I meant to say that a way to help people understand soil science, to understand about all the usefull things in good soil that get killed by chemical nitrogen and with pesticides and herbicides, would be with photos of soil microbes and things taken with a microscope. I missed out the "be" in, a usefull thing would be, and the sentence made no sense. I have never been able to write a sentence without a mistake in it.
Normal chemicals fertilisers only put in the nitrogen and phosforos and potasio and a few trace elements into soils and there are a lots of things scientist have found to be important in soils that chemical fertilisers don't put in and not only that, but chemical nutrients burn some of the usefull microbes and fungi in the soil they are too strong for them and they don't add humus and plants need humus and fungi if they're to grow really big. th eroots of fungi, micelium, hypha, behave like pipes of the water board, distributing water all over the field and lighten and aerate the soil and collect minerals and water for plants. They are better at picking up water and minerals than plant
roots are, plants give them elaborated foods like sugars.
Fungi and plants also produce enzmes and acids to digest the soil particles, they do exo-digestion. Fertilisers don't produce enzymes and acids that are useful in the soil unless you buy very fancy fertilisers.
The end product of the break down of organica matter is humus, of the scientists type humus, not the type you buy normally for your garden, that is half broken down organic matter. This sort of humus is a fine dust that can be very stable and last more than a thousand years though as its very light can easily get blown away,and as it has carbon in it, is a sink for carbon.
It helps minerals take forms that are more easily absorbable for plants. I am not a chemist but atoms combine with other atoms in different ways that change their natureand their usefullness. For instance, nitrogen can be paart of an amonia molecule, which is a molecule of one nitrogen atom and 4 hydrogen. I am not a chemist thats how i interpret the letters and numbers "NH4 +" which is amonia, which eaten by bacteria and such becomes "nitrites" NO2, nitrogen and 2 oxygens, that further eaten by bacteria and such becomes "nitrates" NO3, niutrogen and 3 oxygens, that plants can eat, absorbeand need to eat. Humus is good at helping with these chemical changes and so it is important in the soil and not present in traditional chemical fertilisers.
Humus as scientist understand the word also behaves like gelatines absorbing and retaining lots of water and the minerals dissolved in it. Important in dry places, were they need more humidity in the soil. Also it is slightly acid improving the PH of soils.
You can buy humic acids for plants but they're a pretty fancy type of fertiliser not your normal, traditional, brutal farming stuff, that became popular before they understood all the different positive aspects of soil instead of just one or two of them. You can look it up in the sight of the people that
sell fertilisers for
sustainable and biological agriculture. TNN industries, Acheiving Excellence in Sustainable and Biological Agriculture-tnn.com.au/_general0/0201nformation.asp they have pages on it. fisrt a mention on one page and then lots of metions a bit further on.
If you go to a shop for growing marihuana, legal here, though its not legal to deal in it, you can buy microbes to improve your soil. I did and really freaked myself out. At first i felt really cool and then i thought, "gosh i am going to give myself some terrible illness". I poured water full of microbes and fungi spores, though microbes can anhililate your fungi but i did not know it, on my garden, till i got too freaked out with doubts about unguarranted hippy products. Apparently many of these products come from Canada. They sell microrrhiziae fungi for the roots of plants and fertilisers with amino acids in them. I am not a saint but i have never grown marijauna but i have found out that stores for marihuana growers have really sophisticated fertilisers.
The man in the shop said there is a lot of money in it, thats why they have expensive and good fertilisers.
They had empty cans of humic acid by the banana plantations, the main crop of the Canary islands. So farmers can buy humic acids. They were growing bananas on practically new volcanic soil.
Masanubo Fukuokas rice was not just healthy and hippy, it was the rice that produced more than the rice of any other farmer, with bigger grains and more grains a head. He was a soil scientist and plant pathologist.
I bet the black dust of the dust bowl was humus, of the sort scientist refer to when they use the word, accumulated in the days before the plough touched american soils. That woud explain why the dust clouds were so dense and black and so fine that they got through all sorts of barriers. Putting a handkerchief in front of your mouth didnot stop the dust.
Put the words "dust bowl" in google. agri rose macaskie.