الفهرس 
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Abstract
Soils and water agro-management techniques play an important role and good effect on growing crops for high profit.Thus, optimizing the water application by scheduling crops irrigation increases water use efficiency and improve the growth, yield of the grown crops in addition to water rationalization. The aim of this work to study the effect of irrigation scheduling, soil mulching and soil organic and inorganic conditionersapplication rates on some physical and chemical propertiesof calcareous soil and their reflection on soybean crop production and crop water relations. A field experiment was conducted at MenshatRabie Village, Itsa District, Fyoum Governorate, Egypt. The used soil is alluvial clay calcareous soil with slightly to moderately saline and it is not alkaline. Calcium carbonate content at different soil fractions has been decreased according to the ascending order; fine sand > clay > silt > coarse sand. Three irrigation scheduling treatments were applied i.e., I1 (1.0 of cumulative pan evaporation, C.P.E.), I2 (0.8 of C.P.E.) and I3 (0.6 of C.P.E.). Two soil mulching treatments were applied, i.e., without soil mulching and black plastic mulching. The effects of two soil conditioners namely poultry manure and agriculture sulfur were also tested.Three levels of each soil conditioner (½, 1.0 and 1½ of recommended dose), i.e., 7.5, 15, and 22.5 m3 fed-1 of poultry manure and 75, 150 and 225 kg fed-1 of agriculture sulfur.The experiment included 36 treatments distributes in a split split design with three replicates.Soybean (Glycine max. Giza 111 variety) was grown along two successive seasons (2014 and 2015). The obtained results showed that the applied treatments (irrigation, mulching and soil conditioners) resulted in significant and considerable effects on the studied soil properties such as, decreases each of soil bulk density, soil salinity and soil pH. The applied treatments led to increases in each of total porosity, void ratio, water holding pores, useful pores, hydraulic conductivity and organic matter content values.These results have positively reflected upon the growth and productivity of soybean crop. Such effects were varied among the used treatments to large extent and magnitudes. Additionally, the used applied treatments had considerable significant effects on the studied crop water relations i.e., improved water consumptive use and increased the water use efficiency. Such findings reduced the hazard effects of calcareous soiland its salinity on soybean growth. It was concluded that application of irrigation scheduling treatment 0.8 of C.P.E. with the use of poultry manure at the rate 22.5 m3 fed-1 under mulching with black plastic were superior and producing high seeds yield of soybean (1344 kg fed-1)and high water use efficiency (0.555 kg m-3) than all other studied treatments. Also, these treatments could be save about 20% (about 500 m3) of water requirements of soybean crop grown on a clay calcareous soil.