How to handle greenhouses? (Farming Simulator 2013)

x3m2 I
flooded water, threw manure and there is nothing else to do there! Money - $ 10-15 per day will drip into the account on its own, the crop from the greenhouses is not for sale.

And how to pour water and throw manure?

Dima Bondar1
You need to buy two barrels, one for water that you collect from the river, and the second for liquid manure that you collect in the barn.

tell me how to throw manure into the greenhouse bought a tank and filled it with manure but I can't throw it ??????????????

but how to sell it if you put it by accident?