Fertilizer natural

Albrecht, W.A. (1953) Organic matter balances soil fertility. Natural Food and Farming, February 1953. 

Tiessen, H., Cuevas, E., and Chacon, P. (1994). The role of soil organic matter in sustaining soil fertility. Nature. 371,783-785. 

Mack, M. C., Schuur, E. A. G., Bret-Harte, M. S., Shaver, G. R., and Chapin, F. S. (2004). Ecosystem carbon storage in arctic tundra reduced by long-term nutrient fertilization. Nature 431(7007), 440-443. 

Waite A., and Zeldis J. (2000) A mesoscale phytoplankton bloom in the Polar Southern Ocean stimulated by iron fertilization. Nature 407, 695—702. 

Davison W., George D. G., and Edwards N. J. A. (1995) Controlled reversal of lake acidification by treatment with phosphate fertilizer. Nature 377, 504-507. 

A man whose life was rather dull and unhealthy began to become aware of his condition and decided that he wanted to grow beautiful flowers and nutritious vegetables in his yard. He wasn t sure how to go about it, so he went to a local store and looked around. There were packs of seed with marvelous illustrations of beautiful flowers and nutritious vegetables on them, and boxes and jars of fertilizers. Naturally these seemed just what he wanted. 

Austin, C.R. (1948). Number of sperms required for fertilization. Nature 762 534-537. 

Fertilizers natural (organic), except compost Nitric acid... 

Cooper DJ, Watson AJ, and Nightingale PD (1996) Large decrease in ocean-surface CO2 fugacity in response to in-situ iron fertilization. Nature 383 511-513. 

Another timely example is tracing the origin of nitrate in ground and surface waters. At high concentration this substance is toxic, and can only be dealt with if its source can be identified. Different sources (animal waste, fertilizers, natural rocks) have different ratios however, the differences are so small that precise ratios... 

Ammonia (NH3) comes from several sources, including waste and fertilizers, natural decay processes, combustion, sewage treatment plants. 

Uranium The basic raw material of nuclear energy, uranium is a radioactive element with the atomic number 92 and, as found in natural ores, an average atomic weight of approximately 238. The two principal natural isotopes are uranium 235 (0.7% of natural uranium) which is fissionable and uranium 238 (99.3% of natural uranium) which is fertile. Natural uranium also includes a minute amount of uranium 234. 

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