Name the Artist: Yeah, Yeah, Yeah?

Questions

The average human body contains enough phosphorous to make how many match heads?

The average human uses which muscles most?

The base of the great pyramid of Egypt is large enough to cover how many football fields?

The basic ingredients of a ploughmans lunch is bread & what?

The basis of all scientific agriculture, which involves six essential practicesproper tillage; maintenance of a proper supply of organic matter in the soil; maintenance of a proper nutrient supply; control of soil pollution; maintenance of the correct soil acidity; & control of erosion?