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Featured researches published by A. Wild.


Geoderma | 1995

Soil acidification: comparison of acid deposition from the atmosphere with inputs from the litter/soil organic layer

C. Gower; David L. Rowell; Stephen Nortcliff; A. Wild

Abstract At three relatively unpolluted sites in beech ( Fagus sylvatica ) woodlands on the Chiltern Hills of southern England, measurements were made over one year of the amount and composition of precipitation, throughfall, stemflow, and drainage below the soil organic layer. At two sites the soils were acidic and at the third the soil contained calcium carbonate. Comparison was made between the soil acidification potential (A.P.) of throughfall calculated as (H + + 2NH 4 + ) and the A.P. of the drainage water from the soil organic layer calculated as the difference between the sum of cations and the sum of Cl − , SO 4 2− and NO 3 − , that is, as HCO 3 − + organic anions. In the two woodlands with acidic soil the A.P. of throughfall was 198 mmol c m −2 a −1 and that of the drainage water was 224 mmol c m −2 a −1 ; the corresponding figures for the woodland with calcareous soil were 176 and 511 mmol c m −2 a −1 . The increases in the drainage water are attributed mainly to organic anions in the acidic soils and bicarbonate in the calcareous soil. The relative importance of the components in throughfall and the organic anions in drainage from the soil organic layer is discussed in relation to soil acidification.


Soil Biology & Biochemistry | 1986

The nature and stability of organic phosphates in leaf litter and soil organic matter in Nigeria

Irene Mueller-Harvey; A. Wild

Abstract The organic phosphorus components of leaf litter from a secondary forest in Nigeria were characterized as phospholipids, acid soluble esters, LiOH-extractable esters and residual phosphate. During incubation of the litter at 30°C for 8 months all four organic fractions were synthesized and the content of inorganic phosphate decreased. During cultivation of the same field site over a period of 22 months, the IP5 + 6, content of the soil did not change significantly, but there were significant decreases of phospholipids and of high molecular weight components. The high molecular weight components, which were not identified, represented the most important source of organic phosphorus that became available to plants, but phospholipids may also have been a source. The results indicate that the inositol phosphates in leaf litter were in too low concentration to have provided the amounts found in the soil.


Archive | 1988

Russell's Soil Conditions and Plant Growth

E.W. Russell; A. Wild


European Journal of Soil Science | 1972

NITRATE LEACHING UNDER BARE FALLOW AT A SITE IN NORTHERN NIGERIA

A. Wild


Archive | 1988

Soil acidity and alkalinity.

D. L. Rowell; A. Wild


European Journal of Soil Science | 1985

Soil organic C, N, S and P after forest clearance in Nigeria: mineralization rates and spatial variability

Irene Mueller-Harvey; A. S. R. Juo; A. Wild


Archive | 1988

Plant nutrients in soil: nitrogen.

A. Wild


Archive | 1988

Growth and functioning of plant roots.

P. J. Gregory; A. Wild


Archive | 1988

Microbial transformations of nitrogen.

P. J. Harris; A. Wild


Archive | 1988

The soil atmosphere.

D. Payne; P. J. Gregory; A. Wild

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C. Gower

University of Reading

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A. S. R. Juo

International Institute of Tropical Agriculture

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