caa a22 4500 477109977 CHVBK 20180405111606.0 cr unu---uuuuu 170330e19960401xx s 000 0 eng 10.1007/BF00011284 doi (NATIONALLICENCE)springer-10.1007/BF00011284 Addiscott T. IACR-Rothamsted, Harpenden, AL5 2JQ, Herts, UK aut Measuring and modelling nitrogen leaching: parallel problems [Elektronische Daten] [T. Addiscott] In studies of nitrate leaching both experimenters and modellers experience problems arising from soil variability. Because of the small-scale heterogeneity that gives rise to mobile and immobile categories of water, both measurements and modelling are easiest in homogeneous sandy soils and most difficult in strongly structured clay soils. There are also parallels at plot and field scale in the problems caused to experimenters by log-normal distributions of nitrate concentrations and those caused to modellers by non-linearity in models. All researchers need to be aware that a reliable estimate of the mean from a set of measurements or a model may necessitate considerations of variances as well as means. Kluwer Academic Publishers, 1996 leaching nationallicence nitrate nationallicence nitrogen nationallicence Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 181/1(1996-04-01), 1-6 0032-079X 181:1<1 1996 181 11104 https://doi.org/10.1007/BF00011284 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011284 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Addiscott T. IACR-Rothamsted, Harpenden, AL5 2JQ, Herts, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 181/1(1996-04-01), 1-6 0032-079X 181:1<1 1996 181 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer