616: Which one of the following National Highways passes through Maharashtra Chhattisgarh and Orissa ?
(a) NH 4
(b) NH 5
(c) Nh 6
(d) NH 7
Explanation:
NH4 - Thane - Chennai
NH5 - Jharpokhari - Chennai (Along east coast)
NH6 - Hajra, Kolkata vai Nagpur, Sambalpur and Raipur
NH& - Varanasi - Kanyakumari via Jabalpur, Nagpur, Hyderabad, Bangalore and Madurai (longest in the country).
617: Which one of the following countries does not border Lithuania?
(a) Ukraine
(b) Belarus
(c) Poland
(d) Latvia
Explanation:
Lithuania is not bordered by Ukaraine.
618: Which of the following statements regarding laterite soils of India are correct?
1. They are generally red is colour.
2. They are rich in nitrogen and potash.
3. They are well developed is Rajasthan and UP.
4. Tapioca and cashew nuts grow well on these soils
Select the correct answer using the codes given below.
(a) 1 and 4
(b) 2 and 3 only
(c) 1, 2 and 3
(d) 2, 3 and 4
Explanation:
Laterite soils are red in color because of iron oxides.
Laterites are formed from the leaching of parent sedimentary rocks which leaves the more insoluble ions, predominantly iron and aluminium.
Laterite soil and is mainly found on the summits of the Western Ghats, Eastern Ghats, Rajmahal Hills, Vindhyas, Satpuras and Malwa plateau, thus abundant in Karnataka, Kerala, Tamil Nadu, Madhya Pradesh and the hilly areas of Odisha and Assam.
Laterite soil is poor in organic matter, nitrogen, phosphate and calcium, while iron oxide and potash are in excess.
Manures and fertilisers are required for making the soils fertile for cultivation.
Tapioca, cashew nuts, ragi etc. grow well on these soils.
Laterite soils are widely used as bricks.
619: Grenada is situated in:
(a) Pacific Ocean
(b) Indian Ocean
(c) Caribbean Sea
(d) Mediterranean Sea
620: Consider the following agricultural practices :
1. Contour bunding
2. Relay cropping
3. Zero tillage
In the context of global climate change, which of the above helps/help in carbon sequestration / storage in the soil?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None of them
Explanation:
Soil carbon sequestration is the process of transferring carbon dioxide from the atmosphere into the soil through crop residues and other organic solids, and in a form that is not immediately reemitted.
Soil carbon sequestration helps carbon to entrap in Soil. Tilling the Soil increase the microbes hence increasing the soil breakdown which assist in Carbon releasing from the soil. Hence zero tillage is one of the way of Soil carbon sequestration.