Nutrient Interrelations in Lime-Induced Chlorosis

Lindner, Robert; Harley, C. P.

doi:10.1104/pp.19.3.420

Cited by 46 publications

(14 citation statements)

References 17 publications

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“…Yust (1982) has previously reported that tissue Fe content did not correlate with color ratings. The lack ofa significant correlation between plant color and Fe content has been reported (Bennett, 1945;Linder and Harley, 1944).…”

Section: Resultsmentioning

confidence: 99%

Foliar Application of N and Fe to Kentucky Bluegrass¹

Yust¹,

Wehner²,

Fermanian

1984

Agronomy Journal

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The goal of the professional lawn care industry is to provide the homeowner with a dark green weed-free lawn. Members of this industry are interested in techniques to enhance the color of a turfgrass stand in lieu of excessive N fertilization. The purpose ohbis research was to evaluate tbe use of foliar applications of Fe alone or in com· bination with N on the color response of Kentucky bluegrass (Poa pratensis L.). Iron sulfate or an iron chelate was applied at the rate of 1.1, 2.2, or 4.5 kg Fe ha-I in combination with either 0, 25, or 49 kg N ha-1 to a mixed 'Columbia'I'Touchdown' Kentucky bluegrass turf growing on a Catlin silt loam (fine-silty, mixed, mesic Typic Argiudoll). Color ratings and clipping weights were determined on a weekly basis until treatment effects were no longer significant. In a separate experiment, both sources of Fe were applied at rates of 1.1 to 72.4 kg Fe ha-I to Kentucky bluegrass to evaluate phytotoxicity. The color enhancement due to Fe applications without N lasted from several weeks to several months depending on the weather following application. Use of Fe during cool wet periods enhanced turf color for only 2 to 3 weeks and therefore, was considered of limited value. Iron applications during cool dry periods enhanced turf color for several months. The treatment of 2.2 kg ha-I of Fe from iron chelate was judged to be the most effective Fe treatment because the color enhancement was usually equal to that provided by a 4.5 kg rate of either source but it did not result in any discoloration as was found with the 4.5 kg rate. Combining Fe with tbe 25 kg ha-I rate of N resulted in color enhancement equal to that caused by applying 49 kg ba-I of N alone. The results of the study indicate that combining Fe with N can result in acceptable turfgrass color with lower rates of N. No permanent damage was caused to turfs receiving Fe at rates up to 72.2 kg ha-I although foliar phytotoxicity was observed.

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Section: Resultsmentioning

confidence: 99%

Foliar Application of N and Fe to Kentucky Bluegrass¹

Yust¹,

Wehner²,

Fermanian

1984

Agronomy Journal

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“…Olsen (8) 30, 1954. in which the iron and phosphorus contents of green and chlorotic leaves were given (6,13,14,16,17), it appeared that the same trend in the phosphorus-iron ratio occurred irrespective of the cause of chlorosis. Similarly, symptoms of phosphorus deficiency (3), or phosphorus toxicity (12) were in accordance with the expected phosphortus-iron ratio in each case.…”

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confidence: 97%

The Phosphorus-Iron Relationship in Genetical Chlorosis.

Dekock¹,

Hall²

1955

Plant Physiol.

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“…Some investigators have found less iron in chlorotic than in green leaves and have demonstrated a good correlation between iron and chlorophyll contents (8,15,18). But also, it has been found that chlorotic leaves may contain as much or more iron than comparable green leaves (7,11,19). Brown and Hen-dricks (2) state that the concentration of iron in plant tissues has not been a satisfactory index of deficiency.…”

mentioning

confidence: 99%