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  1. No Access

    Chapter

    Nitrogen Fixation and N Balance in Subterranean Clover Pasture Associated with Annual and Perennial Grasses

    D. Chen, J. Evans, P. M. Chalk, R. E. White in Nitrogen Fixation: From Molecules to Crop … (2000)

  2. No Access

    Article

    Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures

    In areas that remain unaffected by industrial pollution soil acidification is mainly caused by the release of protons (H+) during the oxidation of carbon (C), sulphur (S) and nitrogen (N) compounds in soils. In t...

    N. S. Bolan, M. J. Hedley, R. E. White in Plant and Soil (1991)

  3. No Access

    Chapter

    Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures

    In areas that remain unaffected by industrial pollution soil acidification is mainly caused by the release of protons (H+) during the oxidation of carbon (C), sulphur (S) and nitrogen (N) compounds in soils. In t...

    N. S. Bolan, M. J. Hedley, R. E. White in Plant-Soil Interactions at Low pH (1991)

  4. No Access

    Article

    The variability of nitrifying activity in field soils

    The effect of pH on the activity of nitrifying organisms was examined in pasture soils ranging in pH from 4.9 to 7.3, using a short-term nitrification assay (SNA). The optimum pH for nitrifier activity (pHopt) wa...

    R. G. V. Bramley, R. E. White in Plant and Soil (1990)

  5. No Access

    Article

    The influence of phosphate nutrition on H ion efflux from the roots of young rape plants

    Changes in pH around the roots of young rape plants were studied using a nutrient film technique which allowed either part or all of the root system to be subjected to specific nutrient treatments. The rapidit...

    H. Moorby, R. E. White, P. H. Nye in Plant and Soil (1988)

  6. No Access

    Article

    The effect of phosphate nutrition of young rape plants on nitrate reductase activity and xylem exudation, and their relation to H ion efflux from the roots

    Levels of nitrate reductase activity (N.R.A.) were measured in shoots and roots of P sufficient and P deficient rape plants and changes in N.R.A. examined in relation to the onset of H ion efflux from the root...

    H. Moorby, P. H. Nye, R. E. White in Plant and Soil (1988)

  7. No Access

    Article

    A theoretical consideration of the implications of cell clustering for the prediction of nitrification in soil

    The time course of nitrate production is different in different soils; in some soils, nitrate is produced at a constant rate while in others, this rate increases with time, often exponentially. Mechanistic mod...

    P. R. Darrah, R. E. White, P. H. Nye in Plant and Soil (1987)

  8. No Access

    Article

    The effect of high solute concentrations on nitrification rates in soil

    A short term nitrification assay (<18 h) was used to assess the effect of high concentrations of different solutes on the rate of nitrate production. High solute concentrations were found to inhibit nitrificat...

    P. R. Darrah, P. H. Nye, R. E. White in Plant and Soil (1987)

  9. No Access

    Article

    Modelling growth responses of soil nitrifiers to additions of ammonium sulphate and ammonium chloride

    Following the addition of 0–75 μmole N g−1 as ammonium chloride or ammonium sulphate to a sandy loam soil the nitrate formed was measured daily for a period of 15–17 days. The nitrate produced as a function of ti...

    P. R. Darrah, P. H. Nye, R. E. White in Plant and Soil (1985)

  10. No Access

    Article

    The influence of nitrate nutrition on H+ efflux by young rape plants (Brassica napus cv. emerald)

    Changes in pH around the roots of young rape plants (Brassica napus cv. emerald) were studied using a nutrient film technique that allowed part or whole of the root system to be subjected to specific nutrient tre...

    H. Moorby, P. H. Nye, R. E. White in Plant and Soil (1985)

  11. No Access

    Article

    Net mineralization and nitrification rates in a clay soil measured and predicted in permanent grassland from soil temperature and moisture content

    Net mineralization of N and net nitrification in field-moist clay soils (Evesham-Kingston series) from arable and grassland sites were measured in laboratory incubation experiments at 4, 10 and 20°C. Three dep...

    J. H. Macduff, R. E. White in Plant and Soil (1985)

  12. No Access

    Article

    Components of the nitrogen cycle measured for cropped and grassland soil-plant systems

    Inputs and outputs to the N balance of a clay soil catchment (Evesham and Kingston series) under grassland and cereals at Wytham near Oxford were measured over 2 years. Soil mineral N (NH4+NO3) was measured to 1 ...

    J. H. Macduff, R. E. White in Plant and Soil (1984)

  13. No Access

    Article

    Decomposition of plant residues of variable C/P ratio and the effect on soil phosphate availability

    Green manuring was simulated in the laboratory by adding six-week-oldVica faba residues (C/P ratios between 123 and 506) to a calcareous soil (Kingston series) at a rate equivalent to 8 t C ha−1 15 cm. The mixtur...

    R. E. White, A. T. Ayoub in Plant and Soil (1983)

  14. No Access

    Article

    Studies on mineral ion absorption by plants

    The effect of Al and P on the growth of lucerne (Medicago sativa) was studied in nutrient solutions in which aluminium phosphate did not precipitate. Al and P retained in the free space of the roots was washed ou...

    R. E. White in Plant and Soil (1977)

  15. No Access

    Article

    The existence of polymeric complexes in dilute solutions of aluminium and orthophosphate

    The presence of soluble polymeric complexes in dilute solutions (10–30 μM) of aluminium and phosphate at 25°C was demonstrated by paper electrophoresis and confirmed by chemical analyses and measurements of 32 P ...

    R. E. White, L. O. Tiffin, A. W. Taylor in Plant and Soil (1976)

  16. No Access

    Article

    Studies on mineral ion absorption by plants

    The rate of accumulation of phosphorus in the roots, and its transport to the shoots, of whole plants grown in very dilute nutrient solutions, did not conform to the kinetic models derived from studies with ex...

    R. E. White in Plant and Soil (1973)

  17. No Access

    Article

    Studies on mineral ion absorption by plants

    The relative yield response and phosphate uptake ofS. humilis, P. atropurpureus andD. intortum, grown on a very deficient soil, enriched with phosphate, were measured at four successive harvests during 42 days gr...

    R. E. White in Plant and Soil (1972)

  18. No Access

    Article

    Studies on the phosphate potentials of soils

    P. H. T. Beckett, R. E. White in Plant and Soil (1964)

  19. No Access

    Article

    Studies on the phosphate potentials of soils

    When a sample of Upper Greensand soil was shaken in dilute solutions of calcium chloride containing orthophosphate, microbial activity was sufficiently stimulated to alter the measured value of Schofield's pho...

    R. E. White in Plant and Soil (1964)

  20. No Access

    Article

    Studies on the phosphate potentials of soils

    R. E. White, P. H. T. Beckett in Plant and Soil (1964)