- Lead Auditor
- Quality Assurance Team EA Region - Antwerp - Quality Assurance Supervisor
- Medior Sales Engineer - Netherlands
- General Manager Australia
- Chief plant protection agronomist
- Сhief agronomist
- Head of Sales for Mexico and Latin America
- Finance Manager for a Leading International Fresh Produce Business
- Sales Consultants Fertilizer - various European countries
- Product & Efficiency Manager - Role Based in Holland with regular trips to the UK
Top 5 -yesterday
- Australian agriculture groups join together to voice concerns over harvest workforce plans
- From knife and boots to the excitement of the greenhouse
- Mushrooms a weapon in fight against global vitamin D shortage
- New facility to research the farm of the future
- French growers get new option for biological crop protection
Top 5 -last month
Top 5 -last week
- Australia: Bryony Hackett appointed General Manager at AIS Greenworks
- Driscoll's responds to 'slave-labor' claims at their Mexico operations
- Application Pro Manager Mastercourse Vegetables in full swing
- Can the Russian greenhouse industry overcome the challenges?
- "We believe in a co-creative approach within the greenhouse horticulture sector"
How to identify a calcium deficiency in aquaponics
Calcium occurs in aquaponic systems as Ca²+ (an ionic form) and interacts in an interesting way with potassium and magnesium, which you may remember from those articles. So what does calcium do?
Calcium is critical in the plant growth cycle. It is important for regulating osmotic pressure (keeping the plant cells full of water), and for holding cell walls together. Think of it as the element that glues the cell walls together and keeps them structurally sound.
Calcium is a common nutrient in aquaponic systems and is not usually deficient as a result of pH levels (although if you run very low pH, it can impact availability) as is the case with some of the other plant nutrients.
Most water is fairly hard (which means it contains lots of minerals, including calcium and magnesium carbonates), so calcium enters the system in the form of calcium carbonates every time the grower tops off the water.
Read more at Upstart University (Nate Storey)
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