Journal or Book Title
Transactions of the ASAE
Research Focus Area(s)
Land and Water Resources Engineering
An experiment was performed to determine the movement of NOa-N through no-till and moldboard-plowed field plots. On the plowed plots, NOa-N (about 150 kg/ha) was surface broadcasted either before or after tillage; on the no-till plots, only surface application of NO3-N without tillage was used. Two rains of 12.7 and 6.35 cm (2.3 cm/h) were applied about one day apart with a rainfall simulator to the 5x5 m plots. Soil sampling down to 150 cm was performed before and after rainfall for soil water content and N03-N analyses. Results showed that plots under no-till maintained significantly higher N03-N amounts in the 0- to 30-cm layer, with 40% of the N03-N initially present still there after 12.7 cm of rain and 33% remaining after the additional 6.35 cm of rain. The corresponding numbers for the moldboard-plow plots were 19 and 9%. The amount of N03-N leached from the 150-cm profile with 12.7 cm of rain was also less (29 kg/ha) for the no-till compared with moldboard-plowed plots (122 kg/ha).
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Kanwar, Rameshwar S.; Baker, James L.; and Laflen, John M., "Nitrate Movement Through the Soil Profile in Relation to Tillage System and Fertilizer Application Method" (1985). Agricultural and Biosystems Engineering Publications. 688.