I have several issues with the block of text you just posted. Off the bat, none of your claims are sourced or substantiated in any way. I don't generally expect sourcing from claims in forums but when you make quite large claims which actually do require some scientific basis it pays to provide sources to increase credibility and separate it from a rant (albeit an eloquent one).
In the first paragraph you state the aims of organic agriculture and that's fine but you then say "Organic agriculture takes a proactive approach as opposed to treating problems after they emerge.", isn't the whole point of many of the pesticides and chemicals that organic agriculture is against to stop observed problems (insect infestation, lack of soil nutrients) from happening in the first place? That sounds proactive to me.
In the second paragraph you begin by mentioning many common farming practices that can be applied to organic and non-organic farms and although I agree with what you say about these effective farming methods it doesn't prove much beyond that these methods are useful. What gets me is where you say "In turn, nutrient and energy cycling is increased and the retentive abilities of the soil for nutrients and water are enhanced, compensating for the non-use of mineral fertilizers.", although all of these methods may add to nutrients in ground and may even altogether add an equal number of nutrients into the ground as non-organic fertilizers; the question looms: Why not use mineral fertilizers on top of that? The second half of this paragraph raises even more questions. You claim that "The length of time that the soil is exposed to erosive forces is decreased, soil biodiversity is increased, and nutrient losses are reduced, helping to maintain and enhance soil productivity.", how? What evidence do you have to prove that using basic farming methods like "crop rotations, inter-cropping, symbiotic associations, cover crops, organic fertilizers and minimum tillage" coupled with non-organic soil treatment and fertilizer effects erosion at all? After this you contradict the whole point of the paragraph above by stating that "it is sometimes necessary to supplement organic soils with potassium, phosphate, calcium, magnesium and trace elements from external sources.", there is no difference between this and using mineral fertilizer.
I almost completely agree with the second paragraph except that farming is inherently invasive to the surrounding area and this paragraph implies that organic farming will somehow not be; which is wrong. Also there are a huge variety of unfounded claims. How does "enhancing soil structure and water infiltration. Well managed organic systems with better nutrient retentive abilities, greatly reduce the risk of groundwater pollution"? And what evidence do you have to prove it?
You claim that "Organic agriculture reduces non-renewable energy use by decreasing agrochemical needs (these require high quantities of fossil fuel to be produced)" yet you ignore the fact that the prime producers of organic manure (livestock) are some of the largest greenhouse producers on the planet(
http://www.fao.org/newsroom/en/news/200 ... index.html). Naturally if non organic fertilizers will be reduces than organic forms like cattle and other livestock must be increased to meet the demand thus negating the previous point to a degree. As for the rest of the paragraph the only problem I have is, once again, some unfounded claims like "Many management practices used by organic agriculture (e.g. minimum tillage, returning crop residues to the soil, the use of cover crops and rotations, and the greater integration of nitrogen-fixing legumes), increase the return of carbon to the soil, raising productivity and favouring carbon storage." although this does sound quite credible in itself.
Right from the get go this paragraph makes a huge un-sourced generalization. You claim that "At the gene level, traditional and adapted seeds and breeds are preferred for their greater resistance to diseases and their resilience to climatic stress." however the entire point of gene modification is to make the product more resistant to exactly what you said (as well as increasing yield) so unless you can find some evidence to support your claim logic dictates that it is unlikely for a gene that has not been modified to survive in an environment will survive in an environment better than one that has been modified. You say that "At the species level, diverse combinations of plants and animals optimize nutrient and energy cycling for agricultural production.", claims like this need to be substantiated, where is your evidence to prove that this happens and what are its practical application to agriculture? I find it amusing that in the following quote "The provision of structures providing food and shelter, and the lack of pesticide use, attract new or re-colonizing species to the organic area (both permanent and migratory), including wild flora and fauna (e.g. birds) and organisms beneficial to the organic system such as pollinators and pest predators." you fail to mention that the "provision of structures providing food and shelter, and the lack of pesticide use" will by its very nature attract pests as well, potentially crippling farms until the rest of the ecosystem moves in to prey on said pests.
I agree with most of this paragraph except that you say "he potential impact of GMOs to both the environment and health is not entirely understood", does this mean that when a particular GMO is understood it will be considered 'organic'? Also, grouping all GMOs as "not entirely understood" is a generalization which should be avoided, to be practical GMOs should betaken on a case by case basis.
In what seems to be your summary paragraph you seem to only attempt to reinforce the points you made earlier so I'll just allow you to refer to my problems with those.
In summary, much of what you said is either logically wrong or such a broad generalization that you need to provide evidence to back the claim. Seeing as you have not provided evidence for your claims they are unsubstantiated, and thus can be dismissed insubstantially