The double membrane around the nucleus is called the

the best conclusion based on the result of experiment is that the student who talked to one group of plants and hand watered them showed much more growth because they were hand watered not because student talked to them.the hand watered plants had a better growth because they had an adequate amount of water supply needed for their growth.the water reaches upto 6-10 inches.once the water is not soaked by soil the location of water can be shifted.but if you use sprinklers that is not manual then the adequate water supply cannot be fulfilled.there are many regions left where the water does not reach because of sprinklers and sometimes there is water logging that contributes to death of the plant.