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==== Pengolahan tanah dan Nitro Oksida ====
[[Biogeokimia|Proses biogeokimia]] yang terjadi pada tanah dapat menghasilkan berbagai [[emisi gas rumah kaca]], termasuk [[Nitro oksida|Nitro Oksida]].<ref>{{Cite journal|last=Freney|first=J.R.|date=1997-07-01|title=Emission of nitrous oxide from soils used for agriculture|url=https://doi.org/10.1023/A:1009702832489|journal=Nutrient Cycling in Agroecosystems|language=en|volume=49|issue=1|pages=1–6|doi=10.1023/A:1009702832489|issn=1573-0867}}</ref> Terlebih lagi, praktik dalam manajemen pertanian juga dapat mempengaruhi tingkat [[emisi]]. Sebagai contoh, tingkat persiapan lahan juga telah terbukti dapat mempengaruhi emisi Nitro Oksida<ref>{{Cite journal|last=MacKenzie|first=A. F.|last2=Fan|first2=M. X.|last3=Cadrin|first3=F.|date=1998|title=Nitrous Oxide Emission in Three Years as Affected by Tillage, Corn-Soybean-Alfalfa Rotations, and Nitrogen Fertilization|url=https://acsess.onlinelibrary.wiley.com/doi/abs/10.2134/jeq1998.00472425002700030029x|journal=Journal of Environmental Quality|language=en|volume=27|issue=3|pages=698–703|doi=10.2134/jeq1998.00472425002700030029x|issn=1537-2537|access-date=2020-08-01|archive-date=2021-05-25|archive-url=https://web.archive.org/web/20210525181630/https://acsess.onlinelibrary.wiley.com/doi/abs/10.2134/jeq1998.00472425002700030029x|dead-url=yes}}</ref>.<ref>{{Cite web|url=http://www.fao.org/3/a-i7754e.pdf|title=Water pollution from agriculture:a global review|last=|first=|date=|website=www.fao.org|access-date=02-08-2020}}</ref><ref>{{Cite journal|last=Khatri|first=Nitasha|last2=Tyagi|first2=Sanjiv|date=2015-01-02|title=Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas|url=https://doi.org/10.1080/21553769.2014.933716|journal=Frontiers in Life Science|volume=8|issue=1|pages=23–39|doi=10.1080/21553769.2014.933716|issn=2155-3769}}</ref>
== Sumber biotik ==
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