Protected Agriculture Hydroponics and Organic Cultivation — DU B.Sc. (Hons.) Botany Previous Year Question Papers

(a) What are the common pests in hydroponic farming? What metliods can be employed to manage them effectively? (b) What are plant growth regulators? What role do they play in plant development? (c) What is the purpose of growth media in hydroponic systems? How do they assist in plant development in soilless farming? (d) What are biofertilizers? How do they enhance soil fertility and promote plant growth? Hydroponics And Organic 5. Answer any two of the following: (7.5 x 2=15) (a) What is your understanding of protected agriculture? In what ways does it differ from traditional agricultural practices? What are the advantages and disadvantages of protected agriculture systems? (b) (c) How do marketing cllallenges and government policies influence the implementation and success of protected agriculture practices? Explain the different types of hydroponic systems. What are the advantages and disadvantages of each system? 2. 3. Attempt four questions in all, including Question Number 4. 5. All parts of a question must be answered together Draw neat and well labelled diagrams wlierever required 1. (a) Expand the following (any five): (1x5=5) (iii) GAP (b) Explain briefly: (i) Protected Agricultui.e (iv) Pheromone trapping (c) Fill in the blanks: (i) ........... is a plant hormone that primarily promotes cell elongation in plant shoots and roots. (ii) An air pump in hydroponic systems is used to circulate ......... into the nutrient solution. (iii) The unit of measurement for light is ............... (iv) In ........., plants are grown witli their roots exposed to a thin film of nutrient solution that continuously supplies essential nutrients. (v) ............. is a method of pest management that uses natural enemies, pathogens, or other organisms to suppress or reduce pest populations. 2. Write short notes on any five of the following : (a) Role of cytokinin in plant growth (b) Integrated Pest Management (c) Government policies related to protected agriculture (D Nutrient film technique, with its advantages and limitations. 3. Differentiate between any three of the following: (a) Physical parameters and Chemical Parameters for Plant Growth (b) Deep Water Culture and Dutch Bucket System (c) Organic farming and Natural farming (d) Biopesticides and Biocontrol agents 4. Answer the following (any three): (5x3=15)