: This study was carried out as pots experiment at greenhouse of Soil Science Department, Faculty of Agriculture, Menoufia University, Shebin Elkom, Egypt, during winter growing season of 2020/2021.  This study was done to study the effect of compost and sulphur compost as organic manures on the chemical properties and nutrients content of salt affected soil and its productivity of wheat plant (Triticum aestivum, Giza 12) as well as its content of some macro and micronutrients.

In this study, animal and plant residues composts mixed with elemental sulphur (S) at mixed rates of 0, 1, 2 and 3 % (CS0, CS1, CS2 and CS3) were prepared and at maturity time (60 days) analyzed for some chemical properties and their content of available macro and micronutrients.
The used four compost types were added to the salt affected soil at application rates of 0.0, 0.5, 1.0, and 2.0 %. Therefore, the experimental treatments were arranged within the experimental units in two way completely randomized design in four replicates.
Grains wheat (Triticum aestivum, Giza 12) were planted at 15 Novomber 2020, irrigated and fertilized according to recommendations of Egyptian Agriculture Ministry. After 150 days of planting (maturiry stage), the plants of each experimental unit were harvested above the soil surface. Then straw, grains and biological yields were recorded. Straw and grains content and uptake of N, P, K, S, Fe, Mn, Zn and Cu were determined.
At the same time at plant harvesting, soil sample was taken from each experimental unit and analyzed for its pH, EC, OM, exchangeable cations, ESP, CEC and the content of available N, P, K, S, Fe, Mn, Zn and Cu as well as its content of S forms (total, soluble, available and organic). All data were statically analyzed.
The obtained data may be sumerized as follows:
A. compost properties
 Compost pH was decreased with the increase mixed S, where its ranged from 7.52 in CS0 to 7.29 in CS3.
 Compost EC (dSm-1) was increased with the increase of mixed S, where its ranged between 1.86 dSm-1 in CS0 and 2.13 dSm-1 in CS3
 Total content (%) of N was increased with the increase of added S, where it's ranged between 1.20 % in CS0 and 1.70 % in CS3.
 Compost contents of OM and OC as well as C/N ratios were decreased with the increase of added S where their ranged between 43.15 %, 28.78 % and 23.93 in CS0 to 42.65 %, 27.17 % and 15.98 in CS3, respectively.
 With increase in mixed S with compost resulted in an increase of compost content of total P, K and S, where these contents ranged from 705, 2010 and 210 mgkg-1 in the compost untreated by S, to 813, 2185 and 2895 in compost treated by 3 % S, respectively.
 Increasing rate of added S to the compost resulted in an increase in the compost content of available Fe, Mn, Zn and Cu from 410, 499, 55.5 and 18.5 mgkg-1 in CS0 to 640, 585, 70.8 and 27.4 mgkg-1, respectively.
B. Soil chemical properties
 Increasing in both S mixed with compost and its application rate to the soil resulted in a significant decrease of soil pH .With CS0 treatment, soil pH was decreased from 8.81 with 0.5 % application rate to 8.70 with rate of 2 % recorded RC value of -1.69. Also, with  2 % added compost soil pH decreased from 8.65 with CS1 application to 8.52 with CS3 treatment.
 There are a significant decrease in soil ES as a result of compost application increase as well as its content of S therefore EC in the soil treated by CS0 were 6.27 and 6.05 dSm-1 at application rate of 0.5 and 2.0 %, respectively. Also at 2 % of added compost, soil EC were 5.80 and 5.50 dSm-1 with the treatments of CS1 and CS3, respectively.
 Soil content of OM increased significantly as a result from increase in both added rate of compost and its mixed rate of S. For example, the content of OM in the soil manured by 0.5 and 2.0 % of CS0 were 1.33 and 1.48 %, respectively. Also, these contents were 1.50 and 1.70 % in the soil treated by 2 % CS1 and CS3, respectively.