Biological nitrogen fixation is a process where certain bacteria (like Rhizobium) convert atmospheric nitrogen (N₂) into ammonia (NH₃), which plants can use. This process is catalyzed by the enzyme nitrogenase, which contains molybdenum (Mo) as a key cofactor. Therefore, molybdenum is essential for nitrogen fixation in leguminous plants.
English
30 Questions
30 Marks
27 Mins English English100 Questions100 Marks120 Mins English English75 Questions300 Marks90 Mins EnglishMatch the following correctly
| (a) Broad beds and furrows | 1. Effective in black soils | |
| (b) Compartmental bunds | 2. Convert area into small blocks | |
| (d) Scoops | 3. Formed between rows of crop | |
| (d) Scoops | 4. Small pits on soil surface | |
Codes:
Match the drought terms with their explanation
| drought terms | Their explanation |
| (a) Permanent drought | 1. Arid and semi-arid zones |
| (b) Seasonal drought | 2. Inadequate water to meet evapotranspiration |
| (c) Invisible drought | 3. Agriculture not possible |
| (d) Meteorological drought | 4. Annual rainfall less than normal |
Pigment leghaemoglobin acts as
Total cultivable area in India is ______ million hectares.
The navigation system based on a network of satellites that helps users to record positional information is
Growing season in dry land areas is
Characters of dry land farming
Suggested Test Series
Suggested Test Series
