Media type: E-Article Title: How many soil samples are neccessary to obtain a reliable estimate of mean nitrate concentrations in an agricultural field? Contributor: Ilsemann, Jan; Goeb, Simone; Bachmann, Joerg imprint: Wiley, 2001 Published in: Journal of Plant Nutrition and Soil Science Language: Not determined DOI: 10.1002/1522-2624(200110)164:5<585::aid-jpln585>3.0.co;2-m ISSN: 1436-8730; 1522-2624 Keywords: Plant Science ; Soil Science Origination: Footnote: