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Topic: Potassium deficiency (plants)

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Iron deficiency (plant disorder)

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Manganese deficiency

Magnesium deficiency

Nitrogen deficiency

Boron deficiency

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	Potassium deficiency (plants) - Wikipedia, the free encyclopedia
		Potassium deficiency, also known as potash deficiency, is a plant disorder that is most common on light, sandy soils, as well as chalky or peaty soils with a low clay content.
		The deficiency most commonly affects fruits and vegetables, notably potatoes, tomatoes, apples, currants, and gooseberries, and typical symptoms are brown scorching and curling of leaf tips, and yellowing of leaf veins.
		Deficient plants may be more prone to frost damage and disease, and their symptoms can often be confused with wind scorch or drought.
	en.wikipedia.org /wiki/Potassium_deficiency_(plants) (229 words)

	Potassium Deficiency Symptoms
		Potassium is a highly mobile element in the plant and is translocated from the older to younger tissue.
		Consequently, potassium deficiency symptoms usually occur first on the lower leaves of the plant and progress toward the top as the severity of the deficiency increases.
		Potassium deficiency symptoms in canola, peanuts, coastal bermudagrass, and grapes.
	www.agcentral.com /imcdemo/07Potassium/07-05.htm (254 words)

	Potassium deficiency symptoms in corn
		Potassium deficiency symptoms in corn appear first on the lower leaves because K is easily moved within the plant from older to younger leaves.
		Potassium deficiency symptoms should not be confused with nitrogen deficiency, which first appears as yellowing on the lower (older) leaves, but is located from the leaf tip down the midrib in a V shape.
		In past years, dry weather-induced K deficiency symptoms have sometimes appeared on leaves in the middle of the plant, with the leaves first turning yellow at the tip and then the entire leaf eventually turning yellow (newly emerged leaves are a normal green).
	www.ipm.iastate.edu /ipm/icm/2000/6-26-2000/kdef.html (440 words)

	Potassium Deficiency a Problem in Crops
		Potassium is important for top growth and root growth, and without sufficient levels plants can become stunted with minimal root growth.
		The deficiency in corn shows in the bottom leaves as a yellowing around the edge that will become necrotic and can kill the leaf and move to the upper leaves of the plant.
		Most of the severe deficiencies will reduce the yields by a third to one-half, but if the corn has grown well with only some mild deficiency symptoms showing at the bottom of the plant, losses are more likely to be about 5 percent, Murdock said.
	www.ca.uky.edu /agc/news/2005/Jul/potassium.htm (565 words)

	POTASSIUM DEFICIENCY SCAM KILLS AND MAIMS MILLIONS
		Potassium is present in all cells and is critical to cardiovascular and nerve function, regulating the transfer of nutrients into cells and facilitating muscle energy.
		By the seventies, all meaningful references to serious mineral deficiencies had been removed from the curriculum, with medical students taught that patients could obtain all the minerals they needed from a diet rich in fruit and vegetables, although their university tutors knew this was a complete lie.
		Deficiencies manifesting as cramps, arthritis, osteoporosis, hypertension, angina and strokes etc, became 'diseases' that could be treated by a truly dazzling array of brightly colored and highly profitable pharmaceutical drugs.
	www.vialls.com /vialls/potassium.html (5402 words)

	Encyclopedia entries starting with POT (Site not responding. Last check: 2007-11-02)
		Potassium carbonate (also known as pearl ash or salts of tartar) is a white salt soluble in water which forms a strongly alkaline solution.
		Potassium cyanide is the salt of potassium and hydrogen cyanide, a colorless compound with smell of almonds, similar in appearance to sugar and highly soluble in water.
		Potassium oxide or potash (formula K2O) is a compound of potassium and oxygen used mainly as a fertilizer.
	encycl.opentopia.com /P/PO/POT (8397 words)

	Fertilizer - Role of Potassium and Deficiency Symptoms
		Potassium is an enzyme activator and helps regulate stomates, which are special gate cells in leaves that open and close, allow air and water vapor to pass into and out of the plant.
		Potassium deficiencies of sugarbeet begin with irregular brown patches between the veins on older leaves.
		Potassium deficiency can be verified by soil and plant analysis, however, in sugarbeet, the sodium levels need to be determined, also.
	www.ag.ndsu.nodak.edu /aginfo/procrop/fer/potdef06.htm (255 words)

	HEAT STRESS
		Potassium is involved in maintaining the water status of the plant and the tugor pressure of it's cells and the opening and closing of the stomata.
		Potassium is required in the accumulation and translocation of carbohydrates.
		Plants deficient in boron exhibit brittle abnormal growth at shoot tips and one of the earliest symptoms is failure of root tips to elongate normally.
	www.marijuana-seeds.net /Thanks/ThankYou.htm (2915 words)

	Corn leaf potassium deficiency symptoms
		Corn and soybean responses to deep-band phosphorus and potassium
		Because K is maintained in the plant in the K+ ion form, it is readily moved from older tissue to the growth regions, hence deficiency symptoms appear on the older leaves.
		Potassium uptake by plants is an active process and thus requires an active root system with roots that can explore soil and intercept plant-available K. Therefore, things that impede uptake can result in a deficient K supply within the growing plant, K relocation, and expression of K leaf symptoms.
	www.ipm.iastate.edu /ipm/icm/2002/7-1-2002/cornleaf.html (626 words)

	[No title]
		Potassium influences plant growth, and nutritional balance of the plant.
		Potassium deficiency can be corrected by applying fertilizers that contain potassium.
		Plants on the edges may exhibit splitting of the epidermis, dieback of terminals, and separations in the pith.
	cipm.ncsu.edu /ent/SSDW/nonparatlas.html (1021 words)

	plantnutrients
		If the nutrients are deficient, or too abundant, then plants will be discolored or deformed.The deficiency symptoms will indicate which nutrient or nutrients are needed.
		Potassium deficiency causes stunted growth with leaves close together.
		Sulfur deficiency causes slow growth with small round leaves that roll upward and are stiff and brittle.
	www.rodsgarden.50megs.com /plantnutrients.htm (1072 words)

	MO Drought Info - Limit-Feeding Concentrate Diets (Site not responding. Last check: 2007-11-02)
		Potassium deficiency symptoms often appear on droughtstressed corn, grain sorghum and soybeans.
		Potassium ion diffusion toward the root surface is stimulated by this gradient.
		Soybean is more likely to exhibit potassium deficiency than corn, because most corn plants are mature enough that potassium uptake is nearly complete.
	agebb.missouri.edu /drought/Kdefcrops.htm (419 words)

	Aqua Botanic-Role of potassium
		Plants deficient in K are thus less able to absorb water and are more subject to stress when water is in short supply.
		Potassium also plays a major role in the transport of water and nutrients throughout the plant in the xylem.
		The "reading" of the genetic code in plant cells to produce proteins and enzymes that regulate all growth processes would be impossible without adequate K. When plants are deficient in K, proteins are not synthesized despite an abundance of available nitrogen (N).
	www.aquabotanic.com /potassium.html (1266 words)

	Potassium deficiency - Wikipedia, the free encyclopedia
		For the medical condition in humans, see hypokalemia.
		For the disease in plants, see potassium deficiency (plants)
		This page was last modified 00:52, 12 October 2004.
	en.wikipedia.org /wiki/Potassium_deficiency (90 words)

	Integrated Pest Crop Management Newsletter - University of Missouri (Site not responding. Last check: 2007-11-02)
		The vast majority of the potassium present in Missouri soils is unavailable for plant growth.
		Soybean seeds contain much more potassium than corn grain, so many soybean plants in Missouri are only now entering the time period of rapid potassium uptake.
		Deficiency symptoms first appear as pale to lemon-yellow margins on older leaves.
	ipm.missouri.edu /ipcm/archives/v13n20/ipmltr2.htm (412 words)

