Table 2.

Mean and standard errors of mass (MMT), nitrogen (KT) and phosphorus (KT) content of exported rice, wheat, soy and maize between 2014 and 2018. Values exclude export within regions. Export values are compared with total nitrogen and phosphorus fertilizer use (both in MMT) for all of agriculture in each region during the period.

	rice		wheat		soy		maize		sum		fertilizer
export	mean	s.e.	mean	s.e.	mean	s.e.	mean	s.e.	mean	s.e.	mean	s.e.
mass (MMT)
Asia	14.74	0.50	0.72	0.06	0.33	0.02	0.10	0.01	15.88	0.50
Europe	0.36	0.01	67.48	2.79	2.17	0.28	16.05	0.53	86.06	3.26
Africa	0.11	0.05	0.02	0.01	0.12	0.04	0.79	0.30	1.03	0.28
S. America	1.36	0.11	4.07	1.21	72.72	5.42	42.68	2.68	120.83	8.38
C. America	0.05	0.02	0.96	0.18	0.00	0.00	1.05	0.26	2.06	0.30
N. America	2.40	0.12	42.53	1.01	55.07	2.23	53.31	4.26	153.31	4.45
Oceania	<0.01	<0.01	15.84	1.30	<0.01	<0.01	0.07	0.01	15.91	1.31
crop nitrogen (KT)											nitrogen (MMT)
Asia	221.14	7.43	14.90	1.31	19.12	1.43	1.51	0.20	256.67	7.81	63.99	0.25
Europe	5.41	0.22	1403.59	58.13	127.28	16.30	245.54	8.18	1781.82	75.09	14.74	0.11
Africa	1.63	0.79	0.36	0.13	7.17	2.23	12.03	4.63	21.19	5.34	3.88	0.18
S. America	20.44	1.58	84.56	25.13	4261.57	317.62	653.00	41.00	5019.56	363.06	7.29	0.41
C. America	0.76	0.31	20.00	3.65	0.13	0.07	16.04	4.00	36.93	5.07	1.73	0.13
N. America	36.02	1.73	884.71	21.08	3226.81	130.87	815.65	65.17	4963.19	141.56	14.34	0.06
Oceania	<0.01	<0.01	329.37	27.03	0.20	0.01	1.14	0.17	330.72	27.15	1.86	0.05
crop phosphorus (KT)											phosphorus (MMT)
Asia	42.75	1.44	2.86	0.25	2.58	0.19	0.31	0.04	48.50	1.49	24.56	1.03
Europe	1.05	0.04	269.92	11.18	17.16	2.20	49.75	1.66	337.88	13.68	3.73	0.06
Africa	0.32	0.15	0.07	0.03	0.97	0.30	2.44	0.94	3.79	0.98	1.47	0.05
S. America	3.95	0.30	16.26	4.83	574.51	42.82	132.31	8.31	727.03	52.08	6.37	0.20
C. America	0.15	0.06	3.85	0.70	0.02	0.01	3.25	0.81	7.26	1.01	0.73	0.08
N. America	6.96	0.33	170.14	4.05	435.01	17.64	165.26	13.20	777.38	20.99	5.06	0.06
Oceania	<0.01	<0.01	63.34	5.20	0.03	<0.01	0.23	0.04	63.60	5.22	1.24	0.02