Effect of Timing of Harvest on Onion Yield

  • Slides: 29
Download presentation
Effect of Timing of Harvest on Onion Yield and Storability Clint Shock Erik Feibert

Effect of Timing of Harvest on Onion Yield and Storability Clint Shock Erik Feibert Oregon State University Malheur Experiment Station Ontario, Oregon

Acknowledgements: IEOOC Onion Seed Companies Irrometer Co. Western SARE This project was partially funded

Acknowledgements: IEOOC Onion Seed Companies Irrometer Co. Western SARE This project was partially funded by the Western Sustainable Agricultural Research and Education Program, the Idaho- Eastern Oregon Onion Committee, Irrometer Co. cooperating seed companies, and Oregon State University.

In Treasure Valley: Most onions marketed out of storage from October through March

In Treasure Valley: Most onions marketed out of storage from October through March

Purpose: To evaluate and document current grower harvest practices Justification: - Few studies in

Purpose: To evaluate and document current grower harvest practices Justification: - Few studies in literature - Only study at Malheur Experiment Station was done in 1985

Constraints on harvest timing and field curing ? - Air temperature - Relative humidity

Constraints on harvest timing and field curing ? - Air temperature - Relative humidity - Precipitation

66 -year average precipitation at Ontario: August: 0. 34 inch September: 0. 45 inches

66 -year average precipitation at Ontario: August: 0. 34 inch September: 0. 45 inches

Collapsed onion top used as indicator of time to undercut to initiate field curing

Collapsed onion top used as indicator of time to undercut to initiate field curing At what percentage of tops down should onions be undercut to achieve highest yield and storability?

Planting date: - March 19, 2009 No effect of irrigation treatment on onion response

Planting date: - March 19, 2009 No effect of irrigation treatment on onion response to harvest timing

Onion harvest timing (undercutting) in 2009: August 13 August 20 August 27 September 3

Onion harvest timing (undercutting) in 2009: August 13 August 20 August 27 September 3 September 10 Last drip irrigation September 5

Sampling procedure: One sample from every plot of each variety Bulbs were topped, placed

Sampling procedure: One sample from every plot of each variety Bulbs were topped, placed in burlap bags, left to cure on bare ground for 1 week Percentage of tops down rated at each sampling

Following 1 week of curing: Samples graded, placed in cooler at 34 o. F

Following 1 week of curing: Samples graded, placed in cooler at 34 o. F Each month, starting in late October: - samples weighed - decomposed bulbs removed - samples re-weighed - placed back in cooler

Conclusions: Vaquero and Joaquin: - Yield increased as tops went down -Yield increased until

Conclusions: Vaquero and Joaquin: - Yield increased as tops went down -Yield increased until the last harvest, one week after last irrigation

Final packout was highest for onions harvested at highest percent tops down (last harvest)

Final packout was highest for onions harvested at highest percent tops down (last harvest) Percent tops down at last harvest: Vaquero 90% Joaquin 30%

The 2009 harvest timing trial results are similar to the 2008 harvest timing trial

The 2009 harvest timing trial results are similar to the 2008 harvest timing trial results. In both years, for the drip irrigated onions, yield at harvest and storability increased for Vaquero and Joaquin as tops went down.

Thank you

Thank you

Theoretical Yield Percent Yield Theoretical Yield Percent YieldTheoretical Yield Percent Yield Theoretical Yield Percent Yield
Harvest Time Why is harvest celebrated Harvest FestivalHarvest Time Why is harvest celebrated Harvest Festival
2012 Paddy yield Straw 2013 Harvest Paddy yield2012 Paddy yield Straw 2013 Harvest Paddy yield
Finding Theoretical Yield and Percent Yield Theoretical YieldFinding Theoretical Yield and Percent Yield Theoretical Yield
Percent Yield Theoretical Yield The theoretical yield isPercent Yield Theoretical Yield The theoretical yield is
PERCENT YIELD Percentage Yield n Actual yield AYPERCENT YIELD Percentage Yield n Actual yield AY
SUSTAINABLE YIELD SUSTAINABLE YIELD Sustainable yield is theSUSTAINABLE YIELD SUSTAINABLE YIELD Sustainable yield is the
ONION DOMES onion dome noun Architecture a bulbousONION DOMES onion dome noun Architecture a bulbous
ONION Review 1206 The ONION ONtologies In ONtologyONION Review 1206 The ONION ONtologies In ONtology
ONION Review 1206 The ONION ONtologies In ONtologyONION Review 1206 The ONION ONtologies In ONtology
Unit 1 Onion Introduction Business Characteristics Onion AlliumUnit 1 Onion Introduction Business Characteristics Onion Allium
Onion Important Pests Introduction Onion does not haveOnion Important Pests Introduction Onion does not have
Timing Analysis 11242020 1 Why Timing Analysis timingTiming Analysis 11242020 1 Why Timing Analysis timing
Timing Diagram and Communication Diagram TIMING DIAGRAM TimingTiming Diagram and Communication Diagram TIMING DIAGRAM Timing
Timing Diagram and Communication Diagram TIMING DIAGRAM TimingTiming Diagram and Communication Diagram TIMING DIAGRAM Timing
Onion Harvest Postharvest Introduction A number of mistakesOnion Harvest Postharvest Introduction A number of mistakes
Raman Effect Raman Effect SmekalRaman Effect Raman EffectRaman Effect Raman Effect SmekalRaman Effect Raman Effect
Substitution Effect Income Effect Price Effect Substitution EffectSubstitution Effect Income Effect Price Effect Substitution Effect
HARVEST GROUP Smart Grid Harvest Power Technologies 30HARVEST GROUP Smart Grid Harvest Power Technologies 30
POST HARVEST DISEASES OF CHILLIES Post harvest diseasesPOST HARVEST DISEASES OF CHILLIES Post harvest diseases
What Is Harvest Harvest is a collection ofWhat Is Harvest Harvest is a collection of
Harvest Ministry org Daring Daughters org Harvest MinistryHarvest Ministry org Daring Daughters org Harvest Ministry
Harvest of the Month Sign Templates Harvest ofHarvest of the Month Sign Templates Harvest of
Late Harvest Late harvest is a term appliedLate Harvest Late harvest is a term applied