	114 Photos of Mineral Deficiencies in Plants (~ 1 meg) for Visual Diagnosis
		Mangold Plant (in situ) — Cluster of crown leaves and rotting of root.
		Mangold Plant — Rotting of crown and rough condition of petiole epidermis.
		Marginal scorching may be confused with leaf scorch due to potassium deficiency.
	www.luminet.net /~wenonah/min-def/list.htm (1820 words)

	Potassium Deficiency Symptoms Showing up in Corn Fields (Site not responding. Last check: 2007-11-02)
		Stunted plants had these symptoms on all leaves, while healthier plants had normal looking leaves near the top of the plant progressing to yellow fired bottom leaves, although leaf yellowing was often seen beginning near the tip of the top leaves.
		Below-ground plant symptoms included poor root growth with many plants exhibiting root "fanning: where roots were orientated with the seed opener furrow.
		The plants in these fields are exhibiting classic potassium deficiency symptoms.
	corn.agronomy.wisc.edu /WCM/1995/W017.htm (284 words)

	Potassium Deficiency in Corn (Site not responding. Last check: 2007-11-02)
		The symptoms described are characteristic of potassium (K) deficiency: yellowing begins at the leaf tip and proceeds along the leaf margin of the older leaves, with some chlorosis of the in-terior of the leaves, and newer leaves remain green.
		The fact that the newer leaves are green does not necessarily mean that the plant is growing out of the problem but rather that the plant is translocating the potassium from the older leaves to the newer ones.
		Potassium uptake may be inhibited by low soil oxygen levels, a problem that can be caused by compaction and/or excessively wet soils.
	www.ag.uiuc.edu /cespubs/pest/articles/200314g.html (735 words)

	Naturopathic Physician on Her Career Choice (Feb/Mar 2005)
		Scurvy is a disease caused by a deficiency of vitamin C. It results in symptoms such as bleeding gums, bruising, and poor wound healing.
		Magnesium deficiency is the most common dietary deficiency in the U.S. Magnesium levels in the diets of 10 different, non-industrialized groups, still eating their traditional diets, were 130–2,850% higher than are consumed in the modern diet.
		Potassium (broth) can be considered for use in the following potassium deficiency signs, symptoms and conditions: cramping, shallow breathing, fatigue, nausea, vomiting, confusion, increased urination, and heart attack.
	www.townsendletter.com /FebMarch2005/broth0205.htm (6537 words)

	More potassium deficiency and leaf striping in corn (Site not responding. Last check: 2007-11-02)
		Most soybean plants are at the V4 to R1 growth stage and in some areas growth has been slow because of cool temperatures, weed competition, and herbicide damage.
		More potassium deficiency symptoms in corn were reported statewide.
		Causes of potassium deficiency may include dry soils, compaction, planting depth, poor aeration, and poor nodal root development.
	www.ent.iastate.edu /Ipm/Icm/2000/6-26-2000/fn06-26-2000.html (320 words)

	EFFECTS OF POTASSIUM DEFICIENCY ON SOME ORGANIC CONSTITUENTS IN PLANTS
		The effects are described of nitrogen and potassium fertilizers on growth and the contents of soluble carbohydrates, free amino acids and amins in Italian ryegrass grown in K-deficient soil in the greenhouse.
		All combinations were tested of 40,80 and 160 ppm of N (applied as ammonium nitrate and 0, 60, 120, and 240 ppm of K (applied as potassium chloride) in air-dry soil.
		As glutamine and asparagine were predominant compounds most affected by potassium, estimating these two amides indicates the state of nitrogen metabolis in the plants.
	www.actahort.org /books/29/29_21.htm (220 words)

	Potassium deficiency
		The plants are suffering from potassium deficiency as well as other possible deficiencies including nitrogen and phosphorous.
		New growth on the plant will not be affected by the deficiencies, but the damage to the old growth will remain.
		One way to get needed nutrients to the deficient tissue quickly is to make a foliar spray using a liquid kelp extract containing a high percentage (3%) of potassium.
	www.cannabisculture.com /articles/2140.html (332 words)

