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Topic: Soil pH

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	Soil pH and Buffer pH
		Soil pH is the foundation of essentially all soil chemistry and nutrient reaction and should be the first consideration when evaluating a soil test.
		If the soil pH changes only a little after the buffering solution has reacted, it means that the soil pH is difficult to change and a larger lime addition is needed to reach the desired pH for the crop.
		The reasons that a soil may require differing amounts of lime to change the soil pH relates to the soil CEC and the "reserve" acidity that is contained by the soil.
	www.spectrumanalytic.com /support/library/ff/soil_buffer_ph.htm (906 words)

	Soil pH - Wikipedia, the free encyclopedia
		Soil pH is an indication of the alkalinity or acidity of soil.
		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.
		Soil acidity is reduced by volatilization and denitrification of nitrogen.
	en.wikipedia.org /wiki/Soil_pH (1883 words)

	Ammonia fertilizer and soil pH
		The pH of a soil is its measure of relative acidity or alkalinity.
		Current results suggest that soil pH has important effects on recovery of fall-applied N in the spring when conditions are favorable for leaching and denitrification, but soil pH does not have important effects when conditions are unfavorable for N loss by these mechanisms.
		Soil pH, therefore, deserves attention as an important factor determining the amount of risk associated with applying N in the fall.
	www.extension.iastate.edu /nwcrops/fertilizer_and_soil_ph.htm (672 words)

	Soil pH: What it Means
		Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units.
		Soil pH is defined as the negative logarithm of the hydrogen ion concentration.
		To determine the average soil pH of a field or lawn it is necessary to collect soil from several locations and combine into one sample.
	www.plantstress.com /Articles/toxicity_i/soilph.htm (808 words)

	AZ Master Gardener Manual: Soil pH
		That is, a soil with a pH of 8.5 is ten times more alkaline than a soil with a ph of 7.5 and a soil with a pH of 6.5 is a hundred times more acid than a soil with a pH of 8.5.
		The concentration of soluble salts in the soil profile is increased as water is removed from the soil via evaporation and transpiration.
		The salt balance in the soil as affected by the quantity and quality of the irrigation water and the effectiveness of drainage and leaching are the key to managing saline or alkaline soils with irrigation practices.
	ag.arizona.edu /pubs/garden/mg/soils/ph.html (1520 words)

	Soil pH
		Soils of good texture must be made and unfortunately the best amendments, such as compost, aged manures and redwood forest mulch, must be purchased.
		Soil pH can be tested using several of our pH meters located in the measurement section of our catalog.
		Soils west of the Mississippi tend to be alkaline and require annual additions of soil sulfur to lower the pH.
	www.frostproof.com /soilph.html (1558 words)

	Soil pH (Site not responding. Last check: 2007-11-06)
		Soil pH is a measurement of the acidity or alkalinity of a soil.
		Soil pH is an important chemical property because it affects the availability of nutrients to plants and the activity of soil microorganisms.
		Iron chlorosis is common in Colorado due to the soil pH.
	www.ext.colostate.edu /pubs/garden/07727.html (1025 words)

	Soil pH and Landscape Plants
		The capital letter "H" is the chemical symbol for hydrogen and pH is a figure describing the concentration of hydrogen in the soil, which in turn determines the acidity of the soil.
		Soil pH is very important because it influences several soil properties that directly affect growth of plants.
		If the soil is too alkaline because of liming or a minimum of natural alkalinity, several acid-forming materials can be used to reduce the soil pH.
	hort.ifas.ufl.edu /gt/soilph/soilph.htm (748 words)

	Soil pH, Fertilizers, and Lime
		Some soils have a great ability to cope with these added H+ particles, as they have large amounts of natural "lime" to convert the h+ into water, or maybe they have lots of organic matter and clay to bind the H+, taking it (temporarily) out of the soil water solution.
		Soil with a pH of 4 has 100 times the "acidity" of a soil with a pH of 6.
		The pH is often higher in the second and third foot than in the surface foot in the zone beneath trees, unless you have been treating the soil acidity with lime over the past several years.
	www.ncw.wsu.edu /treefruit/soil/lime.htm (1280 words)

