Which one of the following species of honey bee is an Italian species?

Out of boilers and layers,which one is used to produce eggs?

The shorter duration crops help the farmer:

$(a)$ Distinguish between macronutrients and micronutrients on the basis of $(i)$ their functions and $(ii)$ amount required by plants. $(b)$ Classify the following elements as macro or micronutrients in plants: $(i)$ Nitrogen,$(ii)$ Zinc,$(iii)$ Copper,$(iv)$ Potassium. $(c)$ In what way is the deficiency of these nutrients harmful to crops?

Discuss why pesticides are used in very accurate concentration and in a very appropriate manner.

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 excess water from clayey soil.
$(iv)$ Its excessive use pollutes the environment because it is made of animal excretory waste.