Field experiments were carried out during 2016/ 2017 and 2017/2018 growing winter seasons using sandy soil under drip irrigation system, at Ali Mubark Experimental Farm, South Tahrir Region, Egypt. The experimental layout was carried out to provide complete randomized blocks in a split-plot design. The objective of this study to investigate the effect of application of foliar ammonium molybdate in combination with inoculation with biological fertilizers: Mycorrhiza (Glomus sp.) and Rhizobium (Rhizobium leguminosarum) on the growth performance and productivity of Faba bean (Vicia faba L.) plant grown in sandy soil under drip irrigation. The main treatments included foliar application of ammonium molybdate (+Mo) and without ammonium molybdate (-Mo) at rates of 5mg Mo /l and 0 mg Mo/l, respectively. The sub main treatments included four treatments (i) biological fertilizer Mycorrhiza, (ii) Rhizobia, (iii) Mix between the two biofertilizers and (iv) without biofertilizers inoculation. The obtained results indicated that treatment with Mo recorded high values of all parameters as compared to without Mo. Application of biofertilizer improved all growth characters, available of N, P, K, O.M. and soil respiration. The most effective treatment was obtained by the mixed RIZB/MYCO treatment followed by RIZB for N, K and by MYCO for P, O.M. and soil respiration. The upper soil layer (0-30 cm) contained high values of available N or P, O.M and soil respiration while available P increased in the lower layer (30-60 cm). Macro elements (N, P, K) contents in leaves and grains showed high response to addition of ammonium molybdate with the mixed RIZB/MYCO treatments followed by RIZB for N and protein, also MYCO for K and P content. Vegetative growth characters and yield components of Faba bean plant showed high response to the mixed RIZB/MYCO treatment followed by MYCO treatment. The results showed that Myco infection had enhanced with MYCO treatment while Nitrogenase activity was enhanced with RIZB treatment for Faba bean plant grown under sandy soil and drip irrigation conditions.

An experiment was conducted during two seasons 2018/2019 and 2019/2020, cultivated with soybean, at farm Ismailia Governorate, Egypt. The aim of this study was to evaluate the effect of two treatments (potassium humate and compost tea) at different rates of (0, 2, 4 and 6 ml/L water) with two application methods (soaking and foliar application) on soil fertility and soybean productivity. In both seasons, each experiment was carried out in randomized complete blocks design with four replicates. Data showed that the lowest value of soil pH 7.87 was obtained in the soil treated with foliar application of compost tea at 6 ml/L compared with other treatments. Also, the used of potassium Humate and compost tea foliar application was significant decrease of soil salinity (EC dSm-1), while soaking method was no significant for decrease soil salinity. The different rates of all treatments soaking method to soil gave significant increase of N and P available contents in soil while the foliar application was no significant. As well as, the K available in soil treated with all rates of treatments led to significant increase for soaking. The highest mean values of Fe, Mn and Zn contents in soil treated were with foliar application of compost tea. Compost tea soaking and foliar application increased soybean productivity. The highest values of all growth parameters plants i.e. (plant height (cm), No. of leaves/plant, No. of pods/plant, pods weight (g)/plant, seeds yield (ton/ha) and weight of 100 seed (g) were treated with potassium humate foliar application than all treatments.

The field experiment was carried out at the south-west portion of Shall El-Tina region, north Siena Governorate Egypt. The study investigated evaluations of different nitrogen fertilizers sources (ammonium nitrate, ammonium sulphate and urea fertilizers) and rates (100%, 75% and 50% recommended dose of all different nitrogen forms) alone or combined with bio-fertilizer (Rhizobium radiobacter sp.) strain on improve nutrients available and contents in cowpea productivity in newly reclaimed saline soil conditions during two summer seasons 2019 and 2020. The studies treatments were disturbed among the experimental plots in split design. The obtained results showed that using ammonium sulphate fertilizer was more effect on EC, pH, and available N, P, K, Fe, Mn and Zn values by increasing application rates compared with other treatments. Moreover, data recorded the applied ammonium sulphate75% with bio-fertilizer was increase of plant height, weight of 100 seeds, weight of pods (g plant-1), seeds yield (ton fed-1) have been affected by inoculation with bio-fertilizer combined with different nitrogen forms and different application rates than other treatments. The highest values of N, P, K, Fe, Mn and Zn concentrations and uptake in seeds were obtained with ammonium sulphate application combined with bio-fertilizer compared with other treatments. The increase of chlorophyll, protein contents in cowpea plants with decreasing soil salinity, while the increase of proline content was increasing soil salinity. The application of ammonium sulphate at application rate 75% N combined with bio-fertilizer improves soil properties and cowpea productivity under saline soil conditions.

Two field experiments were carried out in a newly reclaimed sandy soil under sprinkler irrigation system at El Ismailia Agricultural Research Station, El Ismailia Governorate, Egypt during the winter seasons of 2017/2018 and 2018/2019, to study the effect of organic amendment (compost and FYM) under different rates of nitrogen fertilizer (control, 75 and 100 % of recommended dose) on the fertility of study soil and wheat productivity. The treatments were arranged in a split-plot design with three replicates. Results indicated that 100% of recommended dose followed by 75% significantly increased all determined traits relative to control under the study conditions. Soil application of compost and FYM was superior for all growth characteristics, grain quality, and yield of wheat plants compared to control (without applications). The effect of compost or FYM combined with different rates of nitrogen mineral fertilizer increased plant height (cm), weight of 1000 grains (g), Straw yield (Mg acre -1 ), and weight of grains yield (Mg acre -1 ). The application of soil amendments increased N, P, and K concentrations in straw and grains. Application of organic amendments had a positive significant effect on available N, P, and K in soil. The interaction between soil amendments and different rates of nitrogen mineral fertilizer showed a significant effect on yield and its attributes, grain protein content, and total carbohydrate. Finally, it could be concluded that the application of farmyard manure with 75 % nitrogen of recommended dose improved the soil properties of sandy soil and increased the productivity of wheat plants.