Post Harvest Technology and Value Addition
Lecture notes covering post-harvest losses, handling, storage, processing, packaging, value addition, and enterprise policy as per ICAR 6th Deans' Committee 2026. Course Code: ELEC 21 | Credits: 4(3+1).
Frequently Asked Questions
What is post-harvest technology in agriculture?
Post-harvest technology refers to the science and management of produce after harvest, including handling, grading, storage, packaging, transport, processing, and shelf-life protection to reduce losses and preserve quality.
What topics are covered in ELEC 21 Post Harvest Technology and Value Addition?
This elective usually covers post-harvest physiology, losses, maturity indices, handling, storage, cold chain, controlled and modified atmosphere systems, processing, packaging, value addition, infrastructure, and post-harvest entrepreneurship.
Why are respiration, transpiration, and ethylene important after harvest?
They are important because harvested produce remains biologically active. Respiration, transpiration, and ethylene influence ripening, softening, water loss, senescence, and ultimately shelf life and market quality.
What is the difference between controlled atmosphere and modified atmosphere storage?
Controlled atmosphere storage uses deliberately managed gas levels in storage to slow deterioration, while modified atmosphere systems rely on a changed internal atmosphere around the produce, often through packaging or semi-controlled storage conditions.
Why is the cold chain important in post-harvest management?
The cold chain is important because temperature control is one of the strongest tools for slowing deterioration, reducing microbial growth, preserving quality, and extending shelf life from harvest to market.
How is value addition different from simple storage?
Storage mainly aims to preserve produce quality for longer use or sale, while value addition transforms produce into higher-value forms such as dried, canned, fermented, processed, or convenience products that can improve income and reduce waste.
Why is packaging important in post-harvest technology?
Packaging is important because it protects produce from injury, contamination, moisture loss, and handling damage while also supporting storage, transport, and market presentation.
Why do students study post-harvest infrastructure and policy in this elective?
Because post-harvest improvement is not only a laboratory topic. Pack houses, cold stores, logistics, food parks, and policy support determine whether technical improvements can actually work at commercial scale.
How should I prepare Post Harvest Technology and Value Addition for exams?
A strong approach is to follow the chain from physiology to handling to storage to processing to business. That makes the subject easier because each topic becomes part of one value-creation sequence rather than isolated facts.