Contents
Part I Preserving the Quality of Groundwater
1 Evaluation and Modeling of the Impact of Environmentally
Friendly Fertilization Techniques
A. Shaviv ...................................................................... 3
I Introduction...... ... .... ...... .... ...... ..... ...... .... .... ... ..................... 3
2 Experiments with Environmentally Friendly Fertilization
Techniques....................................................................................... 4
2.1 Inhibition of Nitrification - Experimental Work...................... 4
2.2 Controlled-Release
Fertilizers.................................................................................. 5
3 Modeling Nitrogen
Dynamics.......................................................................................... 7
3. I Basic Data and Factors Used in the Simulations...................... 8
3.2 Effectiveness of EFFPs Under
Broadcasting...... ..... .... ...... ...... ...... ........ .... ......... ... ..... ...... ..... .... 9
3.3 Effect of Fertilizer Broadcasting and Banding on
N Leaching and N Uptake.... .... .... ... ..... ... ....... ............ .... .... ... .... 10
3.4 Interaction ofEFFPs with Banding ........................................... 11
4 Summary and Conclusions............................................................... 13
References ............................................................................................ 14
2 Identifying Soil and Transport Properties Using a Mode
of Infiltration-Redistribution Flow and Transport in the
Unsaturated Zone
S.C. Lessoff and P. Inde/man .................................................. 16
1 Introduction....... ....... ........ .................. .............................................. 16
2 Brief Description of the Field Experiment........................ .......... ..... 17
3 Flow and Transport
Model............................................................................................... 18
3.1 Solution for a Single Column.......... ........ ........ .............. ........... 19
3.2 Statistical Averaging ................................................................. 24
3.3 Identifying Parameters and Intervals of Confidence........ ......... 25
4 Results.... ................. .................. ...................................................... 28
5 Sumn1ary................... ............. ......................... ...... ........ ....... ............ 30
References......................... ................. ........... ...................... ................. 31