Q18. Take a copper utensil. Now put some quantity of curd in it. After 2 to 3 days, Check your curd.
Now give your observation about changes occurred.
an is an antial nutrient for plant growth. But farmers who cultivate putere
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Curd and sour substances contain acids which react with brass and copper vessels to form poisonous salts which are harmful for our health.
Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilisers during cultivation.
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