Assessing the effectiveness of split fertilization and cover crop cultivation in order to conserve soil and water resources and improve crop productivity

Maharjan, Ganga Ram; Ruidisch, Marianne; Shope, Christopher L.; Choi, Kwanghun; Huwe, Bernd; Kim, Seong Joon; Tenhunen, John; Arnhold, Sebastian

doi:10.1016/j.agwat.2015.10.005

Cited by 29 publications

(30 citation statements)

References 54 publications

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“…The split applications by 2 or 3 times through the mulching hole can provide the best reduction of T-N and T-P discharge loads. This executable practice by farmers can lead to the economic benefits in terms of greatly decreasing fertilizer inputs as well as ecological benefits by reducing substantially the stream and groundwater pollutions (Maharjan et al, 2016). Ruidisch et al (2013a) studied the combination of a fertilizer rate of 150 kg/ha, plastic mulched ridges, fertilizer placement only in the ridges and split applications of fertilizer and showed a leaching rate of only 5.4% of the total NO 3 − fertilizer input.…”

Section: Discussionmentioning

confidence: 99%

“…The daily streamflow and stream water quality data (2009)(2010)(2011) at three locations (L1, L2, and L3) were obtained from field measurements for SWAT model calibration and validation. The main indicators of stream water quality are sediment, T-N (total nitrogen obtained as the sum of nitrate and particulate organic nitrogen losses), and T-P (total phosphorus obtained as the sum of orthophosphorus and particulate phosphorus losses) loads Maharjan et al, 2016).…”

Section: General Data For Swat Modelingmentioning

confidence: 99%

“…To reduce nonpoint source (NPS) pollution occurring in the agricultural basin in highlands effectively, best management practices (BMPs) can be used (Gitau et al, 2004;Zhen et al, 2004;Maharjan et al, 2016). The BMPs can be divided into non-structural and structural methods.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have suggested the effectiveness for the reduction of NPS pollution discharges using BMPs (Rao et al, 2009;Zhang and Zhang 2011;Dechmi and Skhiri 2013;Strauch et al, 2013;Park et al, 2014). Maharjan et al (2016) evaluated the BMPs of split fertilizer application (SF), cover crop cultivation (CC), and the combination (SFCC) at the watershed of this study using SWAT. They found that the SF scenario reduced nitrate pollution while sediment compared to single fertilizer application.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of executable best management practices in Haean highland agricultural catchment of South Korea using SWAT

Jang

Ahn

Kim

2017

Agricultural Water Management

Self Cite

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Section: Discussionmentioning

confidence: 99%

Section: General Data For Swat Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of executable best management practices in Haean highland agricultural catchment of South Korea using SWAT

Jang

Ahn

Kim

2017

Agricultural Water Management

Self Cite

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“…Due to fertilizer being the main source of agriculture nonpoint source pollution, the most effective and essential way to depress NSP is to reduce fertilization use. Fertilizer reduction is one of the most commonly implemented BMPs; several studies have indicated the benefits of this practice [33,34]. These studies showed that different methods can be adopted to reduce fertilizer, which included examples of utilizing biological fertilizer instead of traditional fertilizer.…”

Section: Fertilizer Reduction (Fr)mentioning

confidence: 99%

Assessing the Impacts of Best Management Practices on Nonpoint Source Pollution Considering Cost-Effectiveness in the Source Area of the Liao River, China

Wang

Bian

Lao

et al. 2019

Water

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Agricultural nonpoint source pollution has been a major influential factor on the deterioration of water quality in the Liao River source area. Best management practices (BMPs), as a comprehensive pollution prevention system designed to reduce the impacts of agricultural activities and improve water quality, has been considered one of the most effective solutions for nonpoint source pollution control. However, economic cost has been an important element for screening the implementation of BMPs. Both pollution reduction and capital expenditure need to be resolved with the actual situation. A water quality model such as the Soil and Water Assessment Tool (SWAT) and empirical cost algorithm are important tools to assess the cost-effectiveness of the effects of BMPs on nonpoint source pollution. In this study, BMP scenarios including buffer strips (BSs), fertilizer reduction (FR), forest land increase (FLI), grassland increase (GLI), and their combination were implemented using the SWAT model; furthermore, the efficiency of their pollutants reduction and costs benefit were estimated in the watershed. The results showed that combined BMPs have better control effects than a single BMP, with “BS20 (widths 20 m) + FR15 (fertilization reduction 15%) + FLI (forest land increase)” arriving at the greatest loads reduction in the critical periods. From environmental and economic perspectives, the cost-effectiveness of interception measures is higher than that of the source control measures. The results indicated that BS was the most environmentally friendly practice, and FR was the most economically efficient out of all the BMPs. Regarding land-use changes, FLI was more environmentally friendly, and GLI was more economically efficient. The most economical and effective BMPs can be designated as follows: BS1.5 (widths 1.5 m) and FR15 (fertilization reduction 15%). Therefore, due to possible differences in government policies, it is important to consider an integrated approach for all the relevant actors and seek sustainable environmental and economic development.

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Identification of priority management practices for soil erosion control through estimation of runoff and sediment yield using soil and water assessment tool on Salma watershed in Afghanistan

Sadiqi

Hong

Nam

2022

Irrigation and Drainage

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To reduce reservoir sedimentation, sustainable water resource management necessitates the identification and control of significant erosion zones. The SWAT (soil and water assessment tool) distributed model was used to analyse runoff and sediment output, identify major erosion basins in the Salma dam, and assess best management practices for reducing sediment transport to reservoirs in order to extend their usable life. The groundwater delay and groundwater discharge regression for water discharge and soil depth, and Manning's coefficient of channel roughness for sediment yield, were the most sensitive factors. In the temporal assessment for the calibration and validation periods, SWAT reproduced the simulated daily flows and sediment loads. According to the water balance, actual evapotranspiration predominated, accounting for around 42% of the basin's average annual precipitation. The model revealed that the majority of the catchments were in the very severe erosion class, with extremely high‐prone catchments in the minority, demonstrating the model's potential for implementing and evaluating the effects of management options. According to the simulation exclusion fence, streambank stabilization, conservation crop rotation, check dams, brush layering, brush mattress and terracing can all be utilized to minimize soil erosion in the research areas. This research can be used to formulate a strategy for reducing sediment loads in the Salma as well as similar watersheds in Afghanistan.

show abstract

Assessing the effectiveness of split fertilization and cover crop cultivation in order to conserve soil and water resources and improve crop productivity

Cited by 29 publications

References 54 publications

Evaluation of executable best management practices in Haean highland agricultural catchment of South Korea using SWAT

Evaluation of executable best management practices in Haean highland agricultural catchment of South Korea using SWAT

Assessing the Impacts of Best Management Practices on Nonpoint Source Pollution Considering Cost-Effectiveness in the Source Area of the Liao River, China

Identification of priority management practices for soil erosion control through estimation of runoff and sediment yield using soil and water assessment tool on Salma watershed in Afghanistan

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