Discover great deals on the many hard to find and one of a kind items available only on eBay!

Moisture & pH Meters

Soil pH is the pH of soil water. It is based on the measurement of pH, which depends on the activity of hydrogen ions (H+) in a solution. There are many different methods to collect soil water, all which influence the measured soil pH in one way or another (see below). more...

HomeHome
Bird & Wildlife AccessoriesBird & Wildlife Accessories
Garden DécorGarden Décor
Garden Structures & FencingGarden Structures & Fencing
Gardening & PlantsGardening & Plants
Children's Gardening ItemsChildren's Gardening Items
Fertilizer & Soil AmendmentsFertilizer & Soil Amendments
Garden Tools & EquipmentGarden Tools & Equipment
AeratorsAerators
Bonsai ToolsBonsai Tools
Bonsai TreeBonsai Tree
CompostingComposting
Gift Sets & KitsGift Sets & Kits
Gloves & Protective GearGloves & Protective Gear
Gloves GardenGloves Garden
Knee Pads, Seats & CushionsKnee Pads, Seats & Cushions
Loppers, Pruners & SnipsLoppers, Pruners & Snips
Moisture & pH MetersMoisture & pH Meters
OtherOther
Rakes, Shovels & HoesRakes, Shovels & Hoes
Seeders, Sprayers &...Seeders, Sprayers &...
Tool Carriers, Aprons &...Tool Carriers, Aprons &...
Wheelbarrows, Carts & WagonsWheelbarrows, Carts & Wagons
Hydroponics & Seed StartingHydroponics & Seed Starting
OtherOther
Pest & Weed ControlPest & Weed Control
Planters, Pots & Window...Planters, Pots & Window...
Plants, Seeds & BulbsPlants, Seeds & Bulbs
Publications & SoftwarePublications & Software
Watering EquipmentWatering Equipment

The soil pH is closely linked to the concepts alkalinity and acidity (see acid neutralizing capacity). A neutral solution has pH 7 while an acid solution has pH less than 7 (more H+ than OH-) and a basic solution pH larger than 7 (more OH- than H+) but there is, contrary to popular belief, no exact limit to the pH range. In natural soils and surface waters buffer systems make pH levels below 3 uncommon, but not impossible. The exposure of the soil to sunlight does not usually affect the pH of the soil.

(NOTE: While a basic solution always has a pH larger than 7, an alkaline solution (i.e. a solution with positive acid neutralizing capacity) does not necessarily have a pH larger than 7. For details on the relation between pH and ANC, see acid neutralizing capacity)

Soil pH is an important consideration for farmers and gardeners for several reasons, including the fact that many plants and soil life forms prefer either alkaline or acidic conditions, that some diseases tend to thrive when the soil is alkaline or acidic, and that the pH can affect the availability of nutrients in the soil.

Nutrient availability in relation to soil pH

The majority of food crops prefer a neutral or slightly acidic soil. Some plants however prefer more acidic (e.g., potatoes, strawberries) or alkaline (brassicas) conditions.

The above table gives a guide to the availability of several nutrients at various pH values

During the acidification process the decrease in pH results in a release of positively charged ions (cations) from the cation exchange surfaces (organic matter and clay minerals). In the short term acidification thus increases the concentration of potassium (K), magnesium (Mg and calcium (Ca) in soil solution. Once the cation exchange surface has become depleted of these ions, however, the concentration in soil solution can be quite low and is largely determined by the weathering rate. The weathering rate in turn is dependent on such things as mineralogy (e.g. presence of easily weathered minerals), surface area (i.e. the soil texture), soil moisture (i.e. how large a fraction of the mineral surface area that is wet), pH, concentration of base cations such as Ca, Mg and K as well as concentration of aluminium. The amount of plant available nutrients is a much more difficult issue than soil solution concentrations. The term plant available nutrients usually include pools other than soil solution but which are supposed to replenish soil solution pretty fast e.g. through cation exchange. One reason for including such pools is the plants capability of releasing organic acids which increase the total soil solution concentration of some cation nutrients that are important for the plant.

Read more at Wikipedia.org


[List your site here Free!]

