EurekaMag.com logo
+ Translate

An empirical model for estimating nitrate leaching as affected by crop type and the long-term N fertilizer rate


, : An empirical model for estimating nitrate leaching as affected by crop type and the long-term N fertilizer rate. Soil Use & Management 14(1): 37-43, March

An empirical model was developed for prediction of annual average nitrate leaching as affected by the long-term rate of N fertilization and crop type. The effect of N fertilization was estimated from annual values of nitrate leaching obtained from two Danish investigations of drainage from pipe drains with four rates of N fertilization on a loamy sand and a sandy clay loam from 1973-89. The effect of crop at normal N fertilization was estimated from 147 observations of annual nitrate leaching obtained from field measurements. The nitrate leaching model consists of a relative N fertilization submodel and an absolute submodel for specific combinations of crop, soil and drainage at the normal rate of N fertilization. The relative submodel is Y/YIN = exp(0.71(N/N1 - 1)), where Y is the nitrate leaching (kg N/ha per year) at fertilization rate N, and YIN and N1 are the corresponding values at the normal rate of N fertilization. The relative submodel is valid for cereals, root crops and grass leys fertilized with mineral fertilizer at N/N1 < 1.5, and on the prerequisite that the fertilization rate N has been constant for some years. To illustrate the use of the relative leaching submodel, estimated values of YIN corrected to mean annual drainage for 1970 to 1990 in Denmark for spring cereals and grass on sandy and loamy soils are given as input to the relative leaching submodel. The model can be used for sandy to loamy soils to estimate the mean nitrate leaching over a number of years.

Accession: 003037946

DOI: 10.1111/j.1475-2743.1998.tb00608.x

Download PDF Full Text: An empirical model for estimating nitrate leaching as affected by crop type and the long-term N fertilizer rate


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Nielsen N.E.; Jensen H.E., 1990: Nitrate leaching from loamy soils as affected by crop rotation and nitrogen fertilizer application. Nitrate leaching as affected by cropping system/crop rotation, history of farmyard manure application of fertilizer nitrogen application (0 N, 0.5 N and 1 N) was studied at nine sites on loamy soils during 1986/87, 1987/88 and 1988/89. Soil soluti...

Fox, R.H.; Zhu, Y.; Toth, J.D.; Jemison, J.M.; Jabro, J.D., 2003: Nitrogen fertilizer rate and crop management effects on nitrate leaching from an agricultural field in central Pennsylvania. Eighteen pan lysimeters were installed at a depth of 1.2 m in a Hagerstown silt loam soil in a corn field in central Pennsylvania in 1988. In 1995, wick lysimeters were also installed at 1.2 m depth in the same access pits. Treatments have include...

Fox, R.H.; Zhu, Y.; Toth, J.D.; Jemison, J.M.J.; Jabro, J.D., 2001: Nitrogen fertilizer rate and crop management effects on nitrate leaching from an agricultural field in Central Pennsylvania. Eighteen pan lysimeters were installed at a depth of 1.2 m in a Hagerstown silt loam soil in a maize field in central Pennsylvania, USA, in 1988. In 1995, wick lysimeters were also installed at 1.2 m depth in the same access pits. Treatments have...

Johnson, P.A.; Shepherd, M.A.; Hatley, D.J.; Smith, P.N., 2002: Nitrate leaching from a shallow limestone soil growing a five course combinable crop rotation: the effects of crop husbandry and nitrogen fertilizer rate on losses from the second complete rotation. The field experiment tested the effects of three management systems on nitrate leaching losses from a five crop rotation on the Lincolnshire Limestone in Eastern England. The Standard system was similar to farming practice in the area. The Protect...

Eriksen, J.; Askegaard, M.; Kristensen, K., 1999: Nitrate leaching in an organic dairy/crop rotation as affected by organic manure type, livestock density and crop. The effect of four organic farming systems with different livestock densities and different types of organic manure on crop yields, nitrate leaching and N balance in an organic dairy/crop rotation (barley-grass-clover-grass-clover-barley/pea-winte...

Vinten, A.; Ball, B.; O'-Sullivan, M.; Henshall, J.; Howard, R.W.ight, F.R.tchie, R., 2002: The effects of cultivation method and timing, previous sward and fertilizer level on subsequent crop yields and nitrate leaching following cultivation of long-term grazed grass and grass-clover swards. A 3-year field experiment was conducted in 1996-98 near Penicuik, Scotland, to investigate the fate of N released after cultivation of previously long-term grass and grass-clover swards. The effects of timing of cultivations (autumn and spring), t...

Campbell, C.A.; Selles, F.; Zentner, R.P.; De-Jong, R.; Lemke, R.; Hamel, C., 2006: Nitrate leaching in the semiarid prairie: Effect of cropping frequency, crop type, and fertilizer after 37 years. A high NO 3 concentration in drinking water can be a health hazard. Further, leached N represents an economic loss to the producer. Although NO3 leaching to ground water would be minimal on the semiarid prairies, leaching can occur especially whe...

Hansen, E.M.; Djurhuus, J., 1996: Nitrate leaching as affected by long-term N fertilization on a coarse sand. A field experiment on a coarse sand (1987-92) was conducted with spring barley (Hordeum vulgare L), in order to evaluate the effects of increasing N fertilization on nitrate leaching under temperate coastal climate conditions. The N fertilizer lev...

Otoma, S.K.boi, T., 1985: Model simulating of solute leaching and its application for estimating the net rate of nitrate formation under field conditions. Journal of hydrology, 82(3-4): 193-209

Otoma S.; Kuboi T., 1985: Model simulation of solute leaching and its application for estimating the net rate of nitrate formation under field conditions. A model of the discrete types was built to describe unsteady infiltrations and redistributions of water and solutes in soil. The model was evaluated by comparing the measurements of the changes in chloride concentration in the field soil amended w...