Guy Sela

Guy Sela is an agronomist and a chemical engineer at his innovative software company, Smart Fertilizer (smart-fertilizer.com), which provides fertilizer management solutions. Applying his background in water treatment, he has led a variety of projects on reverse osmosis, water disinfection, water purification, and providing high-quality water for irrigation.

Articles by Guy Sela


Achieving Plug Plant Perfection Achieving Plug Plant Perfection Achieving Plug Plant Perfection Achieving Plug Plant Perfection


Plug plants production present many challenges to growers. Seedlings are sensitive, plug volume is small and any mistake might cause...

Understanding the Five Most Important Parameters on Your Soil Test Report Understanding the Five Most Important Parameters on Your Soil Test Report Understanding the Five Most Important Parameters on Your Soil Test Report Understanding the Five Most Important Parameters on Your Soil Test Report


Considering sending your soil off to get tested at the lab? Good idea! Professional soil testing is highly recommended as it is more...

How to Manage Soil Fertility How to Manage Soil Fertility How to Manage Soil Fertility How to Manage Soil Fertility


From an agricultural point of view, a fertile soil is one that can provide adequate amounts of nutrients to the garden to ensure optimal...

The Future of Maximizing Yields: Combining Research and Big Data to Optimize Fertilization The Future of Maximizing Yields: Combining Research and Big Data to Optimize Fertilization The Future of Maximizing Yields: Combining Research and Big Data to Optimize Fertilization The Future of Maximizing Yields: Combining Research and Big Data to Optimize Fertilization


With a rapidly growing population, humanity is facing the challenge of how to feed itself in a sustainable way

Water Wisely: Irrigation Scheduling in Soilless Culture Water Wisely: Irrigation Scheduling in Soilless Culture Water Wisely: Irrigation Scheduling in Soilless Culture Water Wisely: Irrigation Scheduling in Soilless Culture


Proper watering practices are vital to the health and well-being of your plants. Both overwatering and under-watering can cause a whole...

Growing for Health: Fertilizer Recommendations Growing for Health: Fertilizer Recommendations Growing for Health: Fertilizer Recommendations Growing for Health: Fertilizer Recommendations


So, the results of your soil test are in and it’s time to tweak the routine. It’s likely you’ve received a few suggestions on how to amend...

Evaluating the Electrical Conductivity of Water Evaluating the Electrical Conductivity of Water Evaluating the Electrical Conductivity of Water Evaluating the Electrical Conductivity of Water


The electrical conductivity of water is actually a measure of salinity. It’s important to monitor its levels in your water supply because...

The Essential Plant Nutrients The Essential Plant Nutrients The Essential Plant Nutrients The Essential Plant Nutrients


Certain nutrients are required for the growth of most plants. Guy Sela explains

How to Prevent Clogging of Emitters in Drip Irrigation How to Prevent Clogging of Emitters in Drip Irrigation How to Prevent Clogging of Emitters in Drip Irrigation How to Prevent Clogging of Emitters in Drip Irrigation


A micro-irrigation system should be properly planned and managed in order to fully benefit from its many advantages. One of the main...

A Guide to Foliar Feeding A Guide to Foliar Feeding A Guide to Foliar Feeding A Guide to Foliar Feeding


Many growers believe that foliar feeding is favorable over soil application and it is associated with higher yields and better fruit...

Understanding PPM in Soil Understanding PPM in Soil Understanding PPM in Soil Understanding PPM in Soil


The over-used expression, ppm, is short-hand for parts per million, and it’s one of the most common items that shows up on soil test...

Magnesium in Soil Magnesium in Soil Magnesium in Soil Magnesium in Soil


Magnesium deficiency, like any deficiency, leads to a reduction in yields. Read on to discover why this element is so important to have...

Feeling Low: Problems with Acidic Soil Feeling Low: Problems with Acidic Soil Feeling Low: Problems with Acidic Soil Feeling Low: Problems with Acidic Soil


Many growers have a problem of low pH in their soil or growing media. Some soils are acidic by nature and, in other cases, low pH is the...

Preventing the Negative Effect of Water Salinity on Soil Preventing the Negative Effect of Water Salinity on Soil Preventing the Negative Effect of Water Salinity on Soil Preventing the Negative Effect of Water Salinity on Soil


Salt buildups lead to imbalanced concentrations, so it’s important to know the amount of water you need to add as a leach

Choosing Chlorine Chemicals for Water Disinfection Choosing Chlorine Chemicals for Water Disinfection Choosing Chlorine Chemicals for Water Disinfection Choosing Chlorine Chemicals for Water Disinfection


There is more than one type of chlorine chemical out there, and each comes with its own set of pros and cons when it comes to disinfecting...

Attaining the Right Ammonium to Nitrate Ratio Attaining the Right Ammonium to Nitrate Ratio Attaining the Right Ammonium to Nitrate Ratio Attaining the Right Ammonium to Nitrate Ratio


Nitrogen is one of the three most essential plant nutrients, and plants absorb this element in either the ammonium or nitrate forms. Giving...

Cations and Anions: Is Your System Balanced? Cations and Anions: Is Your System Balanced? Cations and Anions: Is Your System Balanced? Cations and Anions: Is Your System Balanced?


Balance has a number of different meanings when it comes to your system’s water, nutrient solution and soil. One example is the...

Can Mineral Nutrition Affect Plant Disease? Can Mineral Nutrition Affect Plant Disease? Can Mineral Nutrition Affect Plant Disease? Can Mineral Nutrition Affect Plant Disease?


The use of chemicals on plants raises environmental and food safety concerns, as well as creates economical consequences. The good news is...

How to Successfully Choose Growing Media How to Successfully Choose Growing Media How to Successfully Choose Growing Media How to Successfully Choose Growing Media


Choosing the right growing medium for your crop is crucial to a great yield. Here, Guy Sela runs through all your choices of media...

Preparation of Fertilizer Stock Solutions for Hydroponics Preparation of Fertilizer Stock Solutions for Hydroponics Preparation of Fertilizer Stock Solutions for Hydroponics Preparation of Fertilizer Stock Solutions for Hydroponics


Stock solutions are time- and labor-saving liquids that also offer gardeners a lot of control. Here’s how to go about making your own

Irrigation Water Quality Irrigation Water Quality Irrigation Water Quality Irrigation Water Quality


All the care you take to ensure the health of your plants will have gone to waste if you give them poor-quality water to drink—Guy Sela...

Plug  Plants: Testing and Monitoring Their Nutritional Status Plug  Plants: Testing and Monitoring Their Nutritional Status Plug  Plants: Testing and Monitoring Their Nutritional Status Plug  Plants: Testing and Monitoring Their Nutritional Status


Guy Sela takes us through nutritional testing and monitoring procedures for those tiny precious seedlings

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