Ecoefficiency of Intensive Agricultural Production and Its Influencing Factors in China: An Application of DEA-Tobit Analysis

Table 2

Input-output variables of intensive agricultural production.

Category	Variable	Unit	Formula	Formula explanation
Input	Labor intensity	Person/hm^2		is labor intensity.
	Agricultural machinery use intensity	w/hm^2		is agricultural machinery use intensity.
	Pesticide use intensity	kg/hm^2		is pesticide use intensity.
	Chemical fertilizer use intensity	kg/hm^2		is chemical fertilizer use intensity.
	Diesel oil use intensity	kg/hm^2		is diesel oil use intensity.
Output	Ammonia nitrogen emission benefit	10^8 yuan/t		is ammonia nitrogen emission benefit.
	Total nitrogen emission benefit	10^8 yuan/t		is total nitrogen emission benefit.
	Total phosphorus emission benefit	10^8  yuan/t		is total phosphorus emission benefit.

Agricultural land area = cultivated land area + garden land area.