Wednesday, 29 May 2013

29/5/13

Weather:
W winds 44kph
rain - 0.0mm
high 11C low 4C

Today in Plant ID class we discussed weeds. A weed is nothing but a plant out of place. Grass is a weed in your lettuce patch and lettuce is a weed in your lawn....
Generally weeds are strong/vigorous plants that have evolved to thrive in disrupted conditions.
 Some reasons we remove weeds are:

  • unattractive
  • make harvesting your crop dificult
  • Alleopathy- toxins from some plants have a negative effect on the desired crop.
  • competition for light, water, nutrients and pollinators.
  • harbour pest and disease-problem if crop and weed are related species

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