Crop rotation is considered good agricultural practice for the following reasons :
1.it maintains fertility of the soil. for example a legume rotation is very useful because leguminous plants give nitrogen to the soil, so farmer gets higher yields.
2. Weeds are also destroyed as continuous weeding is done .
3. It also helps in control of insects and diseases in plants.

1. A globe is a three-dimensional sphere while, a map is two-dimensional.
2. A globe represents the whole earth, whereas a map may represent the whole earth or just a part of it.
3. A globe can be used to get a broad-level picture of the world while, map provides more specific information about different places.
4. A globe, being spherical in shape, spins around an axis. However, a map, being a representation on a piece of paper, does not spin.
5. A globe is made of hard material and cannot be folded making it difficult to be carried around, unlike maps, which are made on paper and can be easily folded and carried around.

The living organisms that you fail to see with your eyes and which can be seen only with the microscope are called as micro-organisms. These microorganisms are very small and widely found.
The study of microorganisms is known as microbiology

3x+2x-45
= 5x - 45

(3x)2+(4-5)3x+(4x-5
= 6x + (-1)3x + 4x - 5
= 6x - 3x + 4x - 5
= 7x - 5

Its mainly done to prevent seed-borne diseases.However,seeds may germinate,even if not treared with fungicides solution.
Fungicide seed treatment protects seeedlings from both seed-borne pathogen as well as soil-borne pathogens.

The Battle of Plassey was fought between the forces of the Nawab of Bengal Siraj-ud-Daulah and the English East India Company, led by Robert Clive. It was fought on 23 June 1757 at Plassey near Murshidabad. A major portion of the 50,000 strong army of the Nawab was controlled by Mir Jafar who was hand in gloves with the British. His men did not join the battle at a crucial time. As a result, the Nawab’s men suffered heavy casualties and he himself left the battlefield after the death of his commander Mir Madan. This was a major blow to the Nawab’s army which was, as a result, easily defeated by the British. Later, the Nawab himself was caught and killed, and Mir Jafar was instituted as the new Nawab of Bengal.

If there are no restrictions on the power of the elected representatives the leaders might misuse the powers given to them. The Indian Constitution provides safeguards against this misuse of power by our political leaders. The Constitution lays down rules that guard the citizens against misuse of power.

Drip irrigation, also known as trickle irrigation or micro irrigation or localized irrigation, is an irrigation method that saves water and fertilizer by allowing water to drip slowly to the roots of plants, either onto the soil surface or directly onto the root zone, through a network of valves, pipes, tubing, and emitters. It is done through narrow tubes that deliver water directly to the base of the plant.

History is certainly about changes that occur over time. It is about finding out how things were in past and how things have change. As soon as we compare the past with the present we refer to the time, we talk "before" and "after"

1. Sovereign:- This word implies that India is neither a dependence nor a dominion of any other nation but an independent state. There is no authority above it, and it is free to conduct its own affairs (both internal and external). Being a sovereign state, India can either acquire a foreign territory or cede a part of its territory in favour of a foreign state.

2. Socialist:- Even before the term was added by the 42nd Amendment in 1976, the Constitution had a socialist content in the form of certain Directive Principles of State Policy.

Notably, the Indian brand of socialism is a 'democratic socialism' and not a 'communistic socialism' (also known as 'state socialism') which involves the nationalisation of all means of production and distribution and the abolition of private property. Democratic socialism, on the other hand, holds faith in a 'mixed economy' where both public and private sectors co-exist side by side'. As the Supreme Court says, 'Democratic socialism aims to end poverty, ignorance, disease and inequality of opportunity. Indian socialism is a blend of Marxism and Gandhism, leaning heavily towards Gandhian socialism'.

3. Secular:-The term 'secular' too was added by the 42nd Constitutional Amendment Act of 1976. However, as the Supreme Court said in 1974, although words 'secular state' is not mentioned in the Constitution, there can be no doubt that Constitution-makers wanted to establish such a state and accordingly Articles 25 to 28 (guaranteeing the fundamental rights to freedom of religion) have been included in the constitution.
4. Democratic:-A democratic polity, as stipulated in the Preamble, is based on the doctrine of popular sovereignty, that is, possession of supreme power by the people.

5. Republic:-A democratic polity can be classified into two categories—monarchy and republic. In a monarchy, the head of the state (usually king or queen) enjoys a hereditary position, that is, he comes into office through succession, eg, Britain. In a republic, on the other hand, the head of the state is always elected directly or indirectly for a fixed period, eg, USA. Therefore, the term 'republic' in our Preamble indicates that India has an elected head called the president. He is elected indirectly for a fixed period of five years.

All fabrics are obtained from fibres and fibres are obtained from artificial or man-made sources.  It consists of small unit or a polymer which is made from many repeating units known as monomers. Example: rayon, nylon, polyester, etc.

The ploughed soil is levelled by pressing it with a wooden leveller so that the top soil is not blown away by wind or drained off by water. The levelling of ploughed fields prevents the top fertile soil from being carried away by strong winds or washed away by rain water.

The most important aspect of secularism is its separation of religion from State power. This is important for a country to function democratically. Almost all countries of the world will have more than one religious group living in them. Within these religious groups, there will most likely be one group that is in a majority. If this majority religious group has access to State power, then it could quite easily use this power and financial resources to discriminate against and persecute persons of other religions. This tyranny of the majority could result in the discrimination, coercion and at times even the killing of religious minorities. The majority could quite easily prevent minorities from practising their religions. Any form of domination based on religion is in violation of the rights that a democratic society guarantees to each and every citizen irrespective of their religion. Therefore, the tyranny of the majority and the violation of Fundamental Rights that can result is one reason why it is important to separate the State and religion in democratic societies. 

Perfect square is an integer that is the square of an integer.
For example, 9 is a square number, since it can be written as 3 × 3.