The plant macro and micro nutrients as well as organic matter make sludge disposal in soil an attractive option. Nitrogen has received most attention and it is normally the most abundant sludge nutrient. One of the best alternatives to waste disposal is through the soil-plant system as a fertilizer. Based on properties different wastes can be co-recycled in order to take simultaneously the best profit and minimize environmental pollution .An experiment was carried out with a calcareous soil. Using six different doses of a sewage sludge were treated. A crop barley (Hordium Vulgare, Giza 123 ) was grown in the amended soils. The application of sewage sludge to the calcareous soil lowered the pH of the soil, although the value always around 7.75-7.9 at the end of the experiment. In the barley plants it was observed that the higher the yield, the higher the nitrogen contents. Electrical conductivity rose with organic amendment. Also it improved the nutrient level of the soil, particularly nitrogen and available phosphorus.

A field experiment was carried out during 2009/2010 season to evaluate organic and inorganic fertilization effects on vegetative growth, nutrient uptake and volatile oil of marjoram (Majorana hortensis L.) plant. The organic fertilization (sheep manure) was added a month before cultivation. Sheep manure at the rate of 20 M 3 fed

during the summer season of 2014 to evaluate the effect of some seaweed on remediation of a soil contaminated with heavy metals (Zn, Pb, Mn and Cu), also to assess the effect of seaweed on growth (roots and shoots) contents from heavy metals of red radish (Raphanussativus L.). Surface soil samples (0-30cm) were collected from El-Gable El-Asfer farm located 25km northeast Cairo, Egypt. The experiment involved 39 pots comprised 13 treatments in three replicates in a completely randomized design. Two types of seaweeds (Ulva sp.and Gelidium sp.) were dried in an oven at 60 0 C for 24 hr, and mixed with soil at different rates 0.1, 0.2, 0.3, and 0.4 ton fed-1 , before planting.). Soil samples were collected from all pots after harvesting, air dried and then sieve. Some physical, chemical analysis and available Zn, Pb, Mn and Cu were determined in the experiment soil. In this study, a program of observations and measurements was developed, concerning: morphological, productivity and root contents from heavy metals. The results of this study indicated that the values of soil bulk density decreased as a result of application seaweeds as compared with the control, while soil total porosity, available water, organic matter and available micronutrients increased due to the treatments used compared to the control. Also, plant dry weight yield values (roots and shoots) increased with of seaweeds treatments application, the treatments under investigation gave higher percentage values of micronutrients (content and uptake) in (roots) of red radish plants than shoots as compared to the control. Seaweeds play an important role in the chemical behavior of heavy metals in soil; decomposition of organic matter is followed by formation of active groups which have the ability to retain the metal in the complex and chelated form. The chemical behavior of the metal changed from cation to anion as well as the release of organic acids which slightly decrease the soil reaction (pH).

A field experiment was carried out during winter season of 2009-2010 firstly to evaluate the effect of some commercial products of humic acid in reducing mineral fertilizer rates, improving some soil properties (bulk density, total porosity, available water, mean weight diameter and soluble ions), plant growth and nutrients uptake by broad bean plant. secondly is trying to reduce the mineral fertilizer application for their dangerous on general health and highly cost of these fertilizer, with improving production of important crops by natural material. The commercial compounds (Leq humus, Hammer, Wesko plus K, K-Promote and Commander) were added to soil by a rate 10 kg fed -1 plus half the general recommendation. The results could be summarized as follows: -The values of soil bulk density decreased as a result of application humic products as compared with the control (mineral fertilization only). -Soil total porosity and values of available water increased due to the treatments used. -The values of mean weight diameter and soluble ions increased due to the treatments. -The values of soil organic matter and available micronutrients increased due to the treatments. -The plant dry matter yield values (straw and seeds) increased with of humic treatments application -The treatments under investigation gave higher percentage values of macro and micronutrients (content and uptake) in straw of broad bean plants as compared to the control.

The present work was carried out to assess the immobilization efficiency of some amendments induced some heavy metals in contaminated soil. Two types of amendments phosphate rock and bentonite were mixed with soil at different rates 1, 2, 4, 6 and 8 ton fed-1 , then incubated with soil samples at periods of 20, 30 and 60 days in three replicates, then seeded maize (Zea maize) after incubation of soil to monitoring reducing values of available heavy metals in plant and soil. The obtained data showed that:-Both applied phosphate rock and bentonite succeeded in reducing the availability of (Cu, Zn, Mn and Pb) as well as that phyto-availability to the grown plant of maize. Available heavy metal contents showed a tendency to decrease by increasing the applied amendment levels.-Lower values of available (Cu, Zn, Mn and Pb) could be obtained as a result of application of phosphate rock and bentonite at rates of 6 and 8 ton/fed., respectively, after 60 days of incubation.-The important role of phosphate rock and bentonite application for improving soil physical and chemical properties.-The previous beneficial effects of studied amendments were actually reflected on increasing the plants ability for improving the vegetative growth parameters, i.e., fresh weights and dry weights of shoots and roots yields, with similar parallel trends for the heavy metals immobilization in soil and uptake by plant organs (shoots and roots) .-Likewise, phytotoxicity of (Cu, Zn, Mn and Pb) alleviated rather easily by increasing the levels of phosphate rocks and bentonite at rates of 6 and 8 ton/ fed., respectively, after 60 days or incubation.