Question

1. What is meant by agricultural practices ?


2. Define amplitude and frequency.


3. What is animal husbandry?


4. What are sounds with frequency greater than 20KHz called?


5. What is weeding?


6. How is sound produced?


7. How are seeds stored after harvesting?


8. Explain Rabi and Kharif crops with examples.


9. Why does our voice echo on hills?


10.What is irrigation? Describe two methods of irrigation which conserve water


11. Differentiate between pitch and loudness.


12. What are the advantages of ploughing the soil before sowing

seeds in it?


13. Describe the characteristics of sound.


14. Describe Nitrogen cycle.


15. What are the main causes of noise pollution?


16. With the help of an activity show that sound cannot travel

through.​

Answer 1

Answer:

Agricultural practices are collection of principles to apply for farm production processes to get better agricultural products and the Agriculture practices are simply practices used in agriculture to facilitate farming. ... Organic farming is an agriculture practice as well as sustainable agriculture.

hope it helps you

thank you

Answer 2

Answer:

1. Agricultural practices are collection of principles to apply for farm production processes to get better agricultural products and the Agriculture practices are simply practices used in agriculture to facilitate farming. ... Organic farming is an agriculture practice as well as sustainable agriculture.
2. Amplitude is an important parameter of waves and is the maximum displacement of points on a wave. Stated another way, amplitude is the vertical distance between a peak or a valley and the equilibrium point. Frequency is the number of wave cycles passing a point per unit time.
3. Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fibre, milk, eggs, or other products. It includes day-to-day care, selective breeding and the raising of livestock.
4. In the case of sound waves, frequency is between 20 Hz and 20,000 Hz. Acoustic waves of frequency smaller than 20 Hz are called infrasounds, and those of frequency greater than 20,000 Hz are called ultrasounds. Neither of them can ordinarily been heard by humans.
5. Weeding is the removal of weeds from the field. ... Hence, weeding has to do before harvesting as it may interfere with growth and harvesting. Weeds can be controlled in many ways. Weed management includes land preparation, water management, hand weeding, hand hoeing, crop rotation, and herbicides.
6. Sound is created when something vibrates and sends waves of energy (vibration) into our ears. The vibrations travel through the air or another medium (solid, liquid or gas) to the ear. The stronger the vibrations, the louder the sound. Sounds are fainter the further you get from the sound source.
7. After harvest, seeds are threshed to remove the seed from the surrounding plant material. A period of air-drying is important before seeds are threshed. ... ... Harvested material should be stored in a well- ventilated room with low humidity.
8. .
9. Rabi crops- wheat, barley, oats, gram, mustard, linseed. Kharif crops- rice, maize, millet, ragi, pulses, soybean, groundnut.
10. echo is heard only when surfaces are far away.it is because the ears cannot distinguish between the two voices when sound is reflected from a nearby surface . This phenomenon is most commonly observed on the hills . The echo is very clear when on hills .
11. Answer: The process of watering the crops is called irrigation. Two methods of irrigation are: (i) Sprinkler system : This system is used on the uneven land where less water is available. ... (ii) Drip irrigation: This system is used to save water as it allows the water to flow drop by drop at the roots of the plants.
12. pitch of a sound is our ear's response to the frequency of sound. Whereas loudness depends on the energy of the wave. ... The pitch of a sound depends on the frequency while loudness of a sound depends on the amplitude of sound waves
13. Plowing the soil buries organic residues from previous crops and volunteer weeds and grasses. These can now decompose and release nutrients for the next crop. The soil gets aerated, softened, and a fine texture for the next seeds to grow in
14. Sound is a longitudinal wave which consists of compressions and rarefactions travelling through a medium. Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed. The minimum distance in which a sound wave repeats itself is called its wavelength
15. Nitrogen Cycle is a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere. It involves several processes such as nitrogen fixation, nitrification, denitrification, decay and putrefaction.
16. Poor Urban Planning. ...
17. Poor Urban Planning. ...Social Events. ...
18. Poor Urban Planning. ...Social Events. ...Transportation. ...
19. Poor Urban Planning. ...Social Events. ...Transportation. ...Construction Activities. ...
20. Poor Urban Planning. ...Social Events. ...Transportation. ...Construction Activities. ...Household Chores. ...
21. Poor Urban Planning. ...Social Events. ...Transportation. ...Construction Activities. ...Household Chores. ...Noise From Air Traffic. ...
22. Poor Urban Planning. ...Social Events. ...Transportation. ...Construction Activities. ...Household Chores. ...Noise From Air Traffic. ...Catering and Nightlife.

there is something error in 16 question because u can't tell from where does it can't travel through

so I am giving the answer it cannot travel through vacuum

Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.