Soil steaming increased fresh and dry weights and N and Mn contents of the plants. Leaching the steamed soil caused a further increase in Mn content but decreased yields and N content. The addition of straw to the steamed soil did not affect growth or N content but it reduced the Mn content. Plants grown on steamed soil had darker coloured leaves and a greater incidence of leaf margin necrosis and bad heading than plants grown on unsteamed soil. See also Sous Fertil. 33 [1230]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Heading of winter lettuce was impaired by poor light, and by NH4 and Mn accumulation resulting from soil steaming. The latter should be postponed until spring or done under relatively dry conditions, restricting the temperature and duration of treatment to a minimum. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Soil steaming caused an increase of 33 ppm mineral N. There was no significant effect on water-soluble P2O5. The influence of steaming on buffer-soluble Mg content varied with the treatment but there seemed to be a negative correlation with the P content. Steaming enhanced K solubility and increased buffer-soluble Mn content. Fe and Al soluble in buffer solution were slightly increased. 44 references. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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