Nitrate movement through soil profile and groundwater pollution by nitrogen fertilizer in sand dune upland soil
1996
Nonaka, M. (Niigata Univ. (Japan). Faculty of Agriculture) | Abe, R. | Kamura, T.
The study on relationship between nitrogen fertilizer and accumulated water (precipitation and irrigation) and nitrate movement through soil profile on groundwater pollution was carried out on the experimental field in sandy soil for 1 year. The nitrogen fertilizers were applied to 268 N kg ha(-1) as chemical fertilizers in autumn radish cropping and 171 N kg ha(-1) as organic matters in summer tobacco cropping. The results were summarized as follows: (1) the chemical form of leached nitrogen was mostly as nitrate. The nitrate concentration in groundwater was increased by more than 100 mm accumulated water per month, but was decreased by below 100 mm accumulated water per month. (2) In the case of more than 100 mm accumulated water per month, the maximum peak of nitrate leaching appears at 3 weeks after basal application during autumn radish cropping. But, in the drought summer season of 1994, the nitrate leaching was depressed during summer tobacco in the drought summer season of 1994, the nitrate leaching was depressed during summer tobacco cropping
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by The Agriculture, Forestry and Fisheries Research Information Technology Center
