The sulphate status of soils from north scotland

Scott, Norman M.; Munro, J. H. M.

doi:10.1002/jsfa.2740300104

Cited by 12 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although low levels of S have been reported in Fertilizer for perennial ryegrass I white clover 271 soils from north-east Scotland (Scott and Munro, 1979) there was no evidence of S deficiency in the experiment. Low rainfall and increasing soil moisture tensions during the summer appeared to reduce uptake of P ( Figure I) even though the level of extractable P in the soil was high (Table 3).…”

Section: Discussioncontrasting

confidence: 54%

Fertilizer requirements for maintenance of a perennial ryegrass (Lolium perenne L.)/white clover (Trifolium repens L.) pasture growing on a humus iron podzol in N.E. Scotland

Rangeley¹

1988

Grass and Forage Science

View full text Add to dashboard Cite

Fertilizer requirements for maintenance of a perennial ryegrass {Loliumperenne L.)/white clover {Trifolium repens L.) pasture growing on a humus iron podzol in N.E. Scotland ANNE RANGELEY Hill Farming Research Organisation. Edinburgh. UK Abstract Ryegrass/white clover pastures were reseeded on heather moor in north-cast Scotland in 1978/79. By 1981, despite moderate fertilizer applications, the pastures had deteriorated and dry matter (DM) production was low. After preliminary soil and herbage analysis an omission trial was carried out in 1982/83 at two sites (A and B) to identify the factors which limited production.At site A depressions in growth occurred in the absence of N, P and K. Perennial ryegrass was severely N deficient with concentrations in leaves of less than 22 g N kg"' in spring and summer even after application of 120 kg N ha ' annually. Rates of nitrogen fixation were high in spring but rapidly declined in June and July as the soil moisture tension increased. Application of N fertilizer also reduced the N: fixation rate. Deficiencies of F and K occurred despite apparently high levels of extractable F in the soil. Uptake of these nutrients was inhibited in the dry soil during the summer. White clover was more susceptible to drought than perennial ryegrass, probably because it rooted at a shallower depth.Growth at site B was limited by acidity and lack of N and K. The soil pH was 4 8 (s.d. = O 75) at 1 -5 cm depth. Application of 2 5 t lime ha"' in spring 1982 had not altered the pH by autumn 1983.It was concluded that methods of incorporating lime into the soil, together with ways of Correspondence and present address: Or Anne Marlis, 53 Lawrence Road. Marsh. Huddersfield, Yorks. HDl 4LW, UK, inereasing the rates of N2 fixation by white clover and transfer to grass, should be investigated further. Regular small applications of N and K may be necessary to sustain DM production at tbe level required by the farming system.

show abstract

Section: Discussioncontrasting

confidence: 54%

Fertilizer requirements for maintenance of a perennial ryegrass (Lolium perenne L.)/white clover (Trifolium repens L.) pasture growing on a humus iron podzol in N.E. Scotland

Rangeley¹

1988

Grass and Forage Science

View full text Add to dashboard Cite

show abstract

“…1). Approximately two -thirds of the samples contained less than 13 mg S g 71 , regarded as the minimum acceptable concentration for plant growth (Scott & Munro, 1979;Nguyen et al, 1989). A quarter of the soils had a very low to low status according to soils advisory categories in which the upper concentrations for very low, low, medium, and high categories are 4, 10, 14, 30 mg S g 71 soil, respectively.…”

Section: Extractable Soil Sulphur and Herbage Smentioning

confidence: 99%

Soil S availability in upland pastures of NE Scotland: relationship of extractable soil S and soil respiration to soil and site characteristics

Donald¹,

Chapman²,

Edwards³

et al. 1999

Soil Use and Management

View full text Add to dashboard Cite

Abstract. The mean extractable sulphur (S) concentration in 315 upland topsoil samples collected in 1988/89 from beneath pasture in NE Scotland was 13 μg S g−1 (range 2–77 μg S g−1). More than two thirds of the samples had S concentrations less than that acceptable for productive soils. Continued decreases in atmospheric S inputs may have increased this proportion subsequently. The analysis of herbage S also indicated that two‐thirds of the samples were below 0.2% S. A ‘respirometric index’, namely CO2 produced during cellulose decomposition without added S as a percentage of that produced with added S, was significantly less than 100% in a quarter of the soils. Results of three different extraction procedures suggested that sulphate in the soils was present mainly as free plus adsorbed rather than precipitated forms. Soil extraction identified a significant non‐sulphate S fraction, presumably organic S. The variability in extractable S stemmed from a combination of geographical, depositional and local site and soil factors. Extractable S was significantly correlated with soil organic matter content and inversely with soil pH and together these factors explained 37% of the variability. While significant differences in mean concentrations between geographical area, soil association and drainage status were evident, no trends could be observed between the major soil subgroups or with altitude.

show abstract

The measurement of sulphur‐containing amino acids in some scottish soils

Scott¹,

Bick²,

Anderson³

1981

J Sci Food Agric

View full text Add to dashboard Cite

Cysteic acid and methionine sulphone were measured in soil hydrolysates by ion exchange chromatography, after pretreatment of the soil with performic acid. In four mineral soils these amino acids accounted for 19-31 % of the carbon-bonded sulphur measured by difference between total organic sulphur and total organic sulphate, but only 8 % in a peat. When carbon-bonded sulphur is measured directly by reduction with Raney-Nickel, however, the amounts are lower, and cysteic acid and methionine sulphone together account for 80-100% of the values for the mineral soils and 50 % of that for the peat. It seems therefore that Raney-Nickel reduces only a fraction of the carbon-bonded sulphur consisting mainly of amino acid sulphur.

show abstract

The sulphate status of soils from north scotland

Cited by 12 publications

References 11 publications

Fertilizer requirements for maintenance of a perennial ryegrass (Lolium perenne L.)/white clover (Trifolium repens L.) pasture growing on a humus iron podzol in N.E. Scotland

Fertilizer requirements for maintenance of a perennial ryegrass (Lolium perenne L.)/white clover (Trifolium repens L.) pasture growing on a humus iron podzol in N.E. Scotland

Soil S availability in upland pastures of NE Scotland: relationship of extractable soil S and soil respiration to soil and site characteristics

The measurement of sulphur‐containing amino acids in some scottish soils

Contact Info

Product

Resources

About