An ecological agriculture pattern:forests(at hilltop) tea and fruit gardens(at hillside) cropping(in valley) fishery(in pond)is suggested to be popularized on the hilly red soil regions,This pattern should be adjusted according to the difference of physical and chemical characters of the red soils at different slope positions.Pig farm is built by ponds and a food chain,which consists of grass(forage) hog(dung) marsh gas,mushroom fruit,(crops) fish(pearl),is formed.On this basic,food is compounded,dun...