Hey buddy...you are right....
but you know i have to deal with 6 to 7 moisture sensor...and my other pins of controller is also busy at that time when i am taking input form sensor...
so, you can understand that if i use sensor suggested by you it will not compatible with my system.
so, i am planing to make separate sensor array of 6 to 7 sensor....and want 6 terminal only from sensor..
and this value i can give to ADC...so that i can do my operation..
thank you