How can poultry farming be integrated with crop production? How are improved poultry breeds developed in poultry farming?

The ration (daily food requirement) for broilers is carbohydrate-rich with adequate minerals.

Mohan and Virender were discussing the following problem: $A$ boy kicks a football high into the air. He runs and catches the football before it hits the ground. Which of the two,the boy or the football,has had greater displacement? Mohan was of the opinion that the football has travelled into the air and back,while the boy and the ball have covered the same displacement. Virender told him that it is not true. Both of them discussed and sorted the matter between them.
$(a)$ Who do you think is right,Mohan or Virender?
$(b)$ What are the values you see in Raman?

$A$ teacher mentioned organisms that enrich the soil with nutrients. Rahila was curious to know more about them. She searched the internet and learned about $Rhizobium$ bacteria and cyanobacteria.
$(i)$ What are bio-fertilizers?
$(ii)$ Explain how any one of the organisms mentioned above enriches the soil with nutrients.
$(iii)$ Why was Rahila curious to get more information?

Chemical formula of a compound is a symbolic representation of its composition. We should know the following points to write the chemical formulae of chemical compounds:
$(i)$ Symbols of the combining elements.
$(ii)$ Valency of the combining elements.
In order to know the valency,we must calculate the valence electrons present in the atoms.
The electrons present in the outermost shell or valence shell are called valence electrons. The number of electrons in the atoms of some elements are given below. The elements which have one valency are called monovalent.
$(a)$ What is a chemical formula?
$(b)$ Which main points we must know to write the chemical formula of compounds?
$(c)$ Which values do we find associated with the use of formula for various things in daily life?

$(i)$ List three factors on which cultivation practices and crop yield depend.
$(ii)$ Name three stages involved in farming practices.