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Originally Posted by nutronjon
I believe I killed many seeds, by trying to rush sprouting. I soaked them in water and then let them dry out, because I decided the seeds where too small to sprout that way. Now they are planted in soil and won't sprout. Conclusion I killed them, and this must have something to do hydrogen. Right?
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Why do you suspect Hydrogen?
I would guess that they died when you dried them out. What kind of seeds are you trying to sprout?
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Some of my soil is very woody, and this depletes nitrogen, which is need for growing plants. Right? What is happening here? Why would wood deplete nitrogen and why must plants have it?
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Live plants deplete soil nitrogen (except for nitrogen-fixing plants such as legumes, vetch, etc.). Wood chunks in the soil actually add nitrogen to the soil as they are processed by fungus and bacteria.
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Next question, why is it so easy to kill the plants we want, and so hard to get rid of the plants we don't want?  Seriously- may be understanding this, will improve my ability to get desired results.
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It depends.
Define what you mean by "plants we want". If you mean food crops, then it's difficult to keep them healthy because other critters want them as well. In other words, if it is a plant we want, there's a good chance something else wants it as well. What are you having difficulty growing?
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I am restricting this to plant life, to keep it comprehensive. After I get a grasp on what is happening with plant life, then I want to tackle animal life. You all have taught me a lot and really appreciate you.
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As a primer to plant chemistry, I would recommend reading about
Photosynthesis.
