Raman lives in a coastal village. He is the son of a fisherman. Whenever any unwanted animal comes in the net,instead of killing it,he puts it back in the sea.
$(a)$ What would have happened,had he killed those animals?
$(b)$ Give one reason to justify that Raman's action is environment-friendly.
$(c)$ How can you contribute to the preservation of flora and fauna around you? Mention any two steps.

Give one word for the following:
$(a)$ Farming without the use of chemicals as fertilizers,herbicides,and pesticides is known as . . . . . . .
$(b)$ Growing of wheat and groundnut on the same field is called as . . . . . . .
$(c)$ Planting soybean and maize in alternate rows in the same field is called as . . . . . . .
$(d)$ Growing different crops on a piece of land in pre-planned succession is known as . . . . . . .
$(e)$ Xanthium and Parthenium are commonly known as . . . . . . .
$(f)$ Causal organism of any disease is called as . . . . . . .

When Ashok visited his village,he observed that villagers were suffering from malnutrition. To curb malnutrition in the village,he suggested they select five or six fish species in a pond. This increased the fish yield from the pond. The villagers were surprised to see the results and asked him to help with the other two ponds in the village.
$(i)$ What name is given to this intensive fish farming?
$(ii)$ Write the basis on which the different fish species are selected.
$(iii)$ Ashok's initiative is worth praising. Give two reasons.

Farmer $X$ planted Soyabean $+$ Maize $+$ Cowpeas in the same field simultaneously in a set row pattern. Farmer $Y$ planted cereal crop in one season and leguminous plants in the next season on the same piece of land in pre-planned succession. $(a)$ Name the cropping patterns used by farmers $X$ and $Y$. $(b)$ State two advantages of the different cropping patterns followed by farmers $X$ and $Y$ respectively.

Which one of the following nutrients is not available in fertilizers?

$(a)$ State two characteristics of a healthy animal.
$(b)$ State any four characteristics of storage structure for grains.