Question

A farmer, Deepa, was very happy with the harvest of amla (Indian Gooseberry) and lemons on her farm. However, she could sell only one-fourth of the produce in the local market. Recognising that a significant amount of produce may be lost post-harvest, she employed a traditional yet scientifically sound method to extend the shelf life of amla and lemons. She turned perishable produce into profitable products, such as pickles and sharbat. She used the excess produce to prepare pickles, murabbas, and sharbat by adding appropriate amounts of salt, sugar, or jaggery to small pieces of fruit and their juices. These were then stored in small glass bottles for sale, helping her prevent the wastage of post-harvest produce. This shift from farming to agro-processing would strengthen food security and boost the local economy, creating a sustainable model that cuts waste while increasing her income.

Based on the above passage answer the following questions:

1. Which scientific concept has the farmer applied in the preservation of the farm produce?
2. How does the addition of high concentrations of salt and sugar create an environment that prevents the growth of spoilage-causing bacteria and fungi?
3. Suggest a healthy recipe of this kind for food preservation.
4. What are the scientific values addressed in this case?

Answer 1

1. The farmer kept her harvest using the scientific principle of osmosis. She produces a concentrated (hypertonic) environment that maintains the food by adding large amounts of sugar and salt.
2. Microorganisms are surrounded by a hypertonic environment due to high salt and sugar concentrations. Osmosis is the process by which water leaves bacterial and fungal cells. resulting in dehydration, which stops them from growing and spoiling.
3. Healthy amia pickle recipe:
   • Take 500 grams of chopped amla.
   • Add 2 tbsp mustard oil, 1 tbsp turmeric, 1 tbsp red chilli powder, 2 tbsp salt, and 1 tbsp jaggery (instead of extra sugar).
   • Heat the oil, add the spices, and stir in the amla. For a few days, store in a dry, clean glass jar in the sun. This stops microbial development and preserves vitamin C, improving its taste as well.
4. Resource conservation (zero waste) and the application of scientific principles (osmosis for preservation) are examples of scientific values that are discussed. sustainability (food security through agricultural processing), innovation (traditional knowledge with science), economic consciousness, and entrepreneurship.