Two field experiments were conducted on Gadila village, Mansoura city, Dakahlia Governorate during the two successive summer seasons of 2017 and 2018 as sake of studying the impact of some methods of potassium humate (KH) application along with nine mixtures of NP fertilizers on soybean plants . split plot design was used where KH application methods and NP mixtures were put in the main and sub plots, respectively. Addition of KH generally had enhancing impacts on soybean growth , seed and stalk yields as well as improved seed nutritive and biochemical contents. Foliar spraying of KH achieved the maximum values followed by seed coating and control in a descending order. Soil application of (100 % N + 100 % P) mixture attained the best results for all aforementioned characteristics with no significant difference between it and (75 % N + 100 % P) mixture. Foliar spraying of soybean plants with 2% KH solution (10% K2O) in a volume of 200 L fed -1 at 30 and 45 days after sowing and soil application of (75 % N + 100 % P) of the recommended doses, in a dual treatment achieved the superior impacts and recorded the highest values of plant growth criteria, productivity as well as improved seed quality characteristics and saved 25 % of N requirement for soybean plants.

Two field experiments were conducted at a private farm on Gadila Village, Mansoura City , Dakahlia Governorate , Egypt under alluvial soils of Nile delta, during 2017 and 2018 summer growing seasons as sake of studying the effect of potassium humate (KH) sprayed singly or in dual,triple and quadruple combinations (9 mixtures) with some micronutrients(Fe , Mn and Zn )on leaves photosynthetic pigments ; yield and yield attributes as well as nutritive and biochemical contents of sesame seeds. KH and micronutrients were sprayed; once , at 21 days after sowing (DAS) ; twice, at 21 and 35 DAS and triple, at 21 , 35 and 50 DAS. So ,a split plot arrangement with three replications was used , where number of foliar spraying times for both KH and micronutrients were allocated in the main plots however , nine treatments of different combinations of KH and micronutrients were randomly distributed in the subplots . The highest values for all traits mentioned before were attained upon foliar spraying of sesame plants, triple compared to those sprayed twice and once, respectively. Spraying KH and micronutrients simultaneously in a quadruple combination i.e.( KH + Fe + Zn + Mn )also gave the best values followed by their additions in triple ,dual combinations however, spraying of KH alone achieved the least values . Therefore , spraying sesame plants with( KH + Fe +Zn +Mn )three times achieved the highest increments for all criteria under investigation related to the quantity and quality of sesame .

Soils of Egypt characterize with raising pH values, CaCO 3 content, clay and Fe & Al oxides. These factors contribute, to a large extent, in P-fixation in soil and its transformation into unavailable forms. This reflect, in turn, on plant growth and the resultant crop. So, the main target of this investigation is raising the use efficiency of P-fertilization, decreasing P-fixation, increasing its availability in soil and promoting its uptake by plant through testing new methods for P-application compared with the traditional one (P-application before sowing). Therefore, two field experiments were designed in sandy soils during the two winter seasons 2002/2003 and 2003/2004 at South Tahrir Res. Station, Ali Moubark village, El-Bustan region, Behira governorate under drip irrigation system. For the two experiments, P was applied as soil or seed coating. Soil application treatments were added at a rate of 30 kg P 2 O 5 /fed., once before sowing, twice: before sowing and during the vegetative growth stages or in three portions, before sowing and during the vegetative and flowering growth stages. In seed coating method, seed were coated before sowing with P at rates of 0.1, 0.2 and 0.3 kg P 2 O 5 /kg seed. Data obtained revealed that the treatments of P-soil application generally surpassed the P-seed coating ones. In this respect, P-soil application in three portions (at sowing and during the vegetative and flowering growth stages) gave the highest increments in seed, straw and seed protein yields as well as macro-and micronutrients contents in both seed and straw compared with the traditional method of soil P-application. Moreover, seed coated with 0.2 kg P 2 O 5 /kg seeds attained the highest increases in all abovementioned yield components and nutritive contents among the treatments of seed coating method, whereas, coating of seeds with 0.3 kg P 2 O 5 /kg seeds caused the least ones. Therefore, it can be concluded that the addition of P to sandy soil at a rate of 30 kg P 2 O 5 /fed., in three portions, i.e. at sowing and during the vegetative and flowering growth stages reduce Pfixation by soil factors, increase its availability, promote its uptake by plant, achieve the highest productivity of faba bean seed, straw and seed protein yields and improve the nutritive contents of both seeds and straw.

Two field experiments were performed at a private farm on the town of EL-Serw, Al-Zarqa region, Domiate Governorate, Egypt (Latitude 31 o 12 \ N; Longitude 31 o 37 \ E) during the spring seasons of 2017 and 2018 on March 1 st for the two seasons. The main targets of these experiments were to raise the productivity of squash fruits as well as improve its nutritive content and quality characteristics. Split plot design with three replicates was used where K-treatments i.e 0, 62.5 and 125 Kg K2O fed-1 were allotted to the main plots however, sub plots were comprised of different foliar spraying treatments of Mn namely 0, 0.3 and 0.6 g L-1. Data obtained revealed the following important topics : 1-K-soil application and foliar spraying of Mn had synergistic impacts on squash vegetative growth characteristics, yield and yield components as well as nutritive content and quality characteristics of squash fruits, except crude fiber and total phenol. Differences between either K levels or Mn ones for all abovementioned parameters were significant and treatments of K2 and Mn2 achieved the highest values. 2-Additional positive effects were observed when the addition of K and Mn simultaneously. In this concern, the best values were recorded at the treatment of K2×Mn2 for all the investigated parameters. In brief, the productivity of squash fruits as well as their nutritive content and quality characteristics can be improved through K-soil application and foliar spraying of Mn at levels of 125 kg K2O fed-1 and 0.6 g Mn L-1 , respectively in a dual treatment.