| 1571972 |
Harvesting |
Lettuce harvest using field pack operation. Handling of individual heads occurs only in the field. February 1996 |
| 1572604 |
People |
Group of workers walk a field of lettuce, inspecting it for ...? January 1997 |
| 1572602 |
Equipment |
Lettuce coming out of a hydrocooler. January 1997 |
| 1572502 |
Root(s) |
Lettuce roots exposed to determine any damage from sudangrass residue. None detected. November 1996 |
| 1572409 |
Planting |
|
| 1572396 |
Seed(s) |
Pelleted lettuce seeds near a crack in the soil. Soil cracking can affect lettuce stand establishment. (sudangrass allelopathy experiment). October 1995 |
| 1572395 |
Seed(s) |
Pelleted lettuce seeds near a crack in the soil. Soil cracking can affect lettuce stand establishment. (sudangrass allelopathy experiment). October 1995 |
| 1571627 |
Seedling(s) |
Stand establishment in lettuce is a critical time. Soil cracking along the seedline can break seedling roots and result in stand reduction. October 1995 |
| 1572198 |
Harvesting |
Lettuce harvest and transport in the early 1900s. |
| 1572197 |
Facility |
Lettuce packing in the early 1900s. |
| 1571775 |
Demonstration |
Lettuce growers inspect the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. UC Vegetable Crops Farm Advisor Keith Mayberry at far left. January 1996. |
| 1571806 |
Field |
Field of butternut lettuce ready for harvest. January 1996 |
| 1571805 |
Field |
Field of butternut lettuce ready for harvest. January 1996 |
| 1571782 |
Stem(s) |
Stem of lettuce seeding shows discoloration at the point of contact with sudangrass residue. An indication of allelopathy of sudangrass to lettuce? January 1996 |
| 1571779 |
Demonstration |
Lettuce growers inspect the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. UC Farm Advisor Keith Mayberry at far left. January 1996. |
| 1571778 |
Demonstration |
A lettuce grower inspects the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. January 1996. |
| 1571777 |
Demonstration |
Lettuce growers inspect the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. UC Plant Pathology Farm Advisor Gerald Holmes at far left. January 1996. |
| 1571776 |
Demonstration |
Lettuce growers inspect the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. UC Farm Advisor Keith Mayberry at far left. January 1996. |
| 1571774 |
Display or Sign |
Lettuce growers inspect the features of head lettuce varieties to determine their suitability for production and the marketplace at a University of California lettuce field day. UC Farm Advisor Gerald Holmes in the foreground. January 1996. |
| 1571772 |
Plant(s) |
Lettuce growers inspect the features of a head lettuce plant to determine its suitability for production and the marketplace. January 1996. |
| 1571735 |
Demonstration |
University of California Field Day showcasing lettuce varieties. December 1995 |
| 1571651 |
Plant(s) |
Soil crack moves to seedline and causes stand reduction. November 1995 |
| 1572576 |
Plant(s) |
Iceberg lettuce head ready for harvest. January 1997 |
| 1572575 |
Product |
Final packed carton showing one unwrapped head. January 1997 |
| 1572574 |
Plant(s) |
Iceberg lettuce head ready for harvest. January 1997 |
| 1572573 |
Harvesting |
Field packing lettuce. January 1997 |
| 1572570 |
Product |
Field packing lettuce. January 1997 |
| 1572571 |
Product |
Field packing lettuce. January 1997 |
| 1572572 |
Processing |
Field packing lettuce. January 1997 |
| 1572569 |
Product |
Field packing lettuce. January 1997 |
| 1572408 |
Seedling(s) |
Thinned lettuce seedlings. October 1996 |
| 1571973 |
Harvesting |
Lettuce harvest using field pack operation. Handling of individual heads occurs only in the field. February 1996 |
| 1571970 |
Harvesting |
Lettuce harvest using field pack operation. Handling of individual heads occurs only in the field. February 1996 |
| 1571971 |
Harvesting |
