الفهرس 
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Abstract
ENGLISH SUMMARY : It is known that integrated fertilization possess an economical effect on crops and awareness of the role of nutrients in higher plants nutrition can prompt optimize fertilization approaches for higher returns. Therefore, the objective of this study is to evaluate the influence of some nutrients i.e., boron, iron, selenium, copper, titanium, cobalt, nickel, molybdenum and vanadium on the performance of wheat plants grown on alluvial and sandy soils through two pots trials (the first was exploratory experiment continued two weeks only, while the second experiment continued until the end of wheat plant life) because of the importance of wheat as a strategic crop in Egypt as well as assess elements application methods and find out the best-added rate of these beneficial elements. - First experiment (continuing was until 2 weeks only from sowing). Pots experiment was carried out to assess the effect of some beneficial elements as main factor i.e., B, Fe, Se, Cu, Ti, Co, Ni, Mo, V at different rates (0.0, 2.5, 5.0 and 10.0 mg L-1) as sub main factor on the performance of wheat plants grown on alluvial and sandy soils after two weeks only from sowing as exploratory experiment. - Second experiment (continuing was until harvest stage). Pots experiment was carried out to assess the effect of some beneficial elements as main factor i.e., Co, Ni, Fe , Mo and B with different application methods as sub main factor (foliar application and soil addition) at different rates (0.0, 2.5, 5.0 and 10.0 mg L-1) as sub-sub main factor on the performance of wheat plants grown on alluvial and sandy soils. The results obtained could be summarized as follows : Regarding first experiment : 1. The highest values of fresh and dry weights (g plant-1) and contents of N, P, K in straw (%) of wheat plants grown on alluvial soil and sandy soil at period of 14 days from sowing were recorded when plants were treated with Ni element as soil addition at rate of 10 mg L-1. 2. With the studied beneficial elements i.e., Ni, Mo, Cu, Co and Fe, the values of all aforementioned traits significantly increased as the added rate of these beneficial elements increased. 3. With the studied beneficial elements i.e., Ti, V, Se, B, the values of all studied traits for plants received these elements significantly increased with increasing added rate from 0.0 mg L-1 to 2.5 and 5.0 mg L-1 and then significantly decrease at rate of 10.0 mg L-1 and this may be due to appearing the toxicity of Ti, V, Se and B. In other words, it can be noticed that Ti, V, Se and B elements are beneficial at low concentrations but they have a toxic influence at high concentrations. Regarding second experiment. 1. The superior beneficial element was Ni compared to other studied elements, while Mo came in the second-order followed by Co then Fe and lately B. 2- All studied elements, except B, caused improve plant performance which was enhanced as the added rate of these elements increased (either with foliar or soil additions). 3- Regarding plants received B either with foliar or soil additions, the values of all studied traits significantly increased with increasing B rate from 0.0 mg L-1 to 2.5 and 5.0 mg L-1 and then significantly decrease at 10.0 mg L-1 due to appearing B toxicity. 4- Foliar application method was most effective than soil addition method. 5- Performance of plants grown on alluvial soil was better than that of plants grown on sandy soil. CONCLUSION : Findings of the current paper and those obtained by others are enough to confirm that all studied elements are beneficial for wheat plants at all studied rates except B, Se Ti and V at rate of 10 mg L-1. Beneficial elements application as foliar spraying on plants was most effective than their application as soil addition. Nickel may be possess a vital role in non-biological N2 fixation with wheat plants grown on alluvial or sandy soil, where it can fix atmospheric N2 either on straw or soil surface. B, Se Ti and V applications to wheat plants at a low concentration (2.5 and 5.0 mg L-1) are beneficial, but their toxicity start to appear at high rate (10 mg L-1). Generally, it can be concluded that the nickel element may have a hidden role in atmospheric N fixation more than other studied nutrients and this is reflected on plant growth and there is a need for other research in future to confirm this.