ABSTRACT
                Two field experiments were conducted at the Experimental Farm Station of El-Serw, Damietta Governorate, A. R. C. Egypt during 2016/2017 and 2017/2018  seasons. The aim was to study the effect of soil amendments different rates i.e. (compost, gypsum and humic acid) different rates (2, 4 and 6 ton fed^-1) for compost and gypsum, while the rate of humic acid was (20, 40 and 60 kg fed^-1) on Egyptian clover (Trifolium alexanderinum L.,) productivity and itseconomic evaluation. The experiments were laid out in a complete randomized block design with three replicates.  The results could be summarized as follows:-
-Soil amendments improved some agronomic characters i.e. plant height, dry leaves/stem ratio , no. of heads m^-2and 1000-seed and humic acid at a rate of 60 kg humic acid fed^-1+ recommended NPK recorded the highest values for these characters in combined.
-Crude protein, digestible crude protein percentages were increased by adding soil amendments for soil salinity and at the same time crude fiber % was behaved opposie.
- Mean values of Egyptian clover yields fed^-1(fresh, dry, seed and straw) were increased by adding soil amendments and humic acid at a rate of 60 kg fed^-1 + recommended NPK recorded the highest values for these traits.
- Compost, gypsum and humic acid increased macro and micro elements % of Egyptian clover plants compared with untreated treatments and humic acid at a rate of   60 kg fed^-1 + recommended NPK  recorded the highest values for macro and micro elements.
-The best treatment T₁₀ (60 kg humic acid fed^-1+ recommended NPK) which realize the highest value for B/C (1.36).