Saturday, May 14, 2011
Aeroponic potato
pH Formula
where aH+ is the activity of hydrogen ions in units of mol/L (molar concentration) |
pH is defined as a negative decimal logarithm of the hydrogen ion activity in a solution.
Sunday, May 8, 2011
Formula nutrient solutions for hydroponics
Formula Tumanov 1960 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
6-7 | 300 | 50 | - | 150 | - | 100 | 80 | 64 | 4 |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,5 | 0,05 | 0,1 | 0,5 | 0,02 |
Formula Kidson
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
5,5 | 340 | 54 | 35 | 234 | - | 208 | 57 | 114 | 75 |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,25 | 0,05 | 0,05 | 0,5 | 0,1 |
Formula Purdue
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 200 | 96 | - | 390 | 28 | 70 | 63 | 607 | - |
Fe | Mn | Cu | Zn | B | Mo |
20 | 0,3 | 0,02 | 0,05 | 0,5 | - |
Formula Schwartz Israel
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 124 | 43 | - | 312 | - | 98 | 93 | 160 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Schwartz California
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 160 | 48 | - | 200 | 15 | 196 | 31 | 147 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Schwartz New Jersey
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 180 | 55 | - | 90 | 20,5 | 126 | 71 | 96 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Schwartz South Africa
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 210 | 50 | - | 300 | - | 200 | 65 | - | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula CDA A
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 131 | 22 | - | 209 | 33 | 93 | 36,7 | 29,5 | 188 |
Fe | Mn | Cu | Zn | B | Mo |
1,7 | 0,8 | 0,035 | 0,094 | 0,46 | 0,027 |
Formula CDA В Saanichton
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 146 | 22 | - | 209 | 33 | 135 | 36,7 | 29,5 | 108 |
Fe | Mn | Cu | Zn | B | Mo |
1,7 | 0,8 | 0,035 | 0,094 | 0,46 | 0,027 |
Formula CDA С Canada
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 146 | 22 | - | 209 | 33 | 177 | 36,7 | 29,5 | - |
Fe | Mn | Cu | Zn | B | Mo |
1,7 | 0,8 | 0,035 | 0,094 | 0,46 | 0,027 |
Formula Dr. Pilgrim
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 272 | 54,3 | - | 400 | - | 143,4 | 93 | 237,5 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Dr. Pilgrim Elizabeth
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 204 | 40,7 | - | 300 | - | 107,6 | 69,75 | 178,1 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Dr. Pilgrim USA
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 136 | 27,15 | - | 200 | - | 71,7 | 46,5 | 118,75 | - |
Fe | Mn | Cu | Zn | B | Mo |
- | - | - | - | - | - |
Formula Dr. Resh
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 197 | 44 | - | 400 | 30 | 145 | 65 | 197,5 | - |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,5 | 0,03 | 0,05 | 0,5 | 0,02 |
Formula Dr. Resh University B.C.
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 148 | 33 | - | 300 | 20 | 110 | 55 | 144,3 | - |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,5 | 0,03 | 0,05 | 0,5 | 0,02 |
Formula Dr. Resh Vancouver 1971 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 98,5 | 22 | - | 200 | 10 | 80 | 40 | 83,2 | - |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,5 | 0,03 | 0,05 | 0,5 | 0,02 |
Formula Dr. Resh tropics, dry season, lettuce 1984 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 250 | 36 | - | 200 | 53 | 177 | 60 | 129 | - |
Fe | Mn | Cu | Zn | B | Mo |
5 | 0,5 | 0,03 | 0,05 | 0,5 | 0,02 |
Formula Dr. Resh tropics during the rainy season, lettuce 1984 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 150 | 50 | - | 150 | 32 | 115 | 50 | 52 | - |
Fe | Mn | Cu | Zn | B | Mo |
5 | 0,5 | 0,03 | 0,05 | 0,5 | 0,02 |
Formula Dr. Resh California, lettuce 1989-1993 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 200 | 40 | - | 210 | 25 | 165 | 50 | 113 | - |
Fe | Mn | Cu | Zn | B | Mo |
5 | 0,5 | 0,1 | 0,1 | 0,5 | 0,05 |
Formula Dr. Resh Florida, cucumber (0-10 days) 1990 year
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 100 | 20 | - | 175 | 3 | 128 | 27 | 26 | - |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,8 | 0,07 | 0,1 | 0,3 | 0,03 |
Formula Dr. Resh Florida cucumbers at 10-day before the first ovary
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 220 | 40 | - | 350 | 7 | 267 | 55 | 53 | - |
Fe | Mn | Cu | Zn | B | Mo |
3 | 0,8 | 0,07 | 0,1 | 0,3 | 0,03 |
Formula Dr. Resh Florida, the further growth of cucumber
pH | Ca++ | Mg++ | Na+ | K+ | NH4+ | NO3- | PO4- | SO4= | Cl- |
- | 200 | 45 | - | 400 | 7 | 255 | 55 | 82 | - |
Fe | Mn | Cu | Zn | B | Mo |
2 | 0,8 | 0,1 | 0,33 | 0,4 | 0,05 |
Secrets of Plant Propagation By Lewis Hill
Review
"…this guide is a pleasure to read and a dependable source of suggestions for those who want to discover the satisfactions of real do- it- yourself programs." - Publishers Weekly
" Vermont nurseryman, Lewis Hill can keep you glued to your seat engrossed in a subject your not even sure you need to know- a talent much in evidence…" - The New York Times
" This book is well designed, full of good graphics and written in a personable style that makes for a pleasant reading…"- Sacramento Bee
" …the book is free of the mumbo jumbo that sometimes accompanies these subjects." - Hartford Courant
" Simply written, easy- to- follow, how- to-do- it books are worth their weight in rubies. Lewis Hill's Secrets of Plant Propagation is one of these books. - Hartford Cournat
" I find the information very clear. Numerous illustrations make the directions easy to follow."
