A powerful first half performance was just enough to send Ag College to the outright lead on the Southern Inland ladder.
Wagga City came into the clash at Beres Ellwood Oval level on points, but failed to fire in the first half.
Instead it was last year's grand finalists who ran in five tries to two to take a 35-14 lead at the break.
However Wagga City proved they are a serious contender, getting to within five points before their second half comeback ran out of time.
Ag College coach Will Mitchell was left to lament a tryless second half despite running out 41-36 winners.
"We spoke at half-time about really putting the foot on the throat and not letting them back into it as I know what City are like when they get a sniff," Mitchell said.
"They score tries really quickly so I'm a bit disappointed we let them back into the game.
"But we finished it off when it end so we'll move on."
Mitchell believes the side didn't adapt to what City threw at them in the second half, especially through their back line, but in the end Hamish Pennington's goalkicking proved to be the difference.
He converted all five of their tries, plus kicked two crucial penalty goals in the second half, while Wagga City scored one more try by James Curgenven only slotted three conversion attempts.
The Wagga City coach was disappointed that his continues it's patchy display.
"In the second part of the first half we switched off, they got a big lead up and you are not going to run down a side like that," Curgenven said.
"We came back and in the second half we were 10 times better, everyone was focused but we still have the same problem week-in and week-out. We have 20 minute spells where we just switch off."
Curgenven also thought the team struggled to deal with Hamish Wrafter being yellow carded after Rory Sheard opened the scoring for them.
He said it gave Aggies plenty of momentum.
However after upsetting Waratahs to start the season, the result shows they will be contenders again this season coming off a winless year.
Gabe Brown was strong up front for Ag College, crossing for an early double, while and Matt Harris also impressed.
Will Boneham crossed for a hat-trick in the losing effort.
Ag College are now preparing for a test against a Griffith outfit who almost got the better of Waratahs while City take on Albury coming off a big win over CSU.