Sulphuric—perchloric acid digestion of plant material for the determination of nitrogen, phosphorus, potassium, calcium and magnesium

Cresser, Malcolm S.; Parsons, J. W.

doi:10.1016/s0003-2670(01)84273-2

Cited by 132 publications

(85 citation statements)

References 2 publications

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“…Afterwards, the samples were dried in an oven at 70°C for 72 h. The soluble sugars (Ss) in the dried samples were measured using the phenol-sulfuric acid method and a spectrophotometer apparatus (UV/ VIS Perkin Elmer-Lambda 25-USA) with a wavelength of 485 nm (Kochert, 1978). Also, the dried samples were digested using sulfuric acid-hydrogen peroxide (Cresser and Parsons, 1979). Finally, K + c in the extracts were measured with a flame photometer apparatus (Jenway, PFP-7, UK).…”

Section: Methodsmentioning

confidence: 99%

Some physiological responses of wheat and bean to soil salinity at low matric suctions

Khatar

Mohammadi

Shekari

2017

International Agrophysics

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A b s t r a c t. The effect of soil matric suction (2-33 kPa) and salinity (soil solution electrical conductivity 0.7-8 dS m -1 for bean and 2-20 dS m -1 for wheat) on some physiological characteristics of bean and wheat in a clay loam soil under greenhouse condition was investigated. The results showed that the leaf chlorophyll content index and potassium concentration decrease under salinity stress and increase with matric suction from 2 to 33 kPa suction for both plants. The wheat chlorophyll content index declines during the stress spell but bean chlorophyll content index remains nearly constant. The lowest values of the content of soluble sugars and the highest values of leaf proline content are observed at 2 kPa matric suction (highest aeration stress) for bean and wheat. As matric suction increases from 2 to 6 kPa, the soluble sugars increases and proline content decreases significantly and then soluble sugars decreases and proline content increases until 10 kPa suction, and the soluble sugars remains nearly constant at the higher matric suctions for both plants. While the electrical conductivity effect on the soluble sugars is not significant, the values of proline content for both crop increase significantly with electrical conductivity. It was shown that the aeration stress can result in more considerable and rapid physiological responses, in comparison with salinity stress. There is a strong correlation between wheat and bean chlorophyll content index and potassium concentration under salinity and aeration stresses.K e y w o r d s:

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Section: Methodsmentioning

confidence: 99%

Some physiological responses of wheat and bean to soil salinity at low matric suctions

Khatar

Mohammadi

Shekari

2017

International Agrophysics

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“…The digest was cooled and diluted to 100 ml with deinonised water. The concentration of nitrogen in leaves and stems was determined following steam distillation in the presence of 40% NaOH and titrated with HCl (Cresser and Parsons 1979). The concentrations of potassium in leaves and stems were determined by feeding the extract into a flame photometer.…”

Section: Determination Of Nitrogen and Potassiummentioning

confidence: 99%

Water use efficiency, biomass production, nitrogen and potassium uptake and yield of tomato (Lycopersicon esculentum cv. Ratan) Planta grown under surface drip and flood irrigation

Ali

Rahman

2013

J. Asiat. Soc. Bangladesh, Sci.

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An experiment was conducted in wooden boxes to evaluate water use efficiency, biomass production, nitrogen and potassium uptake and yield of tomato plants (Lycopersicon esculentum) grown under flood irrigation (FI) and surface drip irrigation (SDI). Leaf area, leaf area index, biomass production and yield of tomato plants were significantly (P<0.05) higher in SDI than FI treatment. Biomass production (g/plant) was 53.3 and 42.2 and yield of tomato (kg/plant) was 1.27 and 0.99 in SDI and FI treatments, respectively. Surface drip irrigation increased water use efficiency (Kgm -3 ) of tomato plants by two fold (37.88) compared to flood irrigation ( 19.88). Significantly (P<0.05) higher concentrations of nitrogen in leaf (3.22%) and stem (2.62 %) were measured for tomato plants grown under SDI than FI (2.63 and 2.19 %). Potassium concentrations on the other hand, showed no significant differences.

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“…Chlorophyll a and b concentrations were calculated from these absorbencies (Hendry and Grime, 1993) and expressed in terms of fresh mass. Needles for chemical analyses of base cations and nutrients were analysed by the method of Cresser and Parsons (1979) and expressed on an oven dried weight basis.…”

Section: Seedling Biological Measurementsmentioning

confidence: 99%

The effects of H2SO4 and (NH4)2SO4 treatments on the chemistry of soil drainage water and pine seedlings in forest soil microcosms

Stutter

Alam

Langan³

et al. 2004

Hydrol. Earth Syst. Sci.

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An experiment comparing effects of sulphuric acid and reduced N deposition on soil water quality and on chemical and physical growth indicators for forest ecosystems is described. Six H 2 SO 4 and (NH 4 ) 2 SO 4 treatment loads, from 0 44 and 0 25 kmol c ha -1 yr -1 , respectively, were applied to outdoor microcosms of Pinus sylvestris seedlings in 3 acid to intermediate upland soils (calc-silicate, quartzite and granite) for 2 years. Different soil types responded similarly to H 2 SO 4 loads, resulting in decreased leachate pH, but differently to reduced N inputs. In microcosms of calc-silicate soil, nitrification of NH 4 resulted in lower pH and higher cation leaching than in acid treatments. By contrast, in quartzite and granite soils, (NH 4 ) 2 SO 4 promoted direct cation leaching, although leachate pH increased. The results highlighted the importance of soil composition on the nature of the cations leached, the SO 4 adsorption capacities and microbial N transformations. Greater seedling growth on calc-silicate soils under both treatment types was related to sustained nutrient availability. Reductions in foliar P and Mg with higher N treatments were observed for seedlings in the calc-silicate soil. There were few treatment effects on quartzite and granite microcosm tree seedlings since P limitation precluded seedling growth responses to treatments. Hence, any benefits of N deposition to seedlings on quartzite and granite soils appeared limited by availability of co-nutrients, exacerbated by rapid depletion of soil exchangeable base cations.

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Sulphuric—perchloric acid digestion of plant material for the determination of nitrogen, phosphorus, potassium, calcium and magnesium

Cited by 132 publications

References 2 publications

Some physiological responses of wheat and bean to soil salinity at low matric suctions

Some physiological responses of wheat and bean to soil salinity at low matric suctions

Water use efficiency, biomass production, nitrogen and potassium uptake and yield of tomato (Lycopersicon esculentum cv. Ratan) Planta grown under surface drip and flood irrigation

The effects of H2SO4 and (NH4)2SO4 treatments on the chemistry of soil drainage water and pine seedlings in forest soil microcosms

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