Conversion of Nonexchangeable Potassium to Exchangeable Forms in a Hawaiian Soil

Ayres, A. S.; Takahashi, Masao; Kanehiro, Y.

doi:10.2136/sssaj1947.036159950011000c0032x

Cited by 15 publications

(5 citation statements)

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“…Some authors (e.g. Ayers et al, 1947) provided that the capital of nutrients in minerals and slowly mineralizing organic matter is sufficient (which begs the question of what is sufficient). Miller et al, 1980) related removal to the atmospheric inputs over a rotation.…”

Section: Implications For Managementmentioning

confidence: 99%

The influence of stand development on nutrient demand, growth and allocation

Miller

1995

Plant Soil

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As an even-aged stand develops growth is concentrated first on leaves and fine roots, as a result nutrient accumulation is very rapid. During this early stage there is a distinct species effect whereas later nutrient uptake becomes a function of growth rate irrespective of species. Once canopy is closed up to two thirds of the nutrients required for growth can be obtained by retranslocation from older or dying tissues, an efficient conservation mechanism that leads to a reduction in the demands that are further reduced by the cycle through the litter layer. In consequence nutritional problems are most likely in the early years while the green crown is being constructed. Later in the rotation problems are unlikely unless nutrient cycles are disturbed, for example by thinning or as a result of excessive accumulation of humus. The eventual clear felling is a major disruption to nutrient cycles. Accelerated litter decomposition can lead to leaching losses, although this can be short lived, and burning if practised can have a major impact on poor sites. Nutrient loss in material removed from the felling site, whether or not harvested, is not high but is much increased if crowns are removed, particularly for the heavily crowned species. The importance of such loss clearly varies with site but may be significant for more than just loss of nitrogen, with loss of calcium, phosphorus or even organic matter per se all being possibly causes of worry.

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Section: Implications For Managementmentioning

confidence: 99%

The influence of stand development on nutrient demand, growth and allocation

Miller

1995

Plant Soil

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“…It has been used by Peech andBradfield (1934), Gilligan (1936), Ayres et at. (1947), andReitemeier (1951).…”

Section: Electric Currentsmentioning

confidence: 99%

Potassium Dynamics in Soils

Sparks

1987

Advances in Soil Science

337

192

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“…For example, elephant grass removed about 3,500 pounds per acre of potassium from unfertilized Low Humic Latosol of Hawaii during a 4½ year period ( A y r e s et al 1). For example, elephant grass removed about 3,500 pounds per acre of potassium from unfertilized Low Humic Latosol of Hawaii during a 4½ year period ( A y r e s et al 1).…”

Section: O B I L I Z a T I O N O F N O N -E X C H A N G E A B L E Pmentioning

confidence: 99%