Field capacity water as influenced by Na and EC: Implications for subsurface drainage

He, Yangbo; DeSutter, Thomas M.; Casey, Frank; Clay, David E.; Franzen, David W.; Steele, Dean D.

doi:10.1016/j.geoderma.2015.01.020

Cited by 28 publications

(19 citation statements)

References 31 publications

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“…Salinity and sodicity have been long‐standing problems and are increasing in the region (Birru et al., 2019). Salinity and sodicity can cause soil crusting, poor water infiltration, very low yields, and high erosion rates (Dregne, 1976), and cropping should be avoided when the exchangeable sodium percentage exceeds 5 (He, DeSutter, & Clay, 2013, 2015, 2018). Many organic farms are extensive and located in remote, low rainfall areas where access to organically allowable and affordable inputs is limited (Carr et al., 2012b; Reeve, Endelman, Miller, & Hole, 2012; USDA NASS 2017b).…”

Section: Dual‐use Cover/green Manure Cropsmentioning

confidence: 99%

Green and animal manure use in organic field crop systems

et al. 2020

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Dual-use cover/green manure (CGM) crops and animal manure are used to supply nitrogen (N) and phosphorus (P) to organically grown field crops. A comprehensive review of previous research was conducted to identify how CGM crops and animal manure have been used to meet N and P needs of organic field crops, and to identify knowledge gaps to direct future research efforts. Results indicate that: (a) CGM crops are used to provide N to subsequent cash crops in rotations; (b) CGM-supplied N generally can meet field crop needs in warm, humid regions but is insufficient for organic grain crops grown in cool and sub-humid regions; (c) adoption of conservation tillage practices can create or exacerbate N deficiencies; (d) excess N and P can result where animal manures are accessible if application rates are not carefully managed; and (e) integrating animal grazing into organic field crop systems has potential benefits but is generally not practiced. Work is needed to better understand the mechanisms governing the release of N by CGM crops to subsequent cash crops, and the legacy effects of animal manure applications in cool and sub-humid regions. The benefits and synergies that can occur by combining targeted animal grazing and CGMs on soil N, P, and other nutrients should be investigated. Improved communication and networking among researchers can aid efforts to solve soil fertility challenges faced by organic farmers when growing field crops in North America and elsewhere.

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Section: Dual‐use Cover/green Manure Cropsmentioning

confidence: 99%

Green and animal manure use in organic field crop systems

et al. 2020

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“…As regards the effect on soil properties, the literature shows that the Na concentration in soil layers can affect the dispersion of clay particles [69], the soil water characteristics [70], soil aggregate stability [71], and the formation of soil crusts [72]. Dispersion of soil particles may cause clogging of soil pores, which reduces the soil permeability, soil porosity, and soil water conductivity [73].…”

Section: Sodium Adsorption Ratiomentioning

confidence: 99%

A Tool for the Evaluation of Irrigation Water Quality in the Arid and Semi-Arid Regions

Bortolini¹,

Maucieri

Borin

2018

Agronomy

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Abstract:In the Mediterranean arid and semi-arid regions, large amounts of low quality waters could be used for crop irrigation, but the adoption of articulated classifications with too rigid quality limits can often reduce the recoverable quantities of water and make the monitoring of water quality too much expensive. Therefore, an evaluation of irrigation water quality based on only a few crucial parameters, which consider the crop species to be irrigated and the type of irrigation system and management adopted, can be an easy and flexible method for maximizing the reuse of wastewater and low-quality water for agricultural purposes. In this view, an irrigation water quality tool (IWQT) was developed to support farmers of arid and semi-arid regions on evaluating the use of low quality water for crop irrigation. The most significant and cheapest parameters of irrigation water quality were identified and clustered in three quality classes according to their effects on crop yield and soil fertility (agronomic quality indicators), human health (hygiene and health quality indicators), and irrigation systems (management quality indicators). According to IWQT parameters, a tool reporting a series of recommendations, including water treatment types, was implemented to guide farmers on the use of low quality irrigation water.

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“…In this example, it was likely that the combined impact of Ca 2+ and EC helped maintain the soil structure (Sanders, 1988;He et al, 2013). However, if the EC of the percolating water is low, drainage of soluble salts can contribute to soil swelling and the formation of an impermeable soil layer (Pons et al, 2000;He et al, 2015).…”

Section: Soil Fertility and Crop Nutritionmentioning

confidence: 99%

“…Previous research did not designed to answer these questions, because they did not consider spatial variability, nor did they consider how interactions between SAR, EC, and water flow impacts restoration success (Rasouli et al, 2013;He et al, 2015). These knowledge gaps may be partially linked to the use of disturbed soil (Jury et al, 1979;He et al, 2015). For example, McIntyre (1979) used air-dried ground soil and reported that there was a relationship between hydraulic conductivity and ESP.…”

Section: Soil Fertility and Crop Nutritionmentioning

confidence: 99%