Sources of food

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satnam
satnam singh
Mapa Mental por satnam singh, atualizado more than 1 year ago
satnam singh
Criado por satnam singh mais de 7 anos atrás
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Resumo de Recurso

Sources of food
  1. CROPS
    1. Needs Sunlight,Water,Air
      1. HELP IN GROWTH,REGULATED BY PLANT HORMONES ALSO USED IN WEED KILLERS AND RIPENING OF FRUITS
      2. CHEMICAL CONTROL
        1. HERBICIDES AND PESTICIDES
          1. DISADVANTAGES:CAUSE POLLUTION SUCH AS AIR POLLUTION AND WATER POLLUTION
            1. ADVANTAGES:GIVE NUTRIENTS TO THE SOILS
              1. HERBICIDES KILLS WEEDS AND PESTICIDES KILL UNWANTED PESTS
            2. BIOLOGICAL CONTROL
              1. INTRUDUCE NATURAL ENEMIES
              2. SOIL
                1. REQUIRES FERTILISERS AND APPROPIATE PH
              3. SPACE LIMITATION
                1. INCREASE IN WORLD POPULATION

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