Two field experiments were conducted at El-Qantra Shark, Ismalia Governorate, Egypt in two successive winter seasons of 2011/2012 and 2012/2013. It aimed to study the effect of compost or humic acid at different rates separately applied or combined with sulphur on sme soil properties and its content of available nutrients and faba bean(Vicia faba cv) Varity Nobaria 1 productivity as well as the seeds content of macro-micronutrients , protein and proline under saline soil conditions. The compost application was at the rates 0, 4, 8, 12 Mg fed-1 was done 25 day before planting. The application of humic acid was at the rates 0,10, 15 and 20 kg fed-1. The sulphure was applied at rate 400 kg before 25 days from sowing. Results obtained showed that, the soil pH decreased with increasing the rate of humic acid and compost. The soil salinity EC (dSm-1) was not significantly affected by the different rates of humic acid and compost applied alone or combined with sulphur. The application of humic acid or compost at high rates combined with sulphur gave the highest soil available N, P , K, Fe, Mn and Zn values after faba bean harvesting in both seasons. Also, the faba bean pods yield and seed yields (Mg fed-1) tends to increase due to the application of humic acid (20 kg fed-1) alone or combined with sulphur than the untreated in both seasons. On the other hand, raising the compost levels, applied alone or combined with sulphur, led to increase the seeds yield (Mg fed-1), weight of 100 seeds (g) and No. of pod plant-1 , compared to control. The effect of applied different rates from humic acid and compost on N content in seeds was not significant in both seasons, while the increase was significant in P, K, Fe, Mn and Zn content in seeds faba bean in both seasons. The effects of sulphur and organic on protein content in seeds of faba bean plant were significantly in both seasons. The prolien content in faba bean plant was significantly decreased in first season, while it was significantly decreased due to humic and compost application in both seasons. Compost application significantly affected on total chlorophyll content. The sulphur application with humic or compost indicated significant increase in total chlorophyll. From the previous results, it can be concluded that the use of humic acid at the rate of 15 kg fed-1 combined with sulfur or average 8 tons per fed of compost combined with sulfur to give the economical grain yield where there is not significant differences between the rates of 15 kg humic acid and 20 kg per fed, as well as compost 8 tons and 12 tons under saline soil.

Phosphorus (P) is the second important key plant nutrient after nitrogen. An adequate supply of P is therefore required for proper functioning and various metabolisms of plants. Majority of P in soils is fixed and hence, plant available P is scarcely available despite the abundance of both inorganic and organic P forms in soils.A group of soil microorganisms capable of transforming insoluble P into soluble and plant accessible forms across different genera, collectively called phosphate-solubilizing bacteria (PSB), have been found as best ecofriendly option for providing inexpensive P to plants. These organisms in addition to supplying soluble P to plants also facilitate the growth of plants by several other mechanisms, for instance, improving the uptake of nutrients and stimulating the production of some phytohormones. Two field experiments were conducted at EL-Gemmiza, Agric. Res. Station, (30º ‫׳74‬ ‫״5.22‬ N, 31° ‫׳70‬ ‫״43‬ E, elev. 10 m), Agric. Res. Centre., El-Gharbia Governorate, Egypt, during the two successive summer seasons of 2017 and 2018, to study the effect of different application sources and rates of phosphorus on the growth, productivity, yield characters and quality of soybean (Glycine max L.), c.v. Giza 111. The treatments consisted of four sources of phosphorus [single super phosphate (SSP), rock phosphate (RP), single super phosphate (SSP) + phosphate solubilizing bacteria (PSB) and rock phosphate (RP) + phosphate solubilizing bacteria (PSB)] at three levels of added P.i.e (0, 15 and 22.5 kg P 2 O 5 fed -1 ).Results revealed that seed and straw yield and uptake of N, P and K increased significantly with both sources of P over control. Application of single superphosphate proved superior increases compared to rock phosphate in respect of yield and uptake of nutrients. There was a significant increase in yield and uptake of nutrients with increase in P application rate from 15 kg P 2 O 5 fed -1 to 22.5 kg P 2 O 5 fed -1 applied either as SSP or RP. Protein content in soybean seed increased significantly with both the sources of P. The application of SSP +PSB (T 9 ) recorded higher yield (grain and straw) and uptake of nutrients than phosphorus alone. The maximum seed (1572 kg/fed) and straw (4473.33 kg/fed) yields were recorded with 22.5 kg P 2 O 5 fed -1 as SSP+PSB. Significant differences among the treatments were noticed with respect to number of pods per plant, seed yield per plant, test weight and seed yield. Application of 22.5 kg P 2 O 5 fed -1 with PSB (T 9 ) produced maximum number of pods/plant (150.67), seed yield (74.23 g/plant) and hundred seed weight (18.77 g/plant) as SSP and the lowest was in the control. Regarding evaluation of phosphorus use efficiency had more pronounced effects on combined application of SSP+PSB followed by RP+ PSB. Quality parameters viz., oil content, oil yield and crude protein content differ markedly among different treatments with the application of levels of phosphorus and bio-fertilizer.

