Raj's farm soil is not fertile. He needs to add nutrients but he hates chemicals. Which of the following do you think he should choose?

Weeds

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Manure

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Seeds

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Fertiliser

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Solution

The correct option is B Manure
Manures are natural substances like plant and animal wastes that are added to the soil to provide them with nutrients.
Fertilisers on the other hand are man-made susbtances that also provide nutrients to the soil but are full of chemicals.
So, inorder to provide nutrients to the soil without adding chemicals, Raj should choose manure.

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Bholu wants to grow plants inside his house but he does not like the mess soil makes. So, Bholu uses a technique called hydroponics. In this technique, plants are grown without soil and instead receive nutrients from mineral-rich water that is made to flow over the plant's roots as shown below. The water needs to be dissolved with chemicals containing plant nutrients such as nitrogen, potassium, and zinc.

Choose the option that best depicts the relative amount of nutrients that need to be added to the water. (A bigger circle means more amount and vice versa; if a circle is not present, means that the nutrient is not added ).

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