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California Crop Improvement Association
California Crop Improvement Association
California Crop Improvement Association
University of California
California Crop Improvement Association

Land Requirements

Section 9. Land Requirements

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In all cases the previous crop history must be  known on the field(s) used to produce any class of certified seed.  The field(s) must not have grown another  variety of the same crop for the length of time specified by the individual crop  standards.  Regardless of previous crops,  at the time of planting, the field must be free of volunteer plants of the crop  being produced.  The area adjacent to the  field should also be free of volunteer plants of the crop being produced. The  field or any portion of the field certified must always have a definite  boundary such as a fence, ditch, levee, road, or barren strip. Stakes alone  will not be recognized as an adequate boundary unless these are steel fence  posts or heavy wooden posts placed at 200-foot intervals and tall enough to be  seen above the crop.

Fields to be planted  for certification should be free from all prohibited noxious weeds as  designated by the Director of California Department of Food and Agriculture  (CDFA) and those weeds specifically named in CCIA’s individual crop standards.

9.1       Prohibited Noxious Weed Seed List. Seed or propagules  of the following species of plants have been named prohibited noxious weed seed  within the meaning of Section 52257 of the California Food and Agricultural  Code:

  Scientific Name
Alhagi  pseudalhag
Cardaria  chalepensis
Cardaria  draba
Cardaria  pubescens
Carduus  acanthoides
Carduus  nutans
Carthamus  leucocaulos
Centaurea repens
Cirsium  arvense
Cirsium  undulatum
Cucumis  melo var. dudaim
Euphorbia  esula
Helianthus  ciliaris
Lepidium  latifolium
Onopordum  spp.
Rorippa  austriaca
Solanum  carolinense
Solanum  elaeagnifolium
Sonchus  arvensis
Common Name
   (camelthorn)
   (lens-podded  hoary cress)
   (heart-podded  hoary cress)
   (globe-podded  hoary cress)
   (plumeless  thistle)
   (musk  thistle)
   (whitestem  distaff thistle)
   (Russian  knapweed)
   (Canada  thistle)
   (wavyleaf  thistle)
   (dudaim melon)
   (leafy  spurge)
   (blueweed)
   (perennial  pepperweed)
   (onopordum  thistles)
   (Austrian fieldcress)
   (Carolina  horsenettle)
   (white  horsenettle)
   (perennial  sowthistle)

9.2      Restricted Noxious Weed Seed List. The fields should  also be free from those restricted noxious weeds apt to be difficult to  separate from the crop seed.  Seed or  propagules of the following species of plants have been named restricted  noxious weed seed by the Director of CDFA within the meaning of Section 52258  of the California Food and Agricultural Code:

  Scientific Name
Agropyron repens
Allium  vineale
Carduus  pycnocephalus
Carduus  tenuiflorus
Carthamus  baeticus
Carthamus  lanatus
Cenchrus  echinatus
Cenchrus  incertus
Cenchrus  longispinus
Centaurea  solstitialis
Chorispora  tenella
Convolvulus  arvensis
Cuscuta spp.
Cyperus  esculentus
Cyperus  rotundas
Elymus caput-medusa
Halogeton  glomeratus
Hypericum  perforatum
Salvia  aethiopis
Sorghum  halepense

Tribulus  terrestris
Common Name
 (quakgrass)
 (wild  garlic)
 (Italian  thistle)
 (slenderflowered thistle)
 (smooth  distaff thistle)
 (woolly  distaff thistle)
 (southern  sandbur grass)
 (coast  sandbur grass)
 (mat  sandbur grass)
 (yellow  starthistle)
 (purple  mustard)
 (field  bindweed)
 (dodder)
 (yellow  nutgrass)
 (purple nutgrass)
 (medusahead)
 (halogeton)
 (Klamathweed)
 (Mediterranean  sage)
 (Johnsongrass  and other perennial Sorghum spp. including but not limited to Sorghum almum and perennial sweet  sudangrass)
 (puncture  vine)

9.3      Isolation Requirements. Isolation  requirements must be met as specified in the individual crop standards.  If there is a dispute where two applicants  cannot mutually agree on isolation involving their certified seed fields, the  field planted last must provide the isolation or be denied certification.  If it is not clear which field was planted  first, the application first received by CCIA shall have priority.

Go to Section 10. Planting the Field

Updated: October 2011

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