Two field experiments were carried out at Ali Moubark Agric., Res. Station during two successive seasons 2007/2008and 2008/2009 on potato cv. Diamant to study the vegetative growth characters, tuber quality, tuber minerals content and total tuber yield as affected by the application methods of K-fertilizer (soil application, foliar application and soil + foliar application, either single and /or in combination with foliar application of zinc or manganese or boron) three times during plant growth i.e. at 45, 60 and 75 DAP.Almost all the parameters of the potato plants which received 50% soil application K-fertilizer + 50% foliar application significantly increased as compared with other application methods.On the other hand, most vegetative growth parameters were significantly increased by foliar spraying of potato plants with micronutrients and led to improve the tuber quality parameters i.e. all carbohydrate fractions, the protein of tuber, the tuber weight and total tuber yield as compared with the control.In general, application of K-fertilizer as 50% of the recommended rate used as soil application + 50 % of that added as foliar application in combination with foliar spray of micronutrients recorded maximum values of plant growth parameters, improved tuber quality characters and obtained highest tuber yield/fed. Therefore, this treatment could be recommended for raising potato yield and improving tuber quality and reducing the productive cost under similar conditions.

Two field experiments were conducted during the two successive seasons of 2013 and 2014 at El-Gemmeiza Research Station (30º ‫׳74‬ ‫״5.22‬ N, 31° ‫׳70‬ ‫״43‬ E, elev. 10 m), Agriculture Research Center, El-Gharbia Governorate, Egypt to study the effect of integrated fertilization of N-mineral and organic fertilizer combined with bio fertilizer (including the genera Azotobacter and Azospirillium) on sunflower (c.v. Sakha 53) seed yield and quality. The experiment was laid out in a randomized complete block design with three replicates. The experimental treatments comprised partial substitution of the recommended mineral N (MNRec.) rate (30kgN/fed.) with organic N fertilizer (ONF) as compost combined with bio fertilizer. Results revealed that application of T 4 (50%MNRec. +25% ONF +Bio) significantly improved yield, as well as yield attributes and protein and oil yields as compared to 100%ONF(T 8 ) or 100%MN(T 1 ) only .The integrated MN with ONF(25-50%ONF)always gave higher values than those obtained with full N rate as mineral or organic only. However, maximum seed oil percentage was recorded, when crop was fertilized by T 6 (100%ONF+Bio) followed by T 5 (25%MNRec. +75% ONF) while maximum seed oil yield was recorded by T 2 (50% MN Rec. +50% ONF) followed by T 4 (50%MN Rec. +25% ONF +Bio). According to the results of this experiment, unsaturated fatty acids, mainly linoleic and oleic acids raised in response to the integrated fertilization system while the saturated fatty acid (palmitic and stearic acid) were reduced. High percentages of oleic acids (50.17%) and linoleic acid (45.29%) were observed in T 4 and T 9 . So, bio-organic fertilizer could be considered as a suitable substitute (25-50%) for mineral nitrogen fertilizer in agricultural systems.

, to study the effect of different methods addition of humic acid on soil fertility and faba bean (Sakha 3) productivity. The experiment includes two methods of application (soil application at rates of 5 and 10 kg humic /fed) and foliar application at rates of (1 g and 2g humic /L water) alone or combined with mineral nitrogen fertilizer at rates of (0, 10, 20 and 30 kg N/fed) as ammonium nitrate (33.5 %N). The obtained results indicated that the effect of addition humic acid methods (soil application or foliar application) significantly increased growth character i.e. plant height (cm), No. of branch /plant, No. of pods/plant, weight of pods /plant (g) and weight of seed/plant (g) in both seasons. As well as, the methods used of humic acid (soil application or foliar application) at different rates had a significant effect on of seed yield (ton/fed), pods yield (ton/fed) and weight of 100 seeds (g) and chlorophyll, respectively, while the protein content was no significant in both seasons. Concerning the effect of humic acid application on N, P and K concentration in seeds were increased with increasing rates of humic 10 kg /fed and mineral N fertilizer 30 kg N/fed. The interaction between humic acid methods system application and different rates of mineral N were significantly increase for Fe in both seasons but no significant for Mn and Zn concentration in seeds faba bean plants. Also, the soil application of humic acid with 10 kg/fed and foliar application at a rate of 2g humic acid /L with 30 kg N led to highest available N, P and K content in soil after faba bean harvest compared with other treatments. On the other hand, the interaction between methods of humic acid application and different rates of mineral N fertilizer on Fe was significant in the first season and Mn in both seasons, while Zn was no significant in both seasons. It can be concluded that soil application of humic acid at rate 10 kg humic /fed and foliar application at rate 2g/L water had a favorable effect on yield and yield component and improve chemical constituents of faba bean and sandy soil.