With the theory of not developing the positive feedback loop directly but to do amay with the limiting factor source in the negative feedback loop to eliminate the growth upper limit

the authors do research on five growth upper limit feedback loops

short for the "a body of five parts"（well

v

entilation、reducing

h

eat

anti-mosquito、 anti

e

pidemic disease and antipollution） of the successful mode of the appropriate scale of peasant household

r

aising.Managed to study the successful experiences on the appropriate scale of raising with the system scientific methods

and provide the applying

t

heories study to increase the farmer’s income in "SangLong".well

v

entilation;reducing

h

eat;anti

m

osquito;anti

e

pidemic disease;anti

p

ollution;the analysis of systemic Archetypes