Editing Sunflower seed (section)

==Hulls==
The hulls, or shells, mostly composed of [[cellulose]], decompose slowly and may be burned as [[biomass]] fuel.<ref name=seed-biomass>{{cite journal | vauthors = Zabaniotou AA, Kantarelis EK, Theodoropoulos DC | title = Sunflower shells utilization for energetic purposes in an integrated approach of energy crops: laboratory study pyrolysis and kinetics | journal = Bioresource Technology | volume = 99 | issue = 8 | pages = 3174–81 | date = May 2008 | pmid = 17651967 | doi = 10.1016/j.biortech.2007.05.060 | bibcode = 2008BiTec..99.3174Z | url = http://www.technologia.gda.pl/dydaktyka/index/s/easm_tos/pdf/Seminarium_4A.pdf | access-date = 13 March 2019 | archive-date = 7 August 2020 | archive-url = https://web.archive.org/web/20200807145402/http://www.technologia.gda.pl/dydaktyka/index/s/easm_tos/pdf/Seminarium_4A.pdf | url-status = dead }}</ref> Sunflower hulls of the cultivated sunflower (''[[Helianthus annuus]]'') contain [[allelopathic]] compounds which are toxic to grasses and the vast majority of cultivated garden plants.<ref name="auto">{{cite journal | doi = 10.1007/BF02381723 | title = Weed control using allelopathic sunflowers and herbicide | journal = Plant and Soil | volume = 98 | pages = 17–23 | year = 1987 | vauthors = Leather GR | issue = 1 | bibcode = 1987PlSoi..98...17L | s2cid = 991370 | url = https://zenodo.org/record/1232536 }}</ref><ref name="auto1">{{cite journal | journal = Allelopathy Journal | volume =23 |issue=1 |date=2009 | url=http://web.a.ebscohost.com/abstract?direct=true&profile=ehost&scope=site&authtype=crawler&jrnl=09714693&AN=41527054&h=zxcFsPZ3%2ffS2EMvdiSznqVnhoskpXagzYSjWUsfnsi8R3z6J2ksP%2baT27FdhdCjiG9AE38ivDgdrl0yL3E3HrA%3d%3d&crl=c&resultNs=AdminWebAuth&resultLocal=ErrCrlNotAuth&crlhashurl=login.aspx%3fdirect%3dtrue%26profile%3dehost%26scope%3dsite%26authtype%3dcrawler%26jrnl%3d09714693%26AN%3d41527054 | title = Allelopathic potential of sunflower. I. Effects of genotypes, organs and biomass partitioning | vauthors = Ciarka D, Gawronska H, Szawlowska U, Gawronski SW | pages = 95–109}}</ref> Only a small number of garden plants, such as [[Daylily|day lilies]], are unaffected by the allelopathic compounds found in sunflower hulls.<ref name="auto"/><ref name="auto1"/>