- New York Post
" Detailed recommendations are listed for propagating…leaving the reader uncertain whether to finish the book to dash off, pruner's in hand to attempt the techniques so well described." - New York Times
" Hill has plenty of information to share with the hobbyist or budding nursery owner." - Booklist
“Loaded with information and expertise, this masterful work is recommended for the serious gardener.” – Spa Management
Hydroponic Food Production Book by Howard M Resh Ph.D.
The methods of growing comercial hydroponic lettuce.
Short film about growing lettuce in industrial quantities
Thursday, May 5, 2011
LED Grow Lights
LED lights for plants growing |
According to the inverse square law, the intensity of light radiating from a point source (in this case a bulb) that reaches a surface is inversely proportional to the square of the surface's distance from the source. So if an object is twice as far away, it receives only 1/4 the light. This is a serious hurdle for indoor growers, and many techniques are employed to use light as efficiently as possible. Reflectors are thus often used in the lamps to maximize light efficiency. Plants or lights are moved as close together as possible so that they receive equal lighting and that all light coming from the lamps wind up on the plants (rather than partly besides it). Often, the distance between lamp and plant is in the range of 24 inches (with incandescent lamps), up to 4 inches (with other lamps as compact, large and high-output fluorescent lamps). Many home gardeners cover the walls of their grow-room with a reflective material, or alternatively, white paint to maximize efficiency.
Light requirements of plants
To determine the appropriate lighting (and the lamp to be best used), the specific needs of the plant need to be determined. To arrange optimum lighting, the lighting present in the plant's natural environment need to be imitated. Of course, the bigger the plant gets the more light it requires; if there is not enough light, a plant will not grow, regardless of other conditions.
For example vegetables grow best in full sunlight and high light levels are needed to grow vegetables well indoors (fluorescent lamps, or MH-lamps are thus preferred). Foliage plants (e.g. Philodendron) grow in full shade and can grow normally with relatively little artificial light (thus for the latter, regular incandescents may already suffice).
In addition, plants also require both dark and light ("photo"-) periods. Therefore, lights may to be timed to turn them on and off at set times. The optimum photo/dark period depends on the species and variety of plant (some prefer long days and short nights and others prefer the opposite, or something in between).
For indoor gardening, one of the most important topics is light density, measured in lux. Light density is the amount of light incident on a surface. One lux equals one lumen (unit) of light falling on an area of one square meter. A brightly lit office would be illuminated at about 400 lux. In Imperial (pounds-feet) terms, a foot-candle, or the intensity of a standard candle on an area of 1 square foot, is about 10.76 lux. In professional farming PAR watt or microeinstein per squaremeter
second is used instead of lux, because lux is optimized for human vision, not for photosynthesis, and can be very misleading in case of non-white lightsources, like the purplish-looking LED growlights.
LED grow lamps
LED panel light source used in an experiment on plant growth by NASA. Pictured plant is a potato plant.Recent advancements in LEDs have allowed for the production of relatively cheap, bright, and long lasting grow lights that emit only the wavelengths of light corresponding to chlorophyll's absorption peaks. These lights are attractive to indoor growers since they do not consume as much power, do not require ballasts, and produce a fraction of the heat of HID lamps. Since there is a significant reduction in heat, time can be extended between watering cycles because the plants transpire less under LED grow lights. A caution is warned to those growing with LEDs not to over water the plants.
