Table 3.

Compared with 1990, how four scenarios of 10 billion people fed better in 2070 affect N use, grain yields, and land taken for crops

	N Tg	Ratio, %	Yield, kg⋅ha−1	Crop N, kg⋅ha−1	Cropland, %
In 1990	79	150	1,900	38	11
Ten billion in 2070
Farming stagnated at 1990	284	150	1,900	38	38
Relying on deposition of N	0	0	344	7	210
Slower lifting of yields but	192	100	3,800	77	19
conserved N
Sustained lifting of yields and	192	100	7,600	155	10
conserved N