Luster Leaf 1609Cs Rapitest® Soil TesterLuster Leaf 1609Cs Rapitest® Soil Tester $6.50 Soil Tester,3-in-1 Soil Moisture,ph Meter Test Kit with Light Gauge Function,SoiSoil Tester,3-in-1 Soil Moisture,ph Meter Test Kit with Light Gauge Function,Soi $12.35
Xiaomi Tds Tester Water Quality Purity Portable Detection Pen Filter OriginalXiaomi Tds Tester Water Quality Purity Portable Detection Pen Filter Original $6.30 Hot 4 In 1 Plant Soil Ph Moisture Light Soil Meter Thermometer Tester SurveyHot 4 In 1 Plant Soil Ph Moisture Light Soil Meter Thermometer Tester Survey $16.71 Was: Previous Price $17.97
General Tools Dm8252Rs High Resolution Digital Manometer with 4 Rubber StoppersGeneral Tools Dm8252Rs High Resolution Digital Manometer with 4 Rubber Stoppers $184.99 List price: Previous Price $249.00 Oakton pH 20 Series pH/mV/Degrees C Meter And Probe Digital pH MeterOakton pH 20 Series pH/mV/Degrees C Meter And Probe Digital pH Meter $55.94 Was: Previous Price $69.92
Covery Cultivators & Tillers In Soil Moisture Meter, Light And Ph Acidity PlantCovery Cultivators & Tillers In Soil Moisture Meter, Light And Ph Acidity Plant $14.42 Lcd Digital Ph Meter Hydroponics Aquarium Pool Water Monitor Measure TesterLcd Digital Ph Meter Hydroponics Aquarium Pool Water Monitor Measure Tester $8.62
Sensor Mini Digital Hygrometer Lcd Indoor Thermometer Temperature HumiditySensor Mini Digital Hygrometer Lcd Indoor Thermometer Temperature Humidity $1.84 3 In1 Digital Humidity Sunlight Ph Soil Garden Tester Humidity Test Acidity Use3 In1 Digital Humidity Sunlight Ph Soil Garden Tester Humidity Test Acidity Use $10.92
pH High Accuracy Meter Tester Water Drinking Aquiriums Swimming Pool Reader NewpH High Accuracy Meter Tester Water Drinking Aquiriums Swimming Pool Reader New $16.98 Portable Digital Tds 3 Meter Water Quality Purity Tester 0-9990 ppmPortable Digital Tds 3 Meter Water Quality Purity Tester 0-9990 ppm $8.40
Digital Ph and Tds Meter Set by SunGrow Highly accurate readings Lightweight &Digital Ph and Tds Meter Set by SunGrow Highly accurate readings Lightweight & $22.69 Ocie-Tlll1601-Luster Leaf 1601 Rapitest Soil Test KitOcie-Tlll1601-Luster Leaf 1601 Rapitest Soil Test Kit $26.39
Digital Tds3 Water Tester Purifier Pen Temp Ppm Stick Water Purity ToolDigital Tds3 Water Tester Purifier Pen Temp Ppm Stick Water Purity Tool $1.89 Ph Soil Meter, 3-in-1 Soil Tester Kit Moisture Soil Meter with Light, Ph & AcidiPh Soil Meter, 3-in-1 Soil Tester Kit Moisture Soil Meter with Light, Ph & Acidi $14.19
Hm Digital Tds-Ez Water Quality Tds Tester, 0-9990 ppm Measurement Range , 1 ppmHm Digital Tds-Ez Water Quality Tds Tester, 0-9990 ppm Measurement Range , 1 ppm $21.21 Digital Lcd Ph Meter Tester Pool Aquarium Hydroponic Water Monitor LaboratoryDigital Lcd Ph Meter Tester Pool Aquarium Hydroponic Water Monitor Laboratory $18.99
2X4in1 Digital Temperature Moisture Humidit Ph Soil Meter Sunlight Garden Tester2X4in1 Digital Temperature Moisture Humidit Ph Soil Meter Sunlight Garden Tester $37.49 Waterproof pH Temp Meter Commercial Residential Lr44 Batteries Acidity DigitalWaterproof pH Temp Meter Commercial Residential Lr44 Batteries Acidity Digital $75.21
New Digital Lcd Ph Soil Temperature Moisture Meter Sunlight Tester Garden PlantNew Digital Lcd Ph Soil Temperature Moisture Meter Sunlight Tester Garden Plant $22.21 Hanna Instruments Hi96716-11 Cal Check Standard Cuvettes, BromineHanna Instruments Hi96716-11 Cal Check Standard Cuvettes, Bromine $86.24 Was: Previous Price $114.99
Dr.meter S30 3-in-1 Soil Moisture Meter Indoor Outdoor Sunlight Ph Acidity SaleDr.meter S30 3-in-1 Soil Moisture Meter Indoor Outdoor Sunlight Ph Acidity Sale $17.36 3in1 Soil Tester Moisture pH Light Meter Plant Tester for Indoor Outdoor Plants3in1 Soil Tester Moisture pH Light Meter Plant Tester for Indoor Outdoor Plants $10.68 Was: Previous Price $14.24