There are four chlorophyll absorption peaks and LED grow lights use four different types of LEDs to hit all four peaks (two red and two blue).Early LED grow lamps used hundreds of fractional watt LEDs and were not effective replacements for HID lamps. Newer advanced LED grow lamps use automotive grade 2-3 watt LEDs and have shown similar results to HID lamps.
For the plant photosynthesis, The best lighting wave is 400nm~700nm. Usually, Different color LED is a special wave light, royal blue 440nm~460nm, blue 460~490nm, cyan 490~520nm, green 520~550nm, red 620~645nm, orange 613~620nm, amber 585~597nm. The scientist find that the blue 400~520nm light, Red light 610~720nm, Orange 613~620nm are best rays for plant photosynthesis. LED grow lamp provides the right rays. Spectrum-tailored grow light is plant specific and more efficient than incandescent. The Plant LED grow lamp uses LEDs to generate the specific colors of light that plants use most efficiently for vigorous growth and health. Increase florescence time much more. For example, For the flower in vase indoor, The florescence increased to 20 days is not impossible. In addition, the lamp uses significantly less energy and gives off much less waste heat than broad-spectrum devices based on incandescent, fluorescent, or metallic-vapor technology. Especially for office plant and stove plant. You just need to buy our red LED light bulbs and blue LED light bulbs as mixed color lighting system.
Aeroponic system
Aeroponic system |
A timer controls the nutrient pump much like other types of hydroponic systems, except the aeroponic system needs a short cycle timer that runs the pump for a few seconds every couple of minutes.
N.F.T. system (Nutrient Film Technique)
NFT system |
There is usually no growing medium used other than air, which saves the expense of replacing the growing medium after every crop. Normally the plant is supported in a small plastic basket with the roots dangling into the nutrient solution.
N.F.T. systems are very susceptible to power outages and pump failures. The roots dry out very rapidly when the flow of nutrient solution is interrupted.
Drip systems (recovery / non-recovery)
Drip systems |
The non-recovery system requires less maintenance due to the fact that the excess nutrient solution isn't recycled back into the reservoir, so the nutrient strength and pH of the reservoir will not vary. This means that you can fill the reservoir with pH adjusted nutrient solution and then forget it until you need to mix more. A recovery system can have large shifts in the pH and nutrient strength levels that require periodic checking and adjusting.
EBB & FLOW system - (flood and drain)
EBB & FLOW system |
The Ebb and Flow system works by temporarily flooding the grow tray with nutrient solution and then draining the solution back into the reservoir. This action is normally done with a submerged pump that is connected to a timer.
When the timer turns the pump on nutrient solution is pumped into the grow tray. When the timer shuts the pump off the nutrient solution flows back into the reservoir. The Timer is set to come on several times a day, depending on the size and type of plants, temperature and humidity and the type of growing medium used.
The Ebb & Flow is a versatile system that can be used with a variety of growing mediums. The entire grow tray can be filled with Grow Rocks, gravel or granular Rockwool. Many people like to use individual pots filled with growing medium, this makes it easier to move plants around or even move them in or out of the system. The main disadvantage of this type of system is that with some types of growing medium (Gravel, Growrocks, Perlite), there is a vulnerability to power outages as well as pump and timer failures. The roots can dry out quickly when the watering cycles are interrupted. This problem can be relieved somewhat by using growing media that retains more water (Rockwool, Vermiculite, coconut fiber or a good soiless mix like Pro-mix or Faffard's).
Water culture system
Water culture system |
Water culture is the system of choice for growing leaf lettuce, which are fast growing water loving plants, making them an ideal choice for this type of hydroponic system. Very few plants other than lettuce will do well in this type of system.
This type of hydroponic system is great for the classroom and is popular with teachers. A very inexpensive system can be made out of an old aquarium or other water tight container. We have free plans and instructions for a simply water culture system.
The biggest draw back of this kind of system is that it doesn't work well with large plants or with long-term plants.
Wick system
Wick system |
This system can use a variety of growing medium. Perlite, Vermiculite, Pro-Mix and Coconut Fiber are among the most popular.
The biggest draw back of this system is that plants that are large or use large amounts of water may use up the nutrient solution faster than the wick(s) can supply it.
Aquaponics system
There are two types of bacteria required to convert the ammonia. The first; converts the ammonia into nitrites and the 2nd converting the nitrites into nitrates (nitrogen) which is a source required by plants.
The plants take up the water and nutrients within it. What is not taken up by the plants is returned back to the tank via a bio-filter. This filter removes any unused solids and cleans the water before it returns back into the fish tank.
source: geelonghydroponicgardening.com
"Aquaponics Made Easy" - the video will be watched how to be growing plants and to farmed fish. System what use in video is "EBB & FLOW system"
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