	North Dakota Survey of Soil Copper, pH, Zinc, and Boron Levels
		Soil pH levels on upland positions were relatively high (>7.0) in the eastern half of the state, the northwest and the southwest.
		Soil pH in depressional areas was lowest in the western half of the state in areas similar to the extent of the Missouri Couteau region.
		Soil zinc levels in depressions were relatively high in parts of the Red River Valley, the Souris basin, the dry bean growing areas and an area in Adams and Hettinger counties.
	www.ag.ndsu.edu /pubs/plantsci/soilfert/er52w.htm (1653 words)

	Managing soil pH in turf
		A soil pH that is too high or too low can result in inefficient use of fertilizer by turf, excess thatch build-up and increased pest problems.
		For example, a soil with a pH of 5.5 is 10 times more acidic than a soil with a pH of 6.5, and a soil with pH of 4.5 is 100 times more acidic than the soil with a pH of 6.5.
		Soil pH affects turf health in several ways: * Strongly acidic soils (below pH of 5.5) may result in calcium, magnesium and phosphorus deficiencies in some turfgrass species and increase the availability of aluminum and manganese to levels that may be toxic.
	grounds-mag.com /mag/grounds_maintenance_managing_soil_ph_2/index.html (3119 words)

	Soil and Plant Laboratory, Inc. - SPL Articles Archive
		Soil testing is a first step in evaluating soils to be slated for landscape use.
		pH is a numerical measure of the acidity or alkalinity of the soil.
		Knowledge of soil salinity, compost salinity, and plant tolerance to salinity is necessary for the successful establishment of plant material.
	www.soilandplantlaboratory.com /articles2.html (2352 words)

	Soil Chemistry (Site not responding. Last check: 2007-11-06)
		Soil chemistry studies the chemical characteristics of soil which depends on their mineral composition, organic matter and environment.
		While the pH of soils may have some direct effects on plants themselves, it is the interaction of soil pH and plant nutrients that is important.
		Soils which are higher in acidity or alkalinity levels can result in deficiencies or excesses (that may be toxic) of certain kinds of elements.
	interactive.usask.ca /ski/agriculture/soils/soilchem/index.html (1135 words)

	SULIS Implementation - Modifying Soil pH
		Soil pH is a measure of soil acidity.
		Acidic soils are found in Northern Minnesota and in coastal areas that have high evergreen tree populations (dead evergreen needles are acidic).
		Basic soils are generally found in areas with lower rainfall levels, in urban areas (due to large amount of cement), and in areas where there is a high concentration of clay in the soil (Midwest, Southwest).
	www.sustland.umn.edu /implement/soil_ph.html (1240 words)

	Soil pH and Soil Acidity or Alkalinity
		Soil pH is referred to as the "acidity" of the soil and is measured by the number of Hydrogen ions present in the soil solution.
		When the soil pH is too "acid" (low pH) or "alkaline" (high pH), nutrients present in the soil become locked-up or unavailable.
		The soils we've tested in the South Hills of Pittsburgh, and Washington County, over the past 20 years, tend to need both lime and phosphorus.
	www.donnan.com /soilph.htm (218 words)

	Soil pH
		pH is a measure of how acidic or basic things are and is measured using a pH scale between 0 to 14, with acidic things having a pH between 0-7 and basic things having a pH from 7 to 14.
		The pH of soil or more precisely the pH of the soil solution is very important because soil solution carries in it nutrients such as Nitrogen (N), Potassium (K), and Phosphorus (P) that plants need in specific amounts to grow, thrive, and fight off diseases.
		Many other crops, vegetables, flowers and shrubs, trees, weeds and fruit are pH dependent and rely on the soil solution to obtain nutrients.
	soil.gsfc.nasa.gov /soil_pH/plant_pH.htm (446 words)

	Soil (Site not responding. Last check: 2007-11-06)
		Adequate mixing of the slurry of Calgon and soil particles is critical to separating all of the clusters.
		Horse manure is considered the premier soil texture improver in the arsenal of the organic farmer.
		pH is the proportion of Hydrogen ions in the water.
	koning.ecsu.ctstateu.edu /Plants_Human/soil.html (6538 words)

	Soil pH
		Soil acidity in the Western Australian wheatbelt is considered to be one of the largest yield limiting factors faced by farmers.
		Soil pH is most commonly measured in a Calcium chloride solution, but can be measured in water.
		This is calculated on the rotation, soil type and fertiliser regime employed to give an estimate on the lime required to neutralise the nett acidity increase.
	www.summitfertz.com.au /soil_ph.htm (952 words)

