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|Title:||The Effects of Hay and Straw Mulches on Soil Temperatures and Moisture Values|
|Other Titles:||The Effects of Hay and Straw Mulches on Soil Microclimates|
|Authors:||Hannell, Christine Brenda|
|Advisor:||Hannell, F. G.|
Davies, J. A.
|Keywords:||soil temperature, soil moisture, mulches, hay, straw, mulch diameter, seasonal changes, soil climate|
|Abstract:||<p> Measurements of soil temperature and soil moisture values beneath and in close proximity to circular mulches of hay and straw were made. The experiments were conducted to determine whether sub-surface effects vary with mulch diameter, and to acquire information concerning the seasonal changes in such effects produced by a mulch of most favourable diameter. The modification of soil climate increased with a greater mulch size. A circular mulch with a diameter of 60 cms or less was considered to be of no practical value for winter protection of roots. The mulch with a 240 cms. diameter, provided some winter protection, preventing freezing of the soil, and, in summer caused considerable modification of the sub-surface climate. In the summer, soil temperatures were lowered by values of up to 5°C and 2.5°C at 5 and 100 cms. depth respectively. After a two-month period of dry weather, moisture values at 0-10 cms. depth beneath the mulch were 20% by volume, whereas, outside the mulch they were 5%. These differences decreased with increasing depth but were over 10% at 100 ems. </p>|
|Appears in Collections:||Open Access Dissertations and Theses|
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|Hannell_Christine_B_Oct1971_MSc.pdf||59.04 MB||Adobe PDF||View/Open|
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