The effects of crop husbandry and nitrogen fertilizer on nitrate leaching from a shallow limestone soil growing a five course combinable crop rotation - Johnson, P. A.; Shepherd, M. A.; Smith, P. N. (Blackwell Publishing Ltd, 1997)
http://dx.doi.org/10.1111/j.1475-2743.1997.tb00551.x
Keywords: TE-TZ; ZA-ZE