Should I continue using this method to stop his barking?

I have a 1.5 year old large dog. I have had him since he was 2 months old. I have some problems with him. One of them is, he barks too much when he is alone in the garden.

To address this problem, in the past, I used to warn him by saying "shhh", sayingt one time was never enough, but repeating it somemes seemed working. If he starts barking too much, I would get him inside.

He have stayed at vet for about 4 months and about 15 days ago he returned back, to our new house.

Since he have come back, I stopped warning him by saying "shhh" or "no", instead, in the first days I just ignored him when barked at passer-bys. It didn't create a good effect, he was barking too much. Then I started using anothef method, when he starts barking at something, I use the command "come" and after he comes to me then I throw a little cheese into his crate and say "to crate". I read this method in a trainer's book, though it was a bit different, which she wrote. In her book she says, when the dog is in the garden and acts aggressively toward something outside, invite the dog to you then give him a food reward and lead him to inside home. But my dog is never free in the full garden, he is inside the fences in a seperate place in the garden, so I can not invite and lead him to inside home.

So when I apply the method in the way which I described, I have a strong doubt saying that I am actually reinforcing his barking or aggresiveness. When I first put him into his separate place in the garden(and I am always with him when he is in the garden) he mostly barks at passing motorcycles and cats and sometimes passing people.I use the method I described and after sometime, maybe cause he settled into the enronment or reinforced by my rewards, generally he starts barking at everything passes by, including cars and after a while he even goes worse, he starts barking continously.

Do you think by applying the method I described, I am actually reinforcing his barking?

So are you saying rewarding him with a food treat is making the barking worse? Maybe it is the timing that's off, for example if you are rewarding him while he is still barking. If he responds to the word "no", reward him as soon as he stops barking when you say the word.

Thanks for your answer.

I am not exactly saying that, I thought maybe.Though I should say that, I stopped giving rewards about 1 week ago, and it seems like he still does the same thing, generally for a while he is a bit quiet at first but after some time he starts to bark at everything...

I may try it.

If I give a treat everytime he starts barking aggressively in the garden, would I reinforce his aggressive barking behavior or reduce it?I mean, he may start barking/growling for treat, but it would not be real aggression anymore I think.

Only reward him if he's quiet. If he continues barking after you told him to stop, remove him from the situation that is causing the barking, when he stops that's when to give him the treat and praise

Thanks for your answer.

Can you explain this a bit more,how to remove him from the situation?Is it like the thing which I did, when he starts biting, inviting him to come to me by giving the command "come" and then when he comes saying "inside" and throw the food reward into his cage?Or for example, when he starts barking, putting a leash on his collar and going to a bit far part of his fenced area with him and then giving him the treat when he becomes quiet?

What I meant by removing him from the situation that's causing the barking, for example if he's sitting next to a window and barking at everyone that walks by, take him away from the window. You wrote earlier that he barks if left alone in the garden, so don't let him be in the garden alone if you can't get a handle on the barking because the longer he's allowed to go on barking the more difficult it will be to get it under control.

Thanks for your answer.

Sorry for my late reply.

He is barking at the fenced part,in the garden.To remove him from the situation, I think I should bring him indoors, if he continues barking,I think?If I do it, I fear that after some time he may get aggressive whenever I try to get himself indoors.