	Organic Eprints - 632: The effect of potassium deficiency on growth and N2-fixation in Trifolium repens (Site not responding. Last check: 2007-11-02)
		Høgh-Jensen, Dr. Henning (2003) The effect of potassium deficiency on growth and N2-fixation in Trifolium repens.
		Abrupt K removals stimulated without delay nodule growth strongly but as K concentrations decreased in the plant tissue, a significant decline in nitrogenase activity per unit root weight as well as per unit nodule mass occurred.
		Further, the rate of photosynthesis per unit leaf area was unaffected, while the CO2 acquisition for the plant as a whole increased due to an expansion of total leaf area whereas the leaf area per unit leaf weight was unaffected.
	orgprints.org /632 (305 words)

	Color Photos of Mineral Deficiencies in Tomato Plants
		Blotchy uneven ripening, similar to "Blotchy Ripening" due to potassium deficiency but blotchy areas more sharply defined.
		Stems stiff; terminal buds die and growths die back; lateral shoots developed, giving plant flat top; leaves highly tinted purple, brown and yellow.
		Cucumber plants top, and tomato plants bottom, were grown for 20 days under controlled environmental conditions.
	www.luminet.net /~wenonah/min-def/tomatoes.htm (389 words)

	The World's Healthiest Foods: Feeling Great
		A very good source of high quality protein, halibut are rich in significant amounts of a variety of important nutrients including the minerals selenium, magnesium, phosphorous and potassium; the B vitamins B12, niacin, and B6; and perhaps most important, the beneficial omega-3 essential fatty acids.
		Studies show that a deficiency of magnesium is not only associated with heart attack but that immediately following a heart attack, lack of sufficient magnesium promotes free radical injury to the heart.
		Magnesium deficiency in patients with recent myocardial infarction and provoked coronary artery spasm.
	www.worldshealthiestfoods.com /genpage.php?tname=foodspice&dbid=95 (3007 words)

	The Gardener's Forum
		Discussions about the pests and problems as the cultural requirements for growing your favorite indoor flowering and foliage plants.
		A place to post your questions about the specific cultural and care requirements of landscape plants, trees and flowers.
		Please help these members identify their mystery plants....
	thegardenhelper.com /cgi-bin/ubb/cgi/ultimatebb.cgi?... (553 words)

	Wikipedia:Requested pictures - Wikipedia, the free encyclopedia
		Potassium deficiency (plants) - a photo/diagram would be welcome.
		Fire ant - a photo such as this, showing the huge number of mounds found in fields in Texas (and probably other areas).
		Genipa, a plant genus from Central and South America, with an edible fruit (Genipa americana).
	en.wikipedia.org /wiki/Wikipedia:Requested_pictures (5595 words)

	Symptoms of dry soil-induced potassium deficiency (Site not responding. Last check: 2007-11-02)
		Extension field specialists have reported that potassium (K) deficiency symptoms are beginning to be observed on corn in east central Iowa.
		K deficiency symptoms develop because plants cannot extract K from the dry surface soil.
		If we get into a more normal rainfall pattern the plants will recover with little or no loss of yield.
	www.ent.iastate.edu /Ipm/Icm/1997/6-30-1997/drysoilK.html (169 words)

	This is potassium deficiency right? - The Planted Tank Forum (Site not responding. Last check: 2007-11-02)
		The Planted Tank Forum > General Planted Tank Forums > General Planted Tank Discussion
		I believe it to be a potassium deficiency.
		Is the hygro less tolerant of such a deficiency?
	plantedtank.net /forums/.../1660-potassium-deficiency-right.html (61 words)

	Nutrient Deficiency
		I have observed what may be a potassium deficiency in my sword plants and I was wondering if someone could help me out with a verdict.
		The rest of the plants in the tank, some Crypts, stem plants like hygrophila, liliopsis, 4-leaf clover, java fern, wysteria, and dwarf sag all seem fine.
		I originally thought that the problems with the ruffled sword was due to the water level dropping below the leaves because only the tips were damaged.
	fins.actwin.com /aquatic-plants/month.9906/msg00422.html (387 words)

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