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Simulation of Nitrate Leaching under Different Irrigation Deficit and Nitrogen Levels in Tomato Crop using HYDRUS 1-D

Simulation of Nitrate Leaching under Different Irrigation Deficit and Nitrogen Levels in Tomato Crop using HYDRUS 1-D

Masaud Khan1*, Muhammad Jamal Khan1, Tahir Sarwar1 and Muhammad Jamal Khan2 

1Department of Water Management, The University of Agriculture, Peshawar, Khyber Pakhtunkhwa, Pakistan; 2Soil and Environmental Sciences, Faculty of Crop Production Sciences, The University of Agriculture, Peshawar, Khyber Pakhtunkhwa, Pakistan.

[email protected] 

Figure 1

Moisture content in the root zone and Rainfall. 

Figure 2

Volumetric soil moisture content observed vs simulated (2015). 

Figure 3

Volumetric soil moisture content observed vs simulated (2016). 

Figure 4

Nitrate leaching actual vs HYDRUS predicted (2015) 

Figure 5

Nitrate leaching actual vs HYDRUS predicted (2016). 

Figure 6

Simulated Nitrate leaching under increasing irrigation conditions and full Nitrogen dose. 

Figure 7

Simulated Nitrate leaching under full irrigation and increasing Nitrogen doses. 

Figure 8

Simulated Nitrate leaching under 90% irrigation and different Nitrogen doses (100 and 55% of recommended dose). 

Figure 9

Simulated Nitrate leaching under 80% irrigation and different Nitrogen doses (100 and 55% of recommended dose). 

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Sarhad Journal of Agriculture

September

Vol.40, Iss. 3, Pages 680-1101

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