- Flower Bulb and Perennial Sales Position - Portland (Oregon) USA
- Plant Production Scientist - Brooklyn (NY) USA
- Greenhouse Assistant Grower - Abbotsford (B.C.) Canada
- Technical Sales Representative - South Western Ontario, Canada
- Farm Manager - West Africa
- Managing Agronomist - Surinam
- Vegetal Material Programme Leader - Cisterna di Latina (Latium), Italy
- Head of Sales North America - Sacramento (CA) USA
- Inkoop Specialist Holland Product - Netherlands
- Vegetable Grower - Australia
Top 5 -yesterday
Top 5 -last month
Top 5 -last week
Irrigation water quality and soil structural stability
Because of the dominance of sodium salts in many sources of irrigation water, parameters related to sodium such as exchangeable sodium percentage (ESP) of soils and sodium adsorption ratio (SAR) of soil solutions have been commonly used to study the effects of sodium in irrigation water on soil structural stability. Quirk and Schofield’s concept of ‘threshold electrolyte concentration’ (TEC) has shown the importance of electrolytes in preventing the effects of sodium on soil structure.
Based on this concept, several models have been proposed to relate ESP or SAR with EC to predict the possible impacts of irrigation water on soil structural stability. However, many research reports indicate that this relationship varies with soils, and a given model is not suitable for all types of soils. Further, the effects of potassium and magnesium in the processes leading to clay dispersion are disregarded in these models.
A new essay analyses all the factors involved in the structural failure of soils with different cationic composition, identifies the defects in these TEC models, and re-defines TEC on the basis of new insights on dispersive and flocculating charges of soils. The review does not deal with EC effects on crops nor the role of contaminant ions not involved with soil structural stability.
Access the full study at Agronomy.
Publication date :
Receive the daily newsletter in your email for free | Click here
Other news in this sector:
- 05/31/2018 "Algae time again!"
- 05/30/2018 "EU Commission proposal on water re-use "step in right direction"
- 05/29/2018 Efficient utilization of water in plants
- 05/28/2018 US (DE): Flooding, waterlogged soils, and effects on vegetable crops
- 05/25/2018 Large scale fresh water supply Low Netherlands step closer
- 05/24/2018 Saudi Arabia: Ministry shows interest in biosaline agriculture
- 05/23/2018 US (MI): Irrigation considerations for the small vegetable farm
- 05/22/2018 EU Aquaponics Association launched
- 05/21/2018 Spanish growers to master durable water and nutrient usage
- 05/18/2018 Video: Combining water reuse and aquifer storage and recovery
- 05/17/2018 Tank supplier catches the eye of the wastewater industry
- 05/16/2018 Podcast about water challenges
- 05/15/2018 Irrigation water quality and soil structural stability
- 05/14/2018 Data increase inversely proportional to water usage
- 05/11/2018 How much do they really need?
- 05/10/2018 US (CT): Growing with aquaponics at UConn
- 05/09/2018 "Increase outputs and keep irrigation lines clear"
- 05/08/2018 Innovative techniques for sustainable water use in crops
- 05/07/2018 It's all about irrigation at the International Sustainable Irrigation Expo
- 05/03/2018 "Spain: "More needs to be done with less water"