000			01984nab a22004577a 4500
001			G65486
003			MX-TxCIM
005			20211006080257.0
008			121211b |||p||p||||||| |z||| |
022	0		_a0002-9092
040			_aMX-TxCIM
082	0	4	_a97-000600
100	1		_aHuang, J. _9531
245	0	0	_aEnvironmental stress and grain yields in China
260			_c1995
340			_aPrinted
500			_areferences US (DNAL 280.8 J822)
520			_aAfter 1984 China's grain production began to stagnate, slowing during a time of continuing expansion of chemical inputs, irrigated area, and high-yielding rice, wheat, and maize varieties. In this paper we explore the hypothesis that the accumulation of environmental pressures, including erosion, salinization, soil exhaustion, and degradation of the local environment, may be partially responsible for the recent slowdown of grain yields. Using provincial production data from 1975 to 1990, the analysis shows that environmental factors, especially the breakdown of the environment, did contribute to the decline in the rate of increase of yields in China during the late 1980s. Erosion and salinization had a small, negative effect on yields
546			_aEnglish
595			_aAC
650	1	0	_aAsia
650	1	7	_aCereals _gAGROVOC _2 _91036
650	1	0	_aCrop husbandry _91058
650	1	0	_aEast asia
650	1	0	_aEconometrics
650	1	0	_aEconomic geography
650	1	7	_aEconomics _gAGROVOC _2 _91093
650	1	0	_aPlant products
650	1	0	_aProduction
650	1	0	_aProduction economics
650	1	0	_aProduction economics
650	1	0	_aSoil chemistry and physics
650	1	0	_aSoil deficiencies
650	1	0	_aTaxa
650	1	7	_aVarieties _gAGROVOC _2 _91303
650	1	0	_91952 _aSoil fertility _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
700	1		_aRozelle, S., _ecoaut. _9281
773	0		_tAmerican journal of agricultural economics (USA). (Nov 1995). v. 77(4) p. 853-864
942			_cJA
999			_c18932 _d18932