- Grower Support Manager (Blueberries) - Harare, Zimbabwe
- Finance Director - Ukraine
- Sales Manager and Quality Assurance Supervisor
- Breeder (MSc) - Hann. Münden, Germany
- Buitendienst Medewerker - België
- Assistant Grower Manager Tomato & Capsicums - Malaysia Highlands
- Assistant Grower Manager Lettuce & Herbs - Malaysia Highlands
- Trainee Production Management - starting location Ethiopia
- Сhief technologist, Tula region - Russia
- Сhief technology officer, Tula region - Russia
Top 5 -yesterday
- CAN (BC): "We have discovered the cannabis industry is not quite ready for outsourcing plant propagation"
- "Every time we are surprised by the ideas of our clients"
- Turkey: Tomato grower goes bananas
- It’s possible to grow more cucumbers via AI
- Digestate as alternative substrate for soil-less lettuce farming
Top 5 -last week
Top 5 -last month
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:
- 2018-05-31 "Algae time again!"
- 2018-05-30 "EU Commission proposal on water re-use "step in right direction"
- 2018-05-29 Efficient utilization of water in plants
- 2018-05-28 US (DE): Flooding, waterlogged soils, and effects on vegetable crops
- 2018-05-25 Large scale fresh water supply Low Netherlands step closer
- 2018-05-24 Saudi Arabia: Ministry shows interest in biosaline agriculture
- 2018-05-23 US (MI): Irrigation considerations for the small vegetable farm
- 2018-05-22 EU Aquaponics Association launched
- 2018-05-21 Spanish growers to master durable water and nutrient usage
- 2018-05-18 Video: Combining water reuse and aquifer storage and recovery
- 2018-05-17 Tank supplier catches the eye of the wastewater industry
- 2018-05-16 Podcast about water challenges
- 2018-05-15 Irrigation water quality and soil structural stability
- 2018-05-14 Data increase inversely proportional to water usage
- 2018-05-11 How much do they really need?
- 2018-05-10 US (CT): Growing with aquaponics at UConn
- 2018-05-09 "Increase outputs and keep irrigation lines clear"
- 2018-05-08 Innovative techniques for sustainable water use in crops
- 2018-05-07 It's all about irrigation at the International Sustainable Irrigation Expo
- 2018-05-03 "Spain: "More needs to be done with less water"