Mansoura University, Faculty of AgricultureJournal of Soil Sciences and Agricultural Engineering2090-36854220130201ROLE OF MAGENISUM, WATER CONTENT AND FRETILIZERS ON SOME ELEMENTS AVAILABILITY IN CLAYEY SOIL71835054610.21608/jssae.2014.50546ENS. A. HammadSoil Sci. Dept., Fac. of Agric., Mansoura Univ., Egypt.T. M. El-ZeherySoil Sci. Dept., Fac. of Agric., Mansoura Univ., Egypt.Y. S. El-ArquanSoil Sci. Dept., Fac. of Agric., Mansoura Univ., Egypt.Marwa G. El-MoogySoils, Water &Environment Institute., agric. Res. Centre, Giza, Egypt.Journal Article20130201A Laboratory experiment carried out during 2010/2011 at Fac. Agric., MansouraUniv., to study some nutrients availability in clayey soil as affected by magnesium, water content and mineral fertilizers. The used experimental design was spilt-spilt design with three replicated.
- Statistical analysis of the obtained results reveal that the content of all Av. nutrients increased significantly in the upper soil section (0-5 cm) with Mg addition, 150% field capacity and fertilizer treatments
- Data reveal that the content of all Av. nutrients increased significantly in the lower soil section (5-10 cm) with Mg addition, 150% of field capacity and fertilizer treatments but the content of Av. Ammonium increased insignificantly with adding of Mg.
- Data reveal that the increasing percent of all Av. nutrients concentration caused by magnesium and water content under different fertilizer condition. It noticed under different mineral fertilizer treatments that treatment with Mg1W2 gave the highest increasing percentage of all Av. nutrients as compared to control (Mg0W1) in both section.
- Data reveal that, the fertilizer treatment F3 application raising the content of Av. K in the first section of soil column. It also shows that the best fertilizer treatments for increase the content of Av. NH<sub>4</sub><sup>+</sup> and NO<sub>3</sub><sup>-</sup> in the first section of soil column were F2. Also with adding of treatment of F5, a highly increase of Av. P content in the first section of soil column high increased in both section.
-It can be concluded that the highest mean values of the content of all Av. nutrients obtained from Mg1W2 among all treatment.Mansoura University, Faculty of AgricultureJournal of Soil Sciences and Agricultural Engineering2090-36854220130201EFFECT OF SOIL PUDDLING AND PREVIOUS CROP ON SOME SOIL PROPERTIES AND RICE PRODUCTIVITY IN CLAY SOILS85925054510.21608/jssae.2014.50545ENA. S. El-HenawySoils and Water Dept., Fac. of Agric., Kafrelsheikh Univ., EgyptJournal Article20130209A field experiment was conducted at the experimental farm of the faculty of agriculture, Kafrelsheikh University, Kafr El-Sheikh, Egypt, in 2007 summer season. The experiment was conducted to study the effect of soil puddling (with puddling or without), previous crop (wheat or clover) and interaction between them on some soil properties and productivity of rice crop. Combined design with three replicates was used. It was found that, values of soil salinity under puddling soils were higher than that without puddling. Soil bulk density was significantly affected by puddling, previous crop and interaction between them in the two layers of soil except, puddling in surface layer (0-30 cm) was insignificant. Values of soil bulk density were higher under wheat-rice than those under clover-rice and it were higher under puddling soil than those without puddling. Infiltration rate was significantly affected by puddling and non significantly by previous crop. Infiltration rate values were higher under clover-rice than those under wheat-rice. Hydraulic conductivity of soil was insignificant affected by puddling and interaction between puddling and previous crop. It was significantly affected by previous crop. All parameters of aggregates were significantly affected by previous crop and its values were higher under clover-rice than those under wheat-rice. Values of rice yield without puddling were higher than those under puddling. The highest value of rice yield was found under clover-rice without puddling. Generally, it was recommended to cultivate rice after clover or wheat without puddling to increase the yield and save the cost of operation puddling.Mansoura University, Faculty of AgricultureJournal of Soil Sciences and Agricultural Engineering2090-36854220130201IMPROVING WATER PRODUCTIVITY FOR MAIZE AT NORTH DELTA SOILS, EGYPT931075054410.21608/jssae.2014.50544ENKh . H. El – HamdiSakha Agric. Res. Station , Soil Conservation and Improvement Research DepartmentM. M. S. RagabSakha Agric. Res. Station , Soil Conservation and Improvement Research DepartmentA. M. SaadSakha Agric. Res. Station , Soil Conservation and Improvement Research DepartmentJournal Article20130218Two field experiments were carried out at Kafr El - Sheikh Governorate during summer season of 2011 , the first one was conducted in Sakha farm ( Normal soil ) , while the second experiment was conducted at El- Hamoul district ( saline soil ) .
Split – split – plot design with three replicates was used. Where, the main plots were assigned to irrigation timing (15, 26 and 36 days) after life watering and then maize plants were exposed to depletion (20, 40 and 60 %) from available water. Sub plots were devoted to nitrogen fertilizer levels i.e. 0, 80, 100 and 120 kg Nfed<sup>-1</sup>. , and the sub – sub – plots were occupied to compost treatments i.e. without and with compost application (3 ton fed <sup>-1</sup>).
Results indicated that , under normal soil conditions , the highest value of water productivity was obtained by irrigation after 36 days after life watering followed by irrigation at 60 % depletion from available water as well as adding both compost and 120 kg Nfed<sup>-1</sup> . While , in saline soil the highest value of water productivity was achieved by irrigation after 36 days after life watering followed by irrigation at 20 % depletion from available water in addition to compost and 120 kg Nfed<sup>-1</sup>.