1703334014
1703334015
34.Charles Trevelyan, quated in Ranelagh, 1999, 117.
1703334016
1703334017
35.Trevelyan, quated in Handy, 2009, 332.
1703334018
1703334019
36.M. Davis, 2001.
1703334020
1703334021
37.Ibid., 302.
1703334022
1703334023
38.Ibid., 303.
1703334024
1703334025
39.Wolf, 1982, 258.
1703334026
1703334027
40.Lovell, 2012, 20.
1703334028
1703334029
41.Fortune, 1852, 357.
1703334030
1703334031
42.Brockway, 1979a, 26–29.
1703334032
1703334033
43.Brockway, 1979b.
1703334034
1703334035
44.A. Offer, 1991.
1703334036
1703334037
45.Erisman et al., 2008.
1703334038
1703334039
46.Galloway et al., 2004.
1703334040
1703334041
47.Manning, 2004.
1703334042
1703334043
48.Alcantara, 1973, 25.
1703334044
1703334045
49.农业活动咨询委员会，1951，4，在Brinkmann, 2009，5中引用。
1703334046
1703334047
50.Gaud, 1968.
1703334048
1703334049
51.Dubin and Brennan, 2009, 21.
1703334050
1703334051
52.统计总局，1955, 13–16.
1703334052
1703334053
53.Patel, 2013.
1703334054
1703334055
54.Ibid.
1703334056
1703334057
55.依据Cochrane, 1979, 128; EPI, 2012, 2013, 2014计算。
1703334058
1703334059
56.Moore, 2010c.
1703334060
1703334061
57.依据Fuglie and Wang, 2012, 2; Grantham, 2011计算。
1703334062
1703334063
58.参见：FAOSTAT database at www.fao.org/faostat/en/#home。
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