4 in 1 Digital Lcd Water Quality Tester Monitor pH Rh Ec(Tds) Temp Meter Y0N84 in 1 Digital Lcd Water Quality Tester Monitor pH Rh Ec(Tds) Temp Meter Y0N8 $62.16 to $62.83 ph monitor, digital ph monitor with replaceable bnc ph probe & adapter ph990ph monitor, digital ph monitor with replaceable bnc ph probe & adapter ph990 $41.56
Digital Aquarium Ph Tester Pool Fish Water Test Meter quality pH monitoring penDigital Aquarium Ph Tester Pool Fish Water Test Meter quality pH monitoring pen $12.60 Portable Ph Meter Tester Accurate Digital Lcd Ph Value Test Pen Ph TesterPortable Ph Meter Tester Accurate Digital Lcd Ph Value Test Pen Ph Tester $10.16
1665 professional soil test kit with 200 tests1665 professional soil test kit with 200 tests $123.80 Luster Leaf 1845 Rapitest Digital Soil Plant Garden Ph Sensor Meter Tester TestLuster Leaf 1845 Rapitest Digital Soil Plant Garden Ph Sensor Meter Tester Test $8.99
Bluelab Probe Care Kit - pH and ConductivityBluelab Probe Care Kit - pH and Conductivity $28.80 Irrometer Watermark Soil Moisture Sensor Water Indoor Outdoor 5 Foot Wire LengthIrrometer Watermark Soil Moisture Sensor Water Indoor Outdoor 5 Foot Wire Length $25.60
Luster Leaf 1601 Rapitest Soil Test KitLuster Leaf 1601 Rapitest Soil Test Kit $20.97 Milwaukee Instruments Ph600Aq Ph Tester With 1 Point Manual CalibrationMilwaukee Instruments Ph600Aq Ph Tester With 1 Point Manual Calibration $27.80
Digital Ph Meter Tester Pool Water Aquarium Lcd Portable Pen Temperature TestDigital Ph Meter Tester Pool Water Aquarium Lcd Portable Pen Temperature Test $14.09 Soil Tester Moisture Meter Covery 3 in 1 Light and Ph acidity Tester Plant.Soil Tester Moisture Meter Covery 3 in 1 Light and Ph acidity Tester Plant. $22.18
Xlux T12 2 in 1 Soil pH and Moisture Sensor Meter Tester for Outdoor & Indoor.Xlux T12 2 in 1 Soil pH and Moisture Sensor Meter Tester for Outdoor & Indoor. $10.77 1Pc White Pen Design Tds & Ec Digital Tester Water Acid Tester Measurement Tool1Pc White Pen Design Tds & Ec Digital Tester Water Acid Tester Measurement Tool $6.64 Was: Previous Price $6.99
Lab Safety Supply 49G960 pH Electrode, 0 to 14 pH Range Brand New In BoxLab Safety Supply 49G960 pH Electrode, 0 to 14 pH Range Brand New In Box $24.99 3 in 1 Garden Soil Moisture Tester Light Test Ph Meter for Plant Flower Trees3 in 1 Garden Soil Moisture Tester Light Test Ph Meter for Plant Flower Trees $4.70 Was: Previous Price $4.95
Mastech Ms6900 Mini Digital Moisture Meter Wood Concrete Humidity Tester M2X2Mastech Ms6900 Mini Digital Moisture Meter Wood Concrete Humidity Tester M2X2 $33.38 Luster Leaf 01615 Garden Soil Check Kit #1615Cs Free ShippingLuster Leaf 01615 Garden Soil Check Kit #1615Cs Free Shipping $5.99
Luster Leaf 825 4" Rapiclip® Plant Labels With Pencil,Pk12Luster Leaf 825 4" Rapiclip® Plant Labels With Pencil,Pk12 $38.06 List price: Previous Price $49.10 New Extech Ph110 Exstik Ph Waterproof/Refillable Us Authorized DealerNew Extech Ph110 Exstik Ph Waterproof/Refillable Us Authorized Dealer $101.63
Jtd Digital Handheld Tds Meter, Water Quantity Testing Monitor, 0-9990 ppm, 1Jtd Digital Handheld Tds Meter, Water Quantity Testing Monitor, 0-9990 ppm, 1 $17.83 to $22.59 Professional Quality Tds, Ec & Temperature Meter, Water Quality Test And WaterProfessional Quality Tds, Ec & Temperature Meter, Water Quality Test And Water $24.99
2 in 1 Soil Ph Meter&Fertility Tester With 3 Probes Ldeal Instrument2 in 1 Soil Ph Meter&Fertility Tester With 3 Probes Ldeal Instrument $11.38 Water Quality Digital Tds Meter Tester, Atc/Measuring Temperature/Data FunctionWater Quality Digital Tds Meter Tester, Atc/Measuring Temperature/Data Function $14.98
Click to see more Moisture & pH Meters items at www.ebay.com
Prices current as of last update, 10/21/17 7:28am.

Home Contact Resources Exchange Links eBay