Post-Harvest Technology

This section usually covers causes of post-harvest losses, preservation principles, processing of fruits and vegetables, jam and jelly basics, TSS and pectin, cold storage, packaging, and ripening-related concepts.

It is important because it connects production with storage, value addition, shelf life, and food quality. Students are often asked direct questions from preservation methods and processed-product terminology.

Jam is prepared from fruit pulp or crushed fruit, while jelly is prepared from clear fruit extract. This is one of the most common and fastest-scoring distinctions in post-harvest revision.

TSS means total soluble solids and is commonly expressed in degrees Brix. In exam preparation it is used as a quality and concentration indicator for products such as jam, jelly, squash, and syrup.

Pectin is important because it helps form the gel structure of products like jam and jelly. Students are often asked to connect pectin, sugar, and acidity with proper setting.

The main methods usually include high-temperature processing, low-temperature storage, drying and dehydration, chemical preservation, fermentation, and better packaging and hygiene practices.

Pre-cooling removes field heat soon after harvest, while the cold chain helps maintain suitable temperature through storage and transport. Both reduce quality loss and extend shelf life.

Modified atmosphere packaging changes the gas environment around produce inside a package, while controlled atmosphere storage manages gases more precisely in a storage system. Students usually need the concept, not advanced engineering detail.

Most students revise this section fastest with short comparison tables for jam versus jelly, preservation methods, storage types, and key terms like pectin, Brix, pre-cooling, and ethylene.