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  • General
  • Systems
    • Greenhouses
      • Ventilation
      • Cooling
    • Open systems
    • Closed systems
  • Nutrients
    • Fertilizers
    • Macro nutrients
    • Micro nutrients
    • pH
    • Salt content
  • Crops
    • Seedlings
    • Tomatoes
    • Sweet peppers
    • Cucumbers
    • Green beans
    • Lettuce
    • Spinach
  • Crop protection
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    • Pests
    • Physiological disorders
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  • General
  • Systems
    • Greenhouses
      • Ventilation
      • Cooling
    • Open systems
    • Closed systems
  • Nutrients
    • Fertilizers
    • Macro nutrients
    • Micro nutrients
    • pH
    • Salt content
  • Crops
    • Seedlings
    • Tomatoes
    • Sweet peppers
    • Cucumbers
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greenhouse hydroponic commercial lettuce crisp iceberg

Lettuce deficiency and toxicity symptoms of macro and micro elements

  • Lettuce
  • Macro nutrients
  • Micro nutrients
  • Physiological disorders
It is often quite difficult to identify a deficiency or toxicity symptom in the field because they never really occur as a single element deficiency...
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Jul 19
4
by Antonius Lecuona
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The relationship between acid and sugar content in the taste of fruit.

  • General
The intricate relationship between the fruit’s acidity and sugar content affects how it tastes. A modest role is also played by other substances such as...
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Feb 14
0
by Antonius Lecuona
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greenhouse virus diseases

Source of viruses in a greenhouse

  • Crop protection
  • Diseases
  • Pests
Everyone has become more knowledgeable about the spread of viruses and the diseases they cause. Just like the COVID virus, we have to understand the...
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Apr 11
0
by Antonius Lecuona
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Nutrient content of water soluble hydroponic fertilizers

  • Fertilizers
The nutrient content of water soluble hydroponic fertilizers is not always clearly indicated on packaging.  It is fine that fertilizer companies take control out of...
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Jan 29
2
by Antonius Lecuona
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The basic principles of a good spray program

  • Crop protection
  • Diseases
  • Pests
Well planned spray programs are more effective than unplanned, random chemical applications. Have you ever considered spraying when there is no pests or diseases? Poorly...
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Jun 13
1
by Antonius Lecuona
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Angular leaf spot

  • Diseases
The disease is found in conditions if high humidity, especially in poor ventilated greenhouses or where the ventilation is not controlled properly. Optimum temperature for...
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Dec 9
2
by Antonius Lecuona
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Photoperiodic effect on flowering day length night growth

The effect of low intensity radiation on flowering

  • General
Changing the length of the dark and light periods is another way of growth control. It is an important aspect of greenhouse culture, especially flowers....
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Aug 11
1
by Antonius Lecuona
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The effect of high intensity radiation on plant growth in greenhouses.

  • Cultivation
High intensity radiation is more common in equatorial regions than cold weather climates. This is because of the angle the sun rays hit the soil...
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Apr 11
1
by Antonius Lecuona
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The effect of radiation on growth and yield

  • Cultivation
Understanding the effect of radiation on plants will help identify weaknesses in your greenhouse.  The effect of radiation can be divided into three parts; its...
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Apr 10
2
by Antonius Lecuona
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Basic pest and disease resistance management strategies in greenhouses

  • Diseases
  • Pests
Resistance to chemicals is due to the intense selection pressure exerted on the population that is controlled. There is only a limited number of chemicals...
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Jan 19
2
by Antonius Lecuona
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Understanding the greenhouse environment

  • Greenhouses
The protected greenhouse environment The greenhouse environment is designed to allow plants to perform close to their genetic optimum so that the grower achieves maximum...
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Jan 13
2
by Antonius Lecuona
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Trellising greenhouse cucumbers vertically or in a "V"-shape

Trellising cucumbers in greenhouses

  • Cucumbers
Trellising and training of greenhouse cucumbers Trellising of cucumbers should not be confused with pruning. They do go hand in hand, but are very different....
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May 12
2
by Antonius Lecuona
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hydroponics farming process start first

How do I start a hydroponic farm

  • General
A frequent and legit question to ask from all parts of the world; how do I start a hydroponic farm or business. Deep down in...
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Nov 15
3
by Antonius Lecuona
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cucumbers hydroponic greenhouse cucumbers commercial farming

