Issue of low crop yields
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Tetsuro Kikuchi
Jun 19, 2025, 3:35:19 PM6/19/25
to SWAT+ Editor
Hello,
I'm running SWAT+ (rev. 61.0.1) with Editor (3.0.2) to simulate nitrate nitrogen outflow (no3_out) from a small agricultural watershed.
I've got a problem of nitrogen stress for crops (see Plant Growth_20250612.jpg attached) and low crop yields in my simulation even though I should have adequately set the management schedules, including the rates of fertilizer applications, based on the actual conditions. For example, the simulated yield of summer sugarcane ("sugc_smmr1" and "sugc_smmr2" in Land Use Summary 2_20250612.jpg attached; around 6 t/ha) was about one-twelfth of the average yield in the target region.
I'd greatly appreciate it if you could provide possible causes of this issue and solutions for them.
The corresponding TxtInOut file is also attached.
Tetsuro Kikuchi
I'm running SWAT+ (rev. 61.0.1) with Editor (3.0.2) to simulate nitrate nitrogen outflow (no3_out) from a small agricultural watershed.
I've got a problem of nitrogen stress for crops (see Plant Growth_20250612.jpg attached) and low crop yields in my simulation even though I should have adequately set the management schedules, including the rates of fertilizer applications, based on the actual conditions. For example, the simulated yield of summer sugarcane ("sugc_smmr1" and "sugc_smmr2" in Land Use Summary 2_20250612.jpg attached; around 6 t/ha) was about one-twelfth of the average yield in the target region.
I'd greatly appreciate it if you could provide possible causes of this issue and solutions for them.
The corresponding TxtInOut file is also attached.
Tetsuro Kikuchi
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