https://www.soils.org/publications/jeq/articles/36/6/1821 If N fertilization can have a negative effect on soil C sequestration, the same trend observed for the Morrow Plots should be readily evident from data collected in field studies elsewhere. Such evidence is common in the scientific literature but has seldom been acknowledged, perhaps because N fertilizer practices have been predicated largely on short-term economic gain rather than long-term sustainability. Within the USA Corn Belt, fertilizer N has often been found to increase biomass production while being of little benefit to soil C sequestration, according to studies conducted with various tillage systems in Indiana (Barber, 1979), Iowa (Russell et al., 2005), Kansas (Dodge and Jones, 1948), Kentucky (Blevins et al., 1983), Michigan (Vitosh et al., 1997), Minnesota (Reicosky et al., 2002), Missouri (Smith, 1942), Nebraska (Lesoing and Doran, 1997), North Dakota (Black and Tanaka, 1997), South Dakota (Pikul et al., 2001), and Wisconsin (Motavalli et al., 1992). The same trend has been documented more widely not only for corn (Gusser, 1970; Bloom et al., 1982; Huggins and Fuchs, 1997; Peters et al., 1997; Vanotti et al., 1997; Liang et al., 1998; Clapp et al., 2000; Brye et al., 2002; Wilts et al., 2004) but also for wheat (Triticum aestivum L.) (Dyer, 1902; White, 1927; Rasmussen et al., 1980; Campbell et al., 1991; Jenkinson, 1991; Campbell and Zentner, 1993, 1997; Rasmussen and Parton, 1994; Dalal et al., 1995; Nyborg et al., 1995; Rasmussen and Smiley, 1997; Potter et al., 1998; Izaurralde et al., 2001; Halvorson et al., 2002; Follett et al., 2005; Machado et al., 2006), barley (Hordeum vulgare L.) (Jenkinson and Johnston, 1977; Johnston, 1997; Machado et al., 2006), rice (Oryza sativa L.) (Lal, 1986), cotton (Gossypium hirsutum L.) (Cope et al., 1958; Sainju et al., 2005), various mixed cropping systems (Draycott et al., 1978; Christensen and Johnston, 1997; Potter et al., 1998; Sainju et al., 2002, 2006), and pine plantations (Harding and Jokela, 1994; Leggett and Kelting, 2006). No way to reasonably extrapolate Quack?