Post-harvest handling of seeds in lab.pptx

seed handling and care

1. Welcome 1

2. 2 Presenter-Dinesh Choudhary Registration no- 12804 Department- Seed science & technology

3. Topic Name: Post-harvest handling of seeds 3

4. Seed Processing Seed processing means improving the quality of harvested seed, including several operations starting from harvesting of seed crop till its marketing 4

5. Objectives of Seed Processing ▶ To improve seed quality through removal of Dieses affected seed, non- seed material, broken seeds ▶ To maintain seed viability and vigour ▶ To Make seed handling easy ▶ To increase real value of seed Real value = Purity (%) × Germination (%) 100 5

6. Steps for Seed Processing ▶ Seed Drying ▶ Seed Cleaning ▶ Seed Grading ▶ Seed Packaging ▶ Seed Labeling 6 ▶ Seed storage

7. 1. Seed Drying Reduction in seed moisture content to a safer limit is called seed drying ▶ I ts objective is to maintain seed viability and seed vigour for longer period of time during storage ▶ I f moisture contents are high, then higher chances of insect pests attack 7

8. Types of Seed Drying ▶ 1. Natural Drying Seeds are spread uniformly at neat and clean place and dry under natural conditions i.e under sun ▶ 2. Artificial Drying Different artificial driers are used to dry seeds Bag Driers Box Driers Bin Driers Continuous Flow Tower 8

9. 2. Seed Cleaning Separation of physical impurities or removal of non seed material from seed Wet Cleaning Dry Cleaning 9

10. 3. Seed Grading Removal of under sized / under weight seeds from seed lot Grading is done on the basis of ▶ Length ▶ Width ▶ Thickness ▶ Density of seed 10

11. 4. Seed Packaging ▶ Seeds are packed in bags of appropriate quality and size. ▶ Choice of packing material depends upon type of crop, amount of seed and storage conditions Packaging materials are three types: ▶ Moisture- vapour resistance, e.g polythene ▶ Moisture- vapour permeable, e.g cloth,paper bags ▶ Moisture- vapour proof, e.g Tin cans 11

12. 5. Seeds Labelling All seed bags must carry printed information about ▶ Crop ▶ Variety ▶ Class of seed ▶ Name & address of producer ▶ Physical purity (%) ▶ Genetic purity (%) ▶ Moisture (%) ▶ Germination (%) ▶ Percentage of germination ▶ Date of test ▶ Net Content 12

13. Some seed producing Organization 13

14. Seed dryer 14

15. Scalper 15

16. 16

17. Indent cylinder 17

18. Seed treater 18

19. Automatic weighing and packaging machine 19

20. Thank You 20