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Improvement in Food Resources — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceImprovement in Food Resources2 Marks
Question
What are fertilizers? Classify fertilizers.
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Answer

Fertilizers: Fertilizers are one of the major components for obtaining higher yields especially in expensive.

farming practices. Fertilizers are divided into following four groups:

  1. Nitrogenous fertilizers: These fertilizers supply the macronutrient nitrogen.

Example: Urea, CO(NH2)2.

  1. Potassic fertilizers: These fertilizers supply potassium which is one of the essential macronutrient of the plants.

Example: Potassium sulphate, K2SO4.

  1. Complex fertilizers: These fertilizers contains two or more nutrients.

Example: Nitrophosphate.

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