“See how involved it gets? Clover, bees, nitrogen, escape speed, power, plant-animal balance, gas laws, compound interest laws, meteorology—a mathematical ecologist has to think of everything and think of it ahead of time. Ecology is explosive; what seems like a minor and harmless invasion can change the whole balance.”

— Robert A. Heinlein , book Farmer in the Sky

Source: Farmer in the Sky (1950), Chapter 12, “Bees and Zeroes” (p. 125)

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Robert A. Heinlein 557

American science fiction author 1907–1988

Richard Menta American journalist

Source They Might Be Giants release First MP3 Only Album http://www.mp3newswire.net/stories/giants.html - 1999
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“Life on Earth is dependent on nature to survive.
Ecological balance comes naturally.
Planting trees and flowers can maintain a good environment.
Reproduction of saplings can benefit the earth.”

Deng Feng-Zhou (1949) Chinese poet, Local history writer, Taoist Neidan academics and Environmentalist.

(zh-TW) 萬物依存大自然，平衡動態順其緣。
栽花植樹維佳境，繁殖新生種福田。

"Reproduction" (繁殖新生)

Source: Deng Feng-Zhou, "Deng Feng-Zhou Classical Chinese Poetry Anthology". Volume 6, Tainan, 2018: 87.

“A trade deal will only happen if it is fair and balances the interests of both sides. Given the shape of the British economy, and our trade balance with the EU27, it is hard to see how any deal that did not include services could look like a fair and balanced settlement.”

Philip Hammond (1955) British Conservative politician

Brexit: Don't put bankers first in talks, says Labour https://www.bbc.co.uk/news/business-43334850 BBC News (8 March 2018)
2018

“It is the residue of animal and vegetable putrefaction, and is a black body; when dry it is pulverulent, and when wet has a soft, greasy feel… It is the produce of organic power—a compound of carbon, hydrogen, nitrogen, and oxygen, such as cannot be chemically composed.”

Albrecht Thaer (1752–1828) German agronomist and an avid supporter of the humus theory for plant nutrition

p. 336 http://books.google.com/books?id=zAhJAAAAMAAJ&pg=PA336; Cited in: Edmund Ruffin An Essay on Calcareous Manures, Volume 1. J.W. Randolph, 1852. p. 85.
Ruffin summarizes:
"Humus" is the term used by this author for the decomposed vegetable and other organic matter which is more or less mixed with all surface soil, and which gives to soil all its fertility, and furnishes all the food of plants.
The Principles of Agriculture, 1844, Section III: Agronomy