On the basis of the communication channels, types of communications are:

1. Verbal: This involves the use of language and words for the purpose of passing on the intended message. In general terms, Verbal Communication means communication in the form of spoken words only. But, in the context of types of communication, verbal communication can be in the spoken or the written form.
2. Non-Verbal: In this type of communication, messages are relayed without the transmission of words. The messages here are wordless messages. This form of communication mainly aides verbal communication. It supplements it with gestures, body language, symbols, and expressions.
3. Visual: This is communication through visual aids like drawings, placards, presentations, and illustrations, etc.

Zamindars were recognized as owner of the lands. Zamindars were given the rights to collect the rent from the peasants. Major areas of introduction include Madras, Bombay, parts of Assam and Coorgh provinces of British India.In Ryotwari System the ownership rights were handed over to the peasants.

The process of circulation of nitrogen between the atmosphere, soil, plants and animals is called the nitrogen cycle. Atmospheric nitrogen is fixed by biological nitrogen fixers as well as through physical processes such as lightning.

Nitrogen Fixation during Lightning

• During lightning, nitrogen and oxygen from the atmosphere combine together and form nitrogen oxides. These gases react with rainwater to form dilute nitric acid. The nitric acid then reacts with minerals present in the soil to form nitrates.
• Plants take in nitrates from the soil through their root system and convert them into proteins. Animals consume these plants and the proteins then enter into their bodies indirectly.
• When plants and animals eventually die, the nitrogenous compounds present in their bodies are broken down into ammonia. This process is known as ammonification.
• Ammonia is converted to nitrates by nitrifying bacteria such as Nitrosomonas and Nitrobacter through a process called nitrification.
• Nitrates may be stored in the form of humus, or they can be leached from the soil and carried to lakes and reservoirs.
• Nitrates can also be converted to free molecular nitrogen by denitrifying bacteria such as Pseudomonas through a process called denitrification and returned to the atmosphere.
• Due to constant recycling of nitrogen, the percentage of nitrogen in the atmosphere remains more or less constant. 

The crust (upper part) of the earth has been formed out of seven major and some minor plates. These are calledtectonic plates. A Tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of bothcontinental and oceanic lithosphere.

In mathematics, the Euclidean algorithm, or Euclid's algorithm, is an efficient method for computing the greatest common divisor (GCD) of two integers (numbers), the largest number that divides them both without a remainder. When that occurs, they are the GCD of the original two numbers.

The crust (upper part) of the earth has been formed out of seven major and some minor plates. These are calledtectonic plates. A Tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of bothcontinental and oceanic lithosphere.