Question

Explain how abiotic factors spoil foodgrains?​

Answer 1

Explanation:

Biotic factors are living organisms that reduce cropproductivity due to eitlier directly feeding on them (e.g.,insects, rodents) or causing diseases (e.g., nematodes, my coplasmas, bacteria, viruses, fungi). Abiotic factors are non-living components of environment that affect growth of crop plants like excess of water (water-logging), scarcity of water (drought), salinity, heat, cold or frost. Water logging reduces aeration of soil whichis harmful to growth and functioning of roots. In drought, water is not available to meet the requirement ofthe plants for transpiration, growth and photosynthesis. Frost, cold and heat reduce or inhibit metabolic activities and are, therefore, harmful.

Answer 2

Answer:

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Various abiotic factors associated with damage to food grains are:  

1. Temperature: If food is stored at lower temperature, then enzymes, insects and the other micro-organisms, which spoil the food, become less active. The damage to the stored food is decreased.

2. Moisture: For safe storage of food grains, it is essential that the moisture in the food grains should not be more than 14% by weight.

3. Humidity: Growth of moulds and fungi in food grains takes place due to humidity of air.

4. Material of the container: Food grains should not be stored in lead container, because lead is a toxic metal.