PT - JOURNAL ARTICLE AU - B.A. Stewart AU - Rattan Lal TI - The nitrogen dilemma: Food or the environment AID - 10.2489/jswc.72.6.124A DP - 2017 Nov 01 TA - Journal of Soil and Water Conservation PG - 124A--128A VI - 72 IP - 6 4099 - http://www.jswconline.org/content/72/6/124A.short 4100 - http://www.jswconline.org/content/72/6/124A.full