Agronomy - Study Mode
[#261] At what pressure tensiometer is used?
Correct Answer
(B) 0 to 0.8 bar
Explanation
Solution: A tensiometer is a device used for measuring soil water tension. It is used at a pressure of 0 - 0.8 bar. It is effective up to a tension of 0.8 bar. At this pressure, air enters the closed system through the pores of the cup and makes the unit operative. It is useful to check the moisture in the soil and help in deciding when to irrigate the field.
[#262] Shifting cultivation is practiced in
Correct Answer
(D) NE Himalayan region
Explanation
Solution: Option A: Southern hills The southern hills, including parts of Tamil Nadu, Kerala, and Karnataka, have hilly terrains, but shifting cultivation is not a dominant practice here. These regions mostly practice settled agriculture with crops like tea, coffee, and spices due to favorable climate and soil conditions. Shifting cultivation may occur in isolated tribal pockets, but it is not widespread. Option B: Western Ghats The Western Ghats stretch along the western coast of India and are known for their biodiversity and evergreen forests. Agricultural practices here include plantation crops such as rubber, coffee, tea, and spices. Shifting cultivation is not a common practice in this region, as the terrain and economic development favor permanent and commercial farming. Option C: Western Himalayan region The Western Himalayan region includes parts of Jammu & Kashmir, Himachal Pradesh, and Uttarakhand. This area is characterized by temperate climate and terraced farming on hilly slopes. The focus is on crops like barley, wheat, and maize. Shifting cultivation is rarely practiced here due to different cultural and environmental conditions. Option D: NE Himalayan region The North-Eastern Himalayan region, which includes states like Arunachal Pradesh, Nagaland, Manipur, Mizoram, and parts of Assam and Tripura, is the primary area in India where shifting cultivation (jhum cultivation) is extensively practiced. Tribal communities clear forest patches by burning and then cultivate the land for a few years before moving to a new patch, allowing the old one to regenerate. This method is well-adapted to the hilly, forested terrain and cultural traditions of the region. Conclusion: Among all the options, the NE Himalayan region is the most appropriate and widely recognized region for shifting cultivation in India. Therefore, the correct answer is Option D: NE Himalayan region.
[#263] Dehaulming in potato is done to obtain
Correct Answer
(B) Hardening of skin of tuber
Explanation
Solution: Dehaulming in potatoes is the process of removing the vegetative part of the potato plant that is above the ground from the root. It is the pre-harvest practice done to allow hardening of the skin of potato tubers to reduce injuries and damage to potatoes during post-harvesting and supply.
[#264] CIMAP, Lucknow is mainly working on
Correct Answer
(B) Medicinal and aromatic crops
Explanation
Solution: CIMAP stands for Central Institute of Medicinal and Aromatic Plants. It is a plant research laboratory of the Council of Scientific and Industrial Research (CSIR) located in Lucknow. It is steering multidisciplinary high quality research in biological and chemical sciences and extending technologies and services to the farmers of medicinal and aromatic plants.
[#265] The capacity of a soil to resist appreciable change in pH value is called
Correct Answer
(B) Buffering capacity
Explanation
Solution: The capacity of a soil to resist appreciable change in pH value is called Buffering capacity . It is the resistance in the soil to variations in pH and due to the colloidal humus and clay fractions. It allows the soil to resist any change.