Lettuce harvest using field pack operation. Handling of individual heads occurs once, in the field. February 1996 |
| 1571969 |
Field |
Lettuce varieity trial conducted by University of California scientists. February 1996 |
| 1571801 |
Cultivar |
Field of mixed lettuce. January 1996 |
| 1571802 |
Cultivar |
Field of mixed lettuce. January 1996 |
| 1571784 |
Plant(s) |
Lettuce field after harvest shows the amount of plant residue left for incorporation into soil. January 1996 |
| 1571780 |
Field |
Lettuce variety trial conducted by the University of California. January 1996 |
| 1571771 |
Plant(s) |
Key industry personnel inspect lettuce varieties during a lettuce variety field day. January 1996 |
| 1571736 |
Demonstration |
Iceberg lettuce variety field day. December 1995 |
| 1571652 |
Cultivation |
Thinning lettuce. November 1995 |
| 1571650 |
Plant(s) |
Soil crack moves to seedline and causes stand reduction. November 1995 |
| 1571649 |
Plant(s) |
A depression made in the soil surface will forcing soil cracking away from seedline where it will not damage seedling roots. November 1995 |
| 1571648 |
Plant(s) |
Lettuce plants being thinned and weeded by hand using a specialized hoe. November 1995 |
| 1571647 |
Plant(s) |
Lettuce plants after thinning. November 1995 |
| 1571636 |
Seed(s) |
Radicle from germinating lettuce seed was unable to make sufficient contact with soil and died. This can be a significant problem during high temperatures at planting such as occurs in Yuma, AZ and the Imperial Valley of CA. August 1995 |
| 1571635 |
Seed(s) |
Radicle from germinating lettuce seed was unable to make contact with soil and died. This can be a significant problem during high temperatures at planting such as occurs in Yuma, AZ and the Imperial Valley of CA. August 1995 |
| 1571633 |
Seed(s) |
Radicle from germinating lettuce seed was unable to make contact with soil and died. This can be a significant problem during high temperatures at planting such as occurs in Yuma, AZ and the Imperial Valley of CA. August 1995 |
| 1571632 |
Seed(s) |
Radicle from germinating lettuce seed was unable to make contact with soil and died. August 1995 |
| 1571630 |
Plant(s) |
Lettuce seedlings emerging and causing a crack in the soil. Note the sudangrass residue above seedlings (sudangrass allelopathy experiment). August 1995 |
| 1571629 |
Plant(s) |
Lettuce seedling emerging and causing a crack in the soil. August 1995 |
| 1571626 |
Seedling(s) |
Lettuce seedlings. August 1995 |
| 1571616 |
Seed(s) |
Soil cracks along the seeding line can reduce stand establishment in lettuce. October 1995 |
| 1571005 |
Harvesting |
Iceberg lettuce harvest. Heads are cut, bagged and boxed in the field. In this photo the harvester is cutting lettuce at the base of the plant using a special lettuce knife; February 1995 |
| 1571006 |
Harvesting |
Iceberg lettuce harvest. Heads are cut, bagged and boxed in the field. In this photo the harvester is placing the cut lettuce head into a plastic bag; February 1995 |
| 1571007 |
Harvesting |
Iceberg lettuce harvest. Heads are cut, bagged and boxed in the field. In this photo the entire operation is visible. Harvesters select heads that are ready for harvest, cut them off at the base, remove wrapper leaves, place the cut lettuce head into a plastic bag and leave the bagged lettuce on top of the bed to be picked up by the harvesting rig following behind. The harvesting rig will pack the lettuce into cartons and place onto pallets for immediate transport to cold storage; February 1995 |
| 1571008 |
Harvesting |
Iceberg lettuce harvest. Heads are cut, bagged and boxed in the field. In this photo the harvester is placing the cut lettuce head into a plastic bag; February 1995 |
| 1571039 |
Harvesting |
Harvesting lettuce for processing. Processing lettuce is handled in bulk because it will be processed for various markets at a processing facility. Fresh market lettuce is packed in the field and requires much more labor. March 1995 |
