean by isomorphous substitution in clay lattice?
ii) What are the source of constant charges in silicate clays?
iii) Define soil pH. What are the factors affecting the pH of soil.

5. Define drought. What are the different types of drought? What would be the contingent cropping systems in case of early season drought?

OR
Soil health deterioration is the major second generation problem of “green revolution”. Substantiate the statement with appropriate reasons.

Agriculture (Agronomy, Agricultural Chemistry and soil science) :
Answer all questions :
Choose the correct answer :
1. Apatite is a group of minerals which mainly contains
(a) Sulfur
(c) Phosphorus
(b) Nitrogen
(d) Titanium

2. For getting 25% advantage, the LER should be:
(a) 100
(c) 0.15
(b) 1.25
(d) 125

3. A soil with 20me/ 100g CEC and 5me/ 100g exchangeable H will have a base saturation of
(a) 25.0%
(c) 75.0%
(b) 80.00%
(d) 133.3%

4. Hydraulic conductivity of soil varies directly with
(a) Capillary porosity
(c) Non-Capillary porosity
(b) Total porosity
(d) Water holding capacity

5. Which of the following element is not essential for plants but proves to be beneficial for some?
(a) Copper
(c) Boron
(b) Sodium
(d) Iodine

6. Fixation of ‘P’ is more in
(a) Acid soil
(c) Neutral soil
(b) Submerged soil
(d) Saline soil

7. The instrument, which is used, for measuring the relative humidity is known as-
(a) Hygrometer
(c) Anemometer
(b) Axonometer
(d) Hydrometer

8. Percentage of moisture held in soil at a tension of 15 atmosphere is referred to as
(a) Wilting point or wilting percentage
(b) Wilting coefficient of available water
(c) Moisture capacity
(d) None of the above

9. Available potassium of less than 110 kg / ha of soil is considered at
(a) Low
(c) Medium
(b) High
(d) None of these

10. Which soil covers maximum area in India?
(a) Black cotton soil
(c) Alluvial soil
(b) Arid and desert soil
(d) Lateritic soil

11. Phosphorus content in India soil ranges from
(a) 0.03 – 0.06%
(c) 2.0 – 5.8%
(b) 10 – 15%
(d) 0.8 – 1.0%

12. The study of the relationship of agricultural crops and environment is called
(a) Auto-ecology
(c) Agro-ecology
(b) Agro-climatology
(d) Agro-meteorology