14. What would change if the gravitational force acting on us changed - mass or weight?
15. What is the difference between green manure and biofertiliser?
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Explanation:
*when gravitational force change weight will change there will be no effect on mass.
W= mg
*green manure --- these are made up of dead plant parts that either off in soil and make humus
biofertilisers --- substance that contains microorganisms (like rizobes ) which when apply on soil it make it more fertile by making pore and fixing more N2 in soil
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