Group the following crops and tabulate them as energy-yielding,protein-yielding,oil-yielding,and fodder crops: Wheat,rice,berseem,maize,gram,oat,pigeon pea,sudan grass,lentil,soybean,groundnut,castor,and mustard.

Name two protein-containing rabi crops.

Find out the correct sentence about manure:
$(i)$ Manure contains large quantities of organic matter and small quantities of nutrients.
$(ii)$ It increases the water holding capacity of sandy soil.
$(iii)$ It helps in draining out of excess of water from clayey soil.
$(iv)$ Its excessive use pollutes environment because it is made of animal excretory waste.

Rajan and his family members were going to Dalhousie in a car to enjoy their weekly holidays. While on the way,it started raining. During the journey,Rajan observed that when another vehicle or bus passed them and honked,the intensity of the sound produced was higher than it would be in an area without rain.
$(a)$ What,according to you,is the reason behind the increase in the intensity of sound during rain?
$(b)$ What value do you attribute to Rajan's observation?

Write the name of a bio-fertilizer.

$(i)$ What are weeds? Give two examples.
$(ii)$ "Removal of weeds from cultivated fields during the early stages of growth of crops is essential for a good harvest." Justify the statement.
$(iii)$ List five preventive methods that help in weed control.