An investigation of soil compaction effects on nitrogen phosphorus and potassium movement in soil columns.
2008
Mohammadi, A., Putra Malaysia Univ. (UPM), 43400 UPM Serdang, Selangor (Malaysia). Faculty of Science. Dept. of Physics | Sadegh-Zadeh, F. | Jalili Seh-Bardan, B | Samsuri, A., Putra Malaysia Univ. (UPM), 43400 UPM Serdang, Selangor (Malaysia). Faculty of Agriculture. Dept. of Land Management | W.Chorom, M. | Yazdani, G.A..(eds.)., Shahid Chamran Univ., Ahvaz, Iran. (Iran). College of Agriculture. Dept. of Soil Science.
Soil compaction influences soil hydraulic properties, water flow, and solute movement. The objective of this study was to investigate the movement of the added fertilizers to soil as affected by soil compaction. In the experimented soil, four compaction levels were used. Each column of soil was divided in to six equal parts where the elements in the columns were measured. The data were then analyzed using the statistical software (SAS). Results showed that as the compaction is increased, the downward movement of nitrogen (N) and potassium (K) downward were reduced, but increased for phosphorus (P). The reason for this was bacause the movement of N in low compaction was due to the existence of macropores for preferential flow and suitable conditions for nitrification. The movement of K in low compaction is due to movement through macropores and preferential flow. The increase in P movement in high compaction was caused by high moisture and diffu sion.
显示更多 [+] 显示较少 [-]