IAS Mains Agriculture 2005
Paper-I
Section-A

Write short notes on any three of the following in about 200 words each: 20 × 3 60

Biological methods of weed control

Potential evapotranspiration

Mineralogical organisation of silicate days

Modemisation in agriculture environmental pollution

What are the causes of water logging in our country? How are the soil and crop productivity affected by it? Suggest methods of prevention to enhance agricultural production.

Write the nitrogen transformation processes in soils. What changes does nitrogen undergo regarding losses and availability? Why are legume crops beneficial in nitrogen fixation?

Give in tabular form sowing time, seed rate, spacing, fertilizer, irrigation and average yield in India of jowar, sunflower, peas, soyabean, mustard and groundnut for higher production.

Section B

Write short notes on any three of the following in 200 words each: 20 × 3 60

Lab to land programme

Soil profile

Agro forestry

Sprinkler irrigation system

What are the essential elements required for the growth of higher plants? Write the role of trace elements. How is the availability of these affected in varying soil conditions?

Differentiate between management of a farm and farm management. How is farm management useful to farmers of our country? What is the scope of farm management on small farms?

What are the difference between formal education and extension education? Which are the extension methods employed to introduce new agricultural technologies for the farming community? Write the beneficial effects of extension for increasing agricultural production.