Step 1: Understanding kitchen garden practices.
A kitchen garden is a small-scale garden where vegetables, fruits, and herbs are grown for household consumption. The focus is on growing healthy, chemical-free food.
Step 2: Suitable vs. unsuitable materials for kitchen garden.
Compost: Decomposed organic matter that enriches soil naturally. It is ideal for kitchen gardens.
Organic manure: Natural fertilizers from plant or animal sources (cow dung, vermicompost, etc.). They improve soil health without harmful residues.
Chemical fertilizer: Synthetic fertilizers containing concentrated nutrients. They can leave harmful residues in food, degrade soil quality over time, and are not recommended for kitchen gardens where chemical-free produce is desired.
Kitchen waste: Vegetable peels, fruit scraps, etc., can be composted and used as organic fertilizer. They are excellent for kitchen gardens.
Step 3: Analysis of each option.
(A) Compost: This SHOULD be used. Compost is excellent natural fertilizer.
(B) Organic manure: This SHOULD be used. Organic manure enriches soil naturally.
(C) Chemical fertilizer: This should NOT be used. Chemical fertilizers can leave harmful residues in food and damage soil health.
(D) Kitchen waste: This SHOULD be used. Kitchen waste can be composted and used as organic fertilizer.
Final Answer: (C) Chemical fertilizer.