List any five chemical fertilizers rich in nitrogen.

True/ False In organic farming chemical fertilizers are used.

Do you think it is better to use compost instead of chemical fertilizers ?Why ?

A farmer has a supply of chemical fertilizer of type A which contains 10 % nitrogen and 6% phosphoric acis and type B fertilizer which contains 5% nitrogen and 10% phosphoric acid. After testing the soil condition of a field, it is found that at least 14 kg of nitrogen and 14 kg of phosphoric acid are required for a good crop. The fertilizer type A costs Rs 5 per kg and type B Rs 3 per kg. How many kilograms of each fertilizer should be used to meet the requirements and the cost be minimum? Using LPP, solve the above problem graphically.

What are the uses of chemical fertilizers ?

Why are biofertilizers or biopesticides prefered to chemical fertilizers or pesticides?

How can microorganisms be used to decrease the use of chemical fertilizers and pests ?

List any four alcoholic beverages.

All the substance listed below are fertilizers that contribute nitrogen to the soil. Which of these is the richest source of nitrogen on a mass percentage basis ? a) Urea b) Ammonia

List any two false fruits.