This law states thatIn case of TP:"If more and more units of a variable factor are employed with fixed factors, total product (TP) increases at diminishing rate and finally starts falling."In case of MP:"If quantities of a certain variable factor are increased while quantities of other factors are fixed, MP first increases, then may become constant and finally declines."Tabular and Diagrammatic presentation:


Land (Acre)
No. of labourers
TP (Quintal)
AP (Quintal)
MP  (Quintal)
 


1
0
0
0
-
 


1
1
2
2
2
Ist Phase


1
2
6
3
4


1
3
12
4
6


1
4
16