Question

3. Tools needed to carry out agriculture practices​

Answer 1

Answer:

L.H.S. = x2 – y2

= (p sec θ + q tan θ)2 – (p tan θ + q sec θ)2

= p2 sec θ + q2 tan2 θ + 2 pq sec 2 tan 2 -(p2 tan2 θ + q2 sec2 θ + 2pq sec θ tan θ)

= p2 sec θ + 2 tan2 θ + 2pq sec θ tan θ – p2 tan2 θ – q2 sec θ – 2pq sec θ tan θ

= p2(sec2 θ – tan2 θ) – q2(sec?2 θ – tan2 θ) =

= p2 – q2 …[sec2 θ – tan2 θ = 1

= R.H.S.hii

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Answer 2

Answer:

Explanation:

Agricultural tools such as sickle, plough, hoe, drills, etc. are implemented in agricultural activities to make the process more productive and efficient. There are a large number of agricultural tools used by the farmers for cultivation.

Following are the different types of agricultural tools used in farming:

Plough

It is usually derived from wood and is pulled by two bulls. It has been used since ancient times for tiling, turning the soil and adding fertilizers. It consists of a long wooden log called ploughshaft. It has a strong triangular iron strip known as a ploughshare. The other end is connected to a beam that is then placed on the bull’s neck. However, the wooden ploughs are now substituted by iron ploughs and it is drawn by tractors.

Hoe

Hoe has been used since ancient times for cultivation purposes. It consists of a long rod of wood and is pulled by the animals. It is pulled by the animals and is used for loosening the soil and removing weeds. It has a strong, broad, bent plate of iron which works as a blade.

Cultivator

A plough attached to a tractor is called a cultivator. This reduces labour and saves time. It stirs the soil around the maturing crop to promote growth and destroy weeds.

Seed Drill

This is used for sowing seeds. This is done with the help of tractors. It makes sure that the seeds are sown at equal distances and depths and are covered with the soil. This allows plants to receive sufficient sunlight, nutrients, and water from the soil. This saves labour, time and protects the seeds from being eaten by birds or other animals.

Traditional Tool

The traditional tool for sowing seeds is shaped like a funnel. The funnel is filled with seeds. The seeds are passed through two or three pipes with sharp ends. These ends enter into the soil and the seeds are placed there. Sickle, spade, axe, are some of the traditional agricultural implements used by the farmers. It is a labour and time-intensive agriculture practice.