| 1571040 |
Harvesting |
Harvesting lettuce for processing. Processing lettuce is handled in bulk because it will be processed for various markets at a processing facility. Fresh market lettuce is packed in the field and requires much more labor. March 1995 |
| 1571041 |
Harvesting |
Harvesting lettuce for processing. Processing lettuce is handled in bulk because it will be processed for various markets at a processing facility. Fresh market lettuce is packed in the field and requires much more labor. March 1995 |
| 1571042 |
Harvesting |
Harvesting lettuce for processing. Processing lettuce is handled in bulk because it will be processed for various markets at a processing facility. Fresh market lettuce is packed in the field and requires much more labor. March 1995 |
| 1571004 |
Harvesting |
Iceberg lettuce harvest. Heads are cut, bagged and boxed in the field; February 1995 |
| 1570852 |
Equipment |
Tool used for seedling toxicity assay. Soil in tube is a profile of the planted bed. Lettuce seeds are placed in narrow slit in tube and germination measured. This will show if the soil profile has areas that are toxic to lettuce seedlings. October 1994 |
| 1570853 |
Equipment |
Tool used for seedling toxicity assay. PVC tube is used to extract a soil profile in the affected area. Soil in tube is a profile of the planted bed. Lettuce seeds are placed in narrow slit in tube and germination measured. This will show if the soil profile has areas that are toxic to lettuce seedlings. October 1994 |
| 1570854 |
Equipment |
Tool used for seedling toxicity assay. PVC tube is used to extract a soil profile in the affected area. Soil in tube is a profile of the planted bed. Lettuce seeds are placed in narrow slit in tube and germination measured. This will show if the soil profile has areas that are toxic to lettuce seedlings. October 1994 |
| 1570981 |
Field |
Note the difference in water retention. January 1995 |
| 1570988 |
Research |
Variety trial
January 1995
|
| 1570850 |
Field |
Field of emerging lettuce shows repeating pattern (green stipes) running perpendicular to beds. October 1994 |
| 1571037 |
Field |
Lettuce debris left in field after harvest. March 1995 |
| 1571038 |
Field |
Lettuce debris left in field after harvest and disking. March 1995 |
| 1570883 |
Field |
Field patterns during stand establishment reveal spatial variation in conditions for lettuce growth and development. November 1994 |
| 1570887 |
Plant(s) |
Lateral roots on lettuce seedling are few and many with blackened tips. Soil toxin suspected (e.g., fertilizer injury, allelopathic crop residue). November 1994. |
| 5365662 |
Harvesting |
Farm workers harvesting lettuce in the field. |
| 5365661 |
Harvesting |
Farm workers harvesting lettuce in the field. |
| 5365660 |
Field |
A leaf lettuce field in Colorado. |
| 5365659 |
Field |
A leaf lettuce field in Colorado. |
| 5364492 |
Plant(s) |
Some young lettuce plants growing in the field. |
| 5364491 |
Plant(s) |
A young lettuce plant growing in the field. |
| 5364490 |
Plant(s) |
A young lettuce plant growing in the field. |
| 5364388 |
Seed(s) |
Lettuce seeds during a seed quality inspection exercise. |
| 5363710 |
Plant(s) |
A leaf lettuce plant growing in the field. |
| 5363709 |
Field |
Lettuce culls left in the field. |
| 5362704 |
Field |
A scenic view of a lettuce field at Delta in Colorado. |
| 5362703 |
Field |
A scenic view of a lettuce field at Delta in Colorado. |
| 5359673 |
Plant(s) |
Lettuce plants growing in the field. |
| 5359672 |
Plant(s) |
Lettuce plants growing in the field. |
| 5358377 |
Plant(s) |
Some young lettuce plants in the field. |
| 5358376 |
Plant(s) |
A scenic view of a field of lettuce. |
| 5357431 |
Plant(s) |
Double row of head lettuce in the field. |
| 5363680 |
Flower(s) |
Flowers on a bolting stalk of lettuce. |
| 5363679 |
Plant(s) |
Lettuce plants bolting into flower. |
