Answer:
Arid soils are saline in nature due to the high salt content and poor nitrogen. However, they are rich in plant food. The colour of Arid soils ranges from red to brown. Suitable Crops of Arid Soils – You can grow any drought and saline-tolerant crops such as wheat, cotton, corn (maize), millets, pulses, and barley.
Explanation:
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A jet stream is a fast flowing air current that occurs in the atmosphere of earth and other planets. A global wind belt is formed by the Earth's spin and the unequal heating of the earth via sunlight
A AND C
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Answer:
The main purpose of the H.M.S. Challenger voyage was to gather data about the Earth's oceans.
Explanation:
The 1870s voyage of the H.M.S. Challenger covered 68,000 nautical miles and it was considered the first real oceanographic expedition. Doctors and scientists and other crew members spent 1,000 grueling days at sea with many becoming sick or leaving the expedition at the various ports of call because it was difficult and challenging. and covered more than 68,000. The expedition yielded a wealth of information about the ocean environment. Those aboard identified many organisms that were new to scientists, and they gathered data on the currents and the ocean floor. The research from the voyage was published in a large 50-volume report that took researchers 23 years to put together.