Create an Animation

I want a short, 1 to 2 minute 2D animation which shows the benefits of broadcast helicopter aerial fertilizing on Oil Palm plantations over traditional hand sowing. The aerial application (helicopter) should show the fertilizer granules moving down through the soil and being taken up by the root ball and the trees becoming greener and healthier as a result. With the hand sowing, because the fertilizer is distributed less uniformly, some of the granules will make it past the root ball and be leached down into the sub surface aquifer. Only parts of the tree become greener because not all of the root ball has access to fertilizer.