sources of food new

Description

harith and habib 3T7
Muhammad Noor
Mind Map by Muhammad Noor, updated more than 1 year ago
Muhammad Noor
Created by Muhammad Noor over 7 years ago
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Resource summary

sources of food new
  1. crops
    1. sunlight
      1. water
        1. Air
          1. required for growth
            1. regulated by plant horemones
              1. Also used in ripening of fruit
                1. Weed killers
            2. biological control
              1. natural enemies
              2. chemical control
                1. herbicides
                  1. pesticides
                    1. cause pollution
                      1. air and water pollution
                  2. Soil
                    1. fertilisers
                      1. nutrients
                      2. Appropriate PH
                        1. Litmus paper,universal indicator, pH meter
                    2. Need to be increased due to
                      1. Space limtation
                        1. Increase in world population
                        2. can be increased by
                          1. intensive production methods
                            1. improving plant and animal varieties
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