{
    "document_id": 15918,
    "page": 33,
    "width_pt": 612,
    "height_pt": 792,
    "rotation": 0,
    "pipeline_version": "paddleocr-vl-1.6+paul-48",
    "engine": "paddleocr_vl",
    "source_run_id": 16030,
    "item_count": 4,
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    "items": [
        {
            "id": "p33.1",
            "order": 1,
            "type": "text",
            "bbox": {
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            "text": "Trench layering methods. When seedlings had reached the appropriate age post-emergence, they were defoliated, tipped, and transplanted into[p33.1.1] trench layering beds, constructed of untreated lumber on the concrete greenhouse floor, filled[p33.1.2] deep with ProMix-BX, in another glass greenhouse (June 18, 2002 and July 30, 2003). Temperature and light conditions were the same. Seedlings were planted slanting diagonally, so that when the pine bedding was placed on top, they would lay horizontally. Pot tags were placed by the seedlings to indicate the treatment, which had been arranged in a randomized block design, and seedlings were covered with fine pine bedding (Southern States). Seedlings were watered 3 times a week and fertilized once a week with Peters 20-20-20 water soluble fertilizer with micronutrients at a rate of 500 ppm.\nWhen most shoots had emerged and reached approximately 5 leaves, they were subjected to treatment (September 29-30, 2002 and December 2, 2003). The pine bedding was removed from the area around the shoot, and the shoot was wounded by rubbing a small area of the stem circumferentially with sandpaper. A 3-indolebutyric Acid (IBA) solution was prepared by dissolving reagent-grade (water-insoluble) IBA (Sigma-Aldrich, St. Louis, MO) in a small amount of ethanol and diluting with the appropriate volume of double distilled water. The IBA solution was then applied to the wounded area of the shoots using a paintbrush. The shoots were re-covered with the pine bedding after treatment. Light, temperature, irrigation, and fertilization procedures remained the same as before treatment.\nApproximately 12 weeks after treatment, shoots were uncovered to examine for evidence of rooting (December 2, 2002 and March 29, 2004). The pine bedding and ProMix was delicately removed from around each plant, so as not to disturb the root system. Diameter, height, vigor rating, root number and root length were recorded for each shoot.\nExperimental and treatment design. The experimental design for this study was a randomized block, with the three blocks based on temperature variation in the greenhouse. Trench layering beds ran parallel to a cooling pad. There were 15 replicate plants in each treatment included per block in 2002 and 12 plants per treatment per block in 2003. The treatment structure was a 3 x 4 factorial in 2002, with the two main factors",
            "attrs": {
                "block_label": "abstract"
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            "children": [
                {
                    "id": "p33.1.1",
                    "order": 2,
                    "type": "text",
                    "bbox": {
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                    "text": "5 m × 2 m × 0.5 m",
                    "attrs": {
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                        "text_offset": 139,
                        "text_span": 9,
                        "bbox_estimated": true
                    }
                },
                {
                    "id": "p33.1.2",
                    "order": 3,
                    "type": "text",
                    "bbox": {
                        "l": 106.56,
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                    "text": "30 cm",
                    "attrs": {
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            "type": "footer",
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            "text": "21",
            "attrs": {
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        }
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    "excluded_furniture": {
        "first": [],
        "last": []
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}