Lecture 10a: HARVESTING AND POSTPRODUCTION TECHNOLOGY Flashcards
process of separating the fruit or economic product from the plant
harvesting
harvesting methods -
- priming
- stripping
- tapping
harvesting methods - only mature or ripe fruits or pods are harvested, leaving others for subsequent harvesting
priming
harvesting methods - all fruits in the cluster are harvested once few fruits become ripe or mature
stripping
harvesting methods - extraction of latex
tapping
sign or indication of the readiness of the crop for harvest based on purpose or intended use.
maturity index
corn harvested three days after the silk appears
young corn
corn harvested when milky exudate appears on kernels pierced with a thumbnail
green corn
T or F - commercial maturity of the same crop may vary depending on intended use or purpose
TRUE
harvested when husks are dried, and kernels are glazed
feeds
methods of determining maturity
- visual
- physical
- compositional
- phenological/computational
methods of determining maturity - change in color, shape, size, drying of plant part (onion, garlic)
ex. change in angularity of banana
visual
methods of determining maturity - development of aroma, sound produced by tapping, compactness of head
physical
methods of determining maturity
total soluble solids content
tittrable acidity
starch content
oil contet
compositional
methods of determining maturity - nagbibilang days after shooting/planting/flower
phenological/computational
(compositional - method of determining maturity) more intense blue color indicates high starch content
iodine test
maturity index of rice
100-150 days
maturity index of coconut
11-12 months AF (copra)
8-9 months AF (buko)
maturity index of coffee
berries turning red
maturity index of cacao
160-180 days after fruit setting
maturity index of abaca
18-24 months AP
methods of harvesting
- manual
- manual with aid of conveyor
- mechanical
-tree shaker
-robotic harvesting
pulling, twisting, bending, shaking
manual method of harvesting
encompasses all practices and operations from harvesting to consumption
postproduction technology