Effect of deep plowing in soil penetration resistance,soil hydraulic conductivity  and barley(HordeumVulgare L.)  growth .

	Effect of deep plowing in soil penetration resistance,soil hydraulic conductivity and barley(HordeumVulgare L.) growth .
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 762-772 PDF (0 K)
Abstract
An experiment was conducted on the Marsh land at the Al-Nasr irrigation project, Which is located at Al-Mudaina district , Basrah Province, south of Iraq . during the winter season of 2007/2008. The soil texture(planted S1 and unplanted S0) was silty clay. The aim was to Study the effect of deep plowing on soil penetration resistance , soil hydraulic conductivity and plant growth. The work included surface tillage by moldboard plough with 25 cm depth(C1),, and the subsurface tillage by subsoiler plough to a depth of 50 cm(C2) , then with moldboard plough . These two soils were planted with barley seeds (Hordeum Vulgare L.).The soil physical properties were determined for four growth stages including, Germination, branching , Flowering , and maturity . After the soil was prepared, it was divided into experimental units of 4*10 m.The experimental treatments were distributed into three replicates using the factorial experiment in complete randomized block design . The results indicated that the existing of impermeable layer at 30 cm depth caused an increase in penetration resistance (PR), and a decrease in the saturated hydraulic conductivity (Ks) of the two soil (S1 and S0) .using subsoiler plough (C2) resulted an increase in Ks , whereas the PR were decreased in comparison with (C1) treatment , these influences continuous until the end of growth season. The C2 caused an increase in dry matter of plants in comparison with C1 for both S1& S0.

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