1984
DOI: 10.1111/j.1365-3040.1984.tb01427.x
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Calcium as an environmental variable

Abstract: . The chemical state of calcium in the soil and the effects, both direct and indirect, which this can have on the growth and distribution of plants are considered. Recent advances in knowledge refer mainy to interactions (between nitrogen source, aluminium and pH, for example) for which there is now experimental evidence and which themselves are influenced by calcium. The impact of physical variables is less marked than first thought although seasonal effects of waterlogging and drought can be critical. It is … Show more

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Cited by 51 publications
(29 citation statements)
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“…Robinson and Rorison (1983b) predict that maximum rate of nitrate uptake will be dependent on root length density only at extremely low nitrate concentrations, but Short communication 133 that root density affected ammonium uptake at all concentrations. Lack of a striking difference between root architecture in the nitrate and ammonium patch for black birch may be the result of a general purpose root architecture tuned to ammonium exploitation that is not varied for nitrate.…”
Section: Discussionmentioning
confidence: 99%
“…Robinson and Rorison (1983b) predict that maximum rate of nitrate uptake will be dependent on root length density only at extremely low nitrate concentrations, but Short communication 133 that root density affected ammonium uptake at all concentrations. Lack of a striking difference between root architecture in the nitrate and ammonium patch for black birch may be the result of a general purpose root architecture tuned to ammonium exploitation that is not varied for nitrate.…”
Section: Discussionmentioning
confidence: 99%
“…The forests overlying sandstone soils cycle smaller amounts of Ca than the alluvial and heath forests. However, Ca is rarely a limiting nutrient and plants usually take up Ca in excess of that needed for cell metabolism (Rorison and Robinson 1984). Therefore, the low Ca concentrations in litterfall may be a product of the low Ca concentrations in sandstone soils and yet not an indication of Ca limitation (Table 1).…”
Section: Litterfallmentioning
confidence: 98%
“…Calcium Deficiency Absolute Ca deficiency, like H ion toxicity, is difficult to identify within the acid soil complex (Foy, 1974a(Foy, ,b, 1984(Foy, , 1988Kamprath and Foy, 1985). Most acid soils contain adequate total Ca for most plants (Kirkby and Pilbeam, 1984;Rorison and Robinson, 1984), and Ca deficiency symptoms are rarely seen in the field. Only in the most highly leached, acid, low CEC soils (sands, oxisols) would absolute deficiencies be likely.…”
Section: G Manganese Toxicitymentioning
confidence: 99%