	Changing the pH of your Soil
		The pH value of soil is one of a number of environmental conditions that affects the quality of plant growth.
		The pH value of a soil is influenced by the kinds of parent materials from which the soil was formed.
		The texture of the soil, organic matter content and the plants to be grown are all factors to consider in adjusting the pH value.
	hgic.clemson.edu /factsheets/HGIC1650.htm (1337 words)

	Soil Testing
		Soil fertility fluctuates throughout the growing season each year--the quantity and availability of mineral nutrients are altered by the addition of fertilizers, manure, compost, mulch and lime or sulfur, in addition to leaching.
		Furthermore, a large quantity of mineral nutrients are removed from soils as a result of plant growth and development, and the harvesting of crops.
		Soils that look different or have been used differently should be sampled and tested separately.
	www.uri.edu /ce/factsheets/sheets/soiltest.html (636 words)

	Soil pH
		increase when a soil sample would be taken closer to a pond than further away from it.
		soil that was taken further away from the pond, about thirty meters.
		alkalinity of a soil, numerically equal for neutral soils, increasing with increasing alkalinity
	depts.alverno.edu /nsmt/archive/BaranMeck.htm (1087 words)

	Soil pH
		Beech, mock orange, asparagus and sagebrush tolerate soils with a pH 7.0 to 8.0.
		Above 8.5 the soil is too alkaline for most plants and soil with a pH less than 3.5 is too acid.
		Soil pH can be raised, making the soil less acidic and more alkaline, by adding lime to the soil.
	www.adbio.com /science/soil/ph.htm (235 words)

	Rittenhouse \| Soil pH Meters / Moisture Tester
		The pH scale ranging from 0 to 14 is used to indicate acidity and alkalinity.
		Soil pH is important chiefly because of the many effects it has on the biological and chemical activity of the soil, which affects the metabolism of your plants.
		The Soil ph meter is not to be used in straight sand.
	www.rittenhouse.ca /asp/product.asp?PG=686 (554 words)

	Soil pH sensor Commercialized
		Until the introduction of this sensor, soil sampling meant that someone had to poke holes in the ground and send samples off to a lab to be analyzed.
		Economics, and his student Alan Hallman estimated the potential value of the sensor data and found that the higher data density was key to the economic value of the technology.
		Soil pH mapping is an additional service that ag retailers can provide their clients, in addition to or instead of manual soil sampling.
	www.agriculture.purdue.edu /ssmc/Frames/Dec2003_Purdue_NL1.htm (989 words)

	SOIL TESTING (Site not responding. Last check: 2007-11-06)
		A soil pH indicates whether the soil is acidic, alkaline, or neutral.
		If a soil pH is less than 6.0 (acidic), then a lime index is calculated to help make a more accurate lime recommendation.
		Unfortunately, the success of adding sulfur to lawns to reduce a soil pH has been limited and is not practical or economically feasible.
	www.agry.purdue.edu /turf/pubs/ay18.htm (845 words)

	Soil pH Meter
		Special pH Electrode incorporates a temperature sensor and has a tiny amplifier for quick response in soils.
		Even slightly moist soils can be directly tested with the rugged 4-in-1 conic shaped electrode.
		For higher degrees of accuracy or in stony ground, use the specially made HI 7051 test solution to dilute a small sample of the test soil.
	www.geotechnical.net /hanna_soil_ph.shtml (182 words)

	Rapitest Soil pH Meter
		The Rapitest Soil pH Meter is designed for simplicity of use with accurate results.
		All plants have a pH preference, so it is important to know the pH level of your soil.
		You can then choose plants with the same pH preferences, avoid those that will not do well in your soil, or know how to go about supplying their special growing needs.
	www.treehelp.com /shopping/product-detail.asp?Product_ID=2423 (263 words)

	SOIL pH (Site not responding. Last check: 2007-11-06)
		The availability of nutrients in the soil for plant use.
		A soil test is essential to determine soil
		Generally, a soil pH of 6.8 is a target pH for the crops shown to the left.
	www.cjnetworks.com /~sccdistrict/soilph.htm (102 words)

	Cole-Parmer: soil pH meters
		Our soil pH meters allow you to easily test and monitor the pH levels for healthy and productive plants.
		Take a look at our soil pH kits if you need to test additional parameters such as salinity and conuctivity.
		Large, dual-LCD lets you view pH (or mV) and temperature values simultaneously, and troubleshooting data with its decipherable icons.
	www.coleparmer.com /opproducts/soil_ph_meters.html (211 words)

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