Estimates of soil phosphorus for different soil series

Reith, J. W. S.; Inkson, R. H. E.; Scott, NM; Caldwell, KS; Ross, J. A. M.; Simpson, WE

doi:10.1007/bf01051056

Cited by 13 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Neither of the current systems employ any modifying or weighting factor based on accompanying information such as soil properties. Soil type was introduced briefly for the north of Scotland (MISR/SAC, 1985) with a recommendation system developed from a combination of long-term field and pot trials coupled with knowledge of differences in the reactivity of P and sorption properties (Reith et al, 1987). While being based on sound experimental understanding and evidence, the practicality of extrapolating an essentially regionally based system up to a national advisory service meant it was never progressed.…”

Section: Discussionmentioning

confidence: 99%

Regional trends in Scottish advisory soil acidity and phosphorus results: significance of management history, land use and soil attributes

Edwards

Sinclair²,

Coull

et al. 2015

Soil Use and Management

View full text Add to dashboard Cite

Four geographically distinct regions of Scotland are used to describe temporal and spatial trends in soil phosphorus (P) using ca. 180 000 routine advisory samples which included information on previous and next crop. Regional differences in Modified Morgan's extractable P concentrations exist primarily in response to differences in land use and particularly the greater role of livestock in the west compared to arable cropping in the east. No obvious or consistent temporal trend in extractable P was apparent, but a very wide range of soil properties and extractable P concentrations was evident. The current (since 2010) target soil P status is moderate (M) for cereal-based arable rotations and the upper half of moderate (M+) for rotations with potatoes, and more than half the samples fell into this range (with 40% MÀ). Some ca. 30% of samples fell below this, while 14% had high or very high P status, most noticeably where the previous crop was either potatoes, vegetables or berries. Half (ca. 13 000) of the samples with a low soil P status also had a below optimum pH. An apparent contradiction between the regularly reported long-term declines in agricultural P surplus not being matched by a drop in extractable soil P status is discussed. This 'lag effect' means many Scottish agricultural soils have the capability to buffer change in extractable soil P. We make the first attempt to link advisory P data with information from the National Soil Database of Scotland and explore the value of introducing 'soil type' into the P fertilizer recommendation system.

show abstract

Section: Discussionmentioning

confidence: 99%

Regional trends in Scottish advisory soil acidity and phosphorus results: significance of management history, land use and soil attributes

Edwards

Sinclair²,

Coull

et al. 2015

Soil Use and Management

View full text Add to dashboard Cite

show abstract

“…Their primary interest was change in soil carbon content over 50–70 years. A series of experiments were conducted between 1950 and early 1980s, by the Macaulay Institute of Soil Research (now The James Hutton Institute), to support national agricultural improvements in soil fertility and food security (Reith et al, 1987). Over 30 years, approximately 1000 field experiments were conducted on sites chosen to represent the NE Scotland soil conditions and responses to inorganic P inputs.…”

Section: Methodsmentioning

confidence: 99%

Soil phosphorus over a period of agricultural change in Scotland

Tweedie

Haygarth

Edwards

et al. 2021

European J Soil Science

View full text Add to dashboard Cite

Yield increases by use of phosphorus (P) fertiliser has been a defining aspect of last century's agriculture, but in many countries P inputs are now being regulated to avoid ecological damage and improve agricultural sustainability. We tested the hypothesis that P forms and functions in agricultural soils have changed over a period of 50–70 years of agricultural change using topsoils from 35 agricultural sites in North East Scotland compared at ‘original’ and ‘resampled’ timepoints. The original dried and archived samples were collected between 1951 and 1981, and resampling took place in the autumn of 2017 with all samples reanalysed at the same time and by same methods. A range of soil extractants, from labile (water soluble) P, carbon (C) and nitrogen (N) forms, to surface exchangeable P (acid ammonium oxalate extraction), to complexed P (NaOH‐EDTA extraction), were compared with agronomic soil test P (modified Morgan; MM‐P), soil pH, and, on a subset of five time pairs (n = 10), specific P compounds using 31P NMR spectroscopy. Whilst MM‐P had declined significantly in time, all soils were originally and remained at high soil P status. In contrast, no change in labile P pools, nor in the more refractory P pools that replenish labile P, were observed. In the subset analysed by NMR, orthophosphate P consistently increased in concentration. This suggests that soil P shows a slow (multidecadal) response to the documented reductions in fertiliser P for the study region. Significantly greater soil pH (by 0.4 units) over time and reduced water‐soluble C and N forms suggests that labile P in contemporary soils exists in a biogeochemical environment of enhanced solubility and in excess to other available macronutrients that control its microbial cycling. This study represents a long and important period of changing drivers acting on soil P change with potential to improve understanding future soil P trajectories. The value of archived historical soils samples is shown, if care in interpretation of storage implications is made. Highlights Phosphorus fractions in agricultural soil were compared at two timepoints 50–70 years apart. Whilst soil test P declined with time, other labile and refractory P pools did not change. The readjustment of P pools is slow even to substantial change in fertiliser inputs. The investigation of long‐term land use to inform future policy is enabled by soil archives.

show abstract

“…Following the digestion of 1 g (dry) soil with a mixture of acids in the proportion of 2.5 mL concentrated HNO 3 and 10 mL concentrated HCl (USEPA, 3050B), Ca concentration in the soil was measured using flame atomic absorption spectrometry (AA-6300 Shimadzu, Japan) at a wave length of 422.7 nm. Particles finer than 2 mm were used for TN, TP and Ca analyses (Reith et al, 1987;.…”

Section: Laboratory Analysismentioning

confidence: 99%

Spatial and temporal heterogeneity ofEragrostis curvulain the downstream flood meadow of a regulated river

Gomes

Asaeda

2009

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-We studied the spatiotemporal trends of Eragrostis curvula (Schrad.) Nees in a flood meadow of a regulated river. The response variables, including the abundance of colonies, colony sizes, flowering spikes, biomass and root structure were checked against a set of environmental variables. These variables included distance from the river, substrate conditions (stony to sandy), soil nutrients (total nitrogen, phosphorous and calcium) and soil moisture. Relationships were evidenced using redundancy analysis. Response variables were found to be distinctive and based on substrate conditions (i.e. stony or sandy). The variables 'distance from the river' and 'soil phosphorous' contributed significantly to the overall variance. Stony habitats were observed to have lower soil nutrient levels and were characterised by monospecific stands of E. curvula, while the high nutrient levels of sandy habitats promoted heterogeneous herbaceous vegetation growth. Primary production, especially belowground, was measured to be significantly higher (t-test, P<0.05) in stony habitats. Spatiotemporal trends suggested that, irrespective of the number of colonies, E. curvula demonstrated significant levels of adaptation to micro-environments through biomass allocation and the morphological plasticity of its roots. The study results suggest that river regulation and the subsequent reduction in the frequency of inundation, in addition to the reduction of nutrients and fine sediment supply downstream, give a competitive edge to E. curvula over other herbaceous species.

show abstract

Estimates of soil phosphorus for different soil series

Cited by 13 publications

References 9 publications

Regional trends in Scottish advisory soil acidity and phosphorus results: significance of management history, land use and soil attributes

Regional trends in Scottish advisory soil acidity and phosphorus results: significance of management history, land use and soil attributes

Soil phosphorus over a period of agricultural change in Scotland

Spatial and temporal heterogeneity ofEragrostis curvulain the downstream flood meadow of a regulated river

Contact Info

Product

Resources

About