{"id":3196,"date":"2021-03-22T20:18:36","date_gmt":"2021-03-22T20:18:36","guid":{"rendered":"http:\/\/agri-research-journal.net\/SjarEn\/?p=3196"},"modified":"2021-03-22T20:19:32","modified_gmt":"2021-03-22T20:19:32","slug":"the-effect-of-mechanical-disassembly-of-the-subsoil-compressed-layers-on-its-physical-and-hydrodynamic-characteristics-under-different-levels-of-pressure","status":"publish","type":"post","link":"https:\/\/agri-research-journal.net\/SjarEn\/?p=3196","title":{"rendered":"The effect of mechanical Disassembly of the subsoil compressed layers on its physical and hydrodynamic characteristics under different levels of pressure"},"content":{"rendered":"

Jina Eskef *(1)<\/sup>, <\/sub>Jihad Ibrahim (1)<\/sup>, Rabei Zaineh(2) <\/sup>\u00a0and Nabil Habib(1)<\/sup><\/strong><\/p>\n

(1)- Dept. of soil and water, Faculty of Agriculture, Tishreen University. Lattakia, Syria.<\/p>\n

(2)- Lattakia center, General commission for scientific Agriculture research (GCSAR), Damascus, Syria<\/p>\n

(3) Dept. of Field crop, Faculty of Agriculture, Tishreen University. Lattakia, Syria.<\/p>\n

(*Corrsponding author: Jina Eskef. E-mail: Jina.Eskef@gmail.com<\/u>).<\/p>\n

Received: 18\/9\/2019 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Accepted: 14\/7 \/2020<\/p>\n

\u00a0<\/u><\/p>\n

Abstract<\/strong>:<\/p>\n

The research was conducted in Lattakia ( at Dabba research station) in clay-loam soil,\u00a0 it had designed as Randomized Complete Block Design ( 6 treatments and 3 replicates for each treatment) the soil was exposed to three levels of pressure (0, 187.5, 307.4 ) Kpa respectively, then the compressed soil was tilled up to 20cm in depth homogeneously and the subsurface soil remained compressed\u00a0 in different levels, a mechanical disassembly for compressed subsurface soil was conducted at shrinkage limit (SL) via mechanical disassembly in addition to control treatment without disassembly. The study showed a significant increase in bulk density by increasing the pressure and the highest value was at 307.4 Kpa, the disassembly led to decrease it significantly by 0.11 and 0.17 g\/cm3<\/sup> at the pressure levels 187.5 and 307.4 Kpa respectively. That confirm the important role of disassembly by moving the layers of compressed subsurface soil. Also, the mechanical disassembly led to a significant increase in the bulk of macro porosity by 4.17% at 187.5 Kpa and 6.44% at 307.4 Kpa compared with no disassembly treatments. As well as the pores which their diameter more than 10\u00b5m increased by 3.78 and 6.7% at the pressure levels of 187.5 and 307.4 Kpa respectively. The soil compacting led to decrease in the size of pores that contains the available water capacity by 3.69% and the mechanical disassembly increased these pores by 2.91% at 307.4 Kpa. Also, the soil compacting and increasing its density led to decrease the values of saturated conductivity coefficient with increasing the pressure and the value of pressure was 1.17m\/day at 187.5 Kpa and decreased to 0.091m\/day at 307.4Kpa exceeding the threshold limit value, the disassembly led to a significant increase in its value and the increment value was 0.69 and 1.43m\/day at the pressures 187.5 and 307.4 Kpa respectively.<\/p>\n

\u00a0Keywords<\/strong>: Compression, Subsurface Soil, Mechanical disassembly, physical properties.<\/p>\n

Full paper in Arabic:\u00a0PDF<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Jina Eskef *(1), Jihad Ibrahim (1), Rabei Zaineh(2) \u00a0and Nabil Habib(1) (1)- Dept. of soil and water, Faculty of Agriculture, Tishreen University. Lattakia, Syria. (2)- Lattakia center, General commission for scientific Agriculture research (GCSAR), Damascus, Syria (3) Dept. of Field … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3196","post","type-post","status-publish","format-standard","hentry","category-sjar"],"_links":{"self":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/3196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3196"}],"version-history":[{"count":2,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/3196\/revisions"}],"predecessor-version":[{"id":3200,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/3196\/revisions\/3200"}],"wp:attachment":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}