My answers

Q: Why do some farms smell more than others?

A: This is a good question. It has a lot of variables, the type of farm to begin with. A grain, hay, or vegetable farm might look like any farm when flying by at 55 mph. 

However,

They might not have any animals on them, thus lacking the "farm" smell. 

The other reason depends a lot on the type, quality, and care of the animals. Having one cow and two pigs would probably not smell, much. having 200 cows and 300 pigs, that's a whole different story. 

How clean you keep your critters is important, but even if you are the cleanest farmer, 200 cows make a lot of poo. It has to go somewhere, for even if the cows are cleaned well, the smell of the manure pile will be wafted where it will by the wind. The type of food the cows are being fed makes a difference in the odor of the poo as well.

Q: Will chickens/birds lay eggs even without a rooster around?

A: Yes, the only difference is that the eggs will not be fertile. 

Don't women form an egg monthly even without a man around?

Q: Do farmers really have romantic trysts in the hayloft?

A: Well probably sometimes. Is it really romantic?

 Nope, it's dusty and hay is pokey, it doesn't feel good on the skin.

Q: Do farmers harm the soil?

A: Yes, and no. 

Good farmers that are concerned with soil conservation do everything they can to improve the soil, making it better every year. 

Some farmers are not concerned about this, so it depends on the farmer.

Q: Don't you feel sad when you butcher an animal you raised?

A: Of course! 

You are taking a life, that is always sobering, it should be done with great respect! That being said, we knew when the baby was born that this was going to be the end result so you prepare yourself for this fact. We spend much time and energy bringing up our meat animals to make sure they have happy lives. It is important that they have loving care and attention as long as they live with us. Humans have been eating animals since the beginning of time, it's just another part of the food chain.

Q: is it true all farmers are poisoning the ground with herbicides?

A: simply put, no!

 There are a lot of farmers that grow things organically, therefore using no chemicals whatsoever. 
There are also other ways to keep weeds down in the field. 
Such as cultivating which is a large version of rototilling. 

There are some farms that are so large that it is almost necessary to use herbicide to be able to produce any amount of product. 
Although I do not agree with using chemicals, I do understand their desperate need to keep the farm going and make a living.

I thank everyone for their questions and hope I have answered everything well enough.