ESTABLISHMENT OF WOODY PLANTS BY DIRECT SEEDING IN CALIFORNIA

MORE THAN 50 SPECIES OF WOODY PLANTS WERE SUCCESSFULLY ESTABLISHED UNDER NONIRRIGATED CONDITIONS BY DIRECT SEEDING AT ONE OR MORE OF 23 LOCATIONS. AN ANNUAL RAINFALL OF 10 INCHES OR MORE, WELL DISTRIBUTED DURING THE RAINY SEASON IS NEEDED TO ASSURE ADEQUATE STANDS OF ADAPTED SPECIES. MAN AND OTHER ANIMALS WERE THE CAUSE OF HALF THE LOSSES. SPOT SEEDING (A 4-INCH-DEEP HOLD WITH FERTILIZER) WAS THE MOST EFFECTIVE METHOD TESTED. BROADCASE SEEDING (HYDROMULCH SEEDING) WAS SUCCESSFUL FOR A LIMITED NUMBER OF SPECIES IN ROUGH AND LOOSE SURFACE SOIL. SEEDS OF MANY SPECIES MUST BE TREATED TO OVERCOME VARIOUS SEED DORMANCIES TO INSURE GERMINATION THE FIRST SEASON. WEED CONTROL (HERBICIDE OR MULCH) REDUCED COMPETITION FOR MOISTURE, NUTRIENTS, AND SUNLIGHT, AND LOSS FROM FIRE. IRRIGATION INCREASED THE NUMBER OF SPECIES THAT COULD BE GROWN AT A LOCATION, AND THE SURVIVAL AND GROWTH OF ADAPTED SPECIES (1.5 QUARTS AT SEEDING AND ONCE EACH SUMMER MONTH AT THE SEED SPOT). COST ESTIMATES RANGED FROM $.25 TO $3.60 PER SEED SPOT FOR SEEDING AND MAINTENANCE THROUGH ONE GROWING SEASON. THIS IS 5 TO 70% OF THE ESTIMATED COST OF PLANTING AND MAINTAINING A 1-GALLON PLANT.

  • Corporate Authors:

    California Division of Highways

    Bridge Department
    Sacramento, CA  United States  05914

    University of California, Davis

    Pavement Research Center, One Shields Avenue
    Davis, CA  United States  95616

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Chan, F J
    • Harris, R W
    • Leiser, A T
    • Paul, J L
    • Fissel, R E
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00204646
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: F-5-2
  • Files: TRIS, USDOT
  • Created Date: Jun 18 1972 12:00AM