Understanding nitrogen dynamics during cucumber growth season

  • Cucumbers
We all know the basics of nitrogen in plants. The good and the bad. Every grower and student knows nitrogen is important for good looking...
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Sep 9
1
by Antonius Lecuona
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Optimizing income of your farm using Fibonacci

  • General
This is something that has been on my mind for a long time.  So many growers ask me what is the best combination of crops...
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Mar 24
4
by Antonius Lecuona
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Fertigation of cucumbers – the basics

  • Cucumbers
Cucumbers are sensitive to water stress (to little water) and to water logging (over watering).  Any of these two conditions will reduce plant vigour and...
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Mar 3
1
by Antonius Lecuona
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Keywords

Bacterial canker Bacterial wilt BER Botrytis Calcium closed systems Cooling Designs Drippers Early blight Fertilizers Filters Flow-rate fruit Fungus General Greenhouses Gullies Heating Humidity Insects Irrigation Late blight Light Location Micro-elements NFT Nutrients Open systems Organics Peppers pH Physiological disorders Powdery mildew Pruning/Trellising Pumps Quality radiation Roots Seedlings Stock solutions Structures Tanks Temperature Ventilation

Recent articles

  • The relationship between acid and sugar content in the taste of fruit.
  • Source of viruses in a greenhouse
  • Nutrient content of water soluble hydroponic fertilizers
  • The basic principles of a good spray program
  • Angular leaf spot

Recommended Book

Most read posts this week

  • How to grow spinach hydroponicallyHow to grow spinach hydroponically (28,178)
  • How do I start a hydroponic farmHow do I start a hydroponic farm (20,249)
  • Planting density of various vegetable crops in hydroponic systemsPlanting density of various vegetable crops in… (15,779)
  • Pruning cucumbers in greenhousesPruning cucumbers in greenhouses (14,490)
  • Formulating a hydroponic nutrient solution - Part I: Macro NutrientsFormulating a hydroponic nutrient solution –… (13,254)
  • What type of crops are suitable for hydroponicsWhat type of crops are suitable for hydroponics (11,884)
  • How to adjust the pH in hydroponic nutrient solutionsHow to adjust the pH in hydroponic nutrient solutions (11,134)
  • What is the difference between LDPE and HDPE Irrigation pipesWhat is the difference between LDPE and HDPE… (9,733)
  • Greenhouse structure - what worksGreenhouse structure – what works (9,404)
  • Lettuce deficiency and toxicity symptoms of macro and micro elementsLettuce deficiency and toxicity symptoms of macro… (9,074)
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Keywords

Bacterial canker Bacterial wilt BER Botrytis Calcium closed systems Cooling Designs Drippers Early blight Fertilizers Filters Flow-rate fruit Fungus General Greenhouses Gullies Heating Humidity Insects Irrigation Late blight Light Location Micro-elements NFT Nutrients Open systems Organics Peppers pH Physiological disorders Powdery mildew Pruning/Trellising Pumps Quality radiation Roots Seedlings Stock solutions Structures Tanks Temperature Ventilation

Recent articles

  • The relationship between acid and sugar content in the taste of fruit.
  • Source of viruses in a greenhouse
  • Nutrient content of water soluble hydroponic fertilizers
  • The basic principles of a good spray program
  • Angular leaf spot

Recommended Book

Most read posts this week

  • How to grow spinach hydroponicallyHow to grow spinach hydroponically (28,178)
  • How do I start a hydroponic farmHow do I start a hydroponic farm (20,249)
  • Planting density of various vegetable crops in hydroponic systemsPlanting density of various vegetable crops in… (15,779)
  • Pruning cucumbers in greenhousesPruning cucumbers in greenhouses (14,490)
  • Formulating a hydroponic nutrient solution - Part I: Macro NutrientsFormulating a hydroponic nutrient solution –… (13,254)
  • What type of crops are suitable for hydroponicsWhat type of crops are suitable for hydroponics (11,884)
  • How to adjust the pH in hydroponic nutrient solutionsHow to adjust the pH in hydroponic nutrient solutions (11,134)
  • What is the difference between LDPE and HDPE Irrigation pipesWhat is the difference between LDPE and HDPE… (9,733)
  • Greenhouse structure - what worksGreenhouse structure – what works (9,404)
  • Lettuce deficiency and toxicity symptoms of macro and micro elementsLettuce deficiency and toxicity symptoms of macro… (9,074)
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