A pot experiment was conducted outdoor at the Experimental Farm, Faculty of Agriculture, Mansoura University during the summer seasons of 2015 and 2016.to evaluate the positive interaction effects among different types of organic fertilization forms and levels alongside with bio fertilizer applications on quantitative and qualitative yield characteristics of cucumber grown under an organic farming conditions.. Thirty treatments were arranged in a split-split plot design with three replicates, which were the simple combination of three types of organic amendments (compost, FYM, and biochar), two rates of soil application (5 and 10 ton fed -1 ) and five types of bio fertilizer application forms i.e. (1) microbien + phosphorien, (2) microbien + phosphorien+ effective microorganisms (EM), (3) EM, (4) poultry manure extract, and (5) control (without biofertilizetion). Compost proved its effectiveness in improving yield characteristics, nutrients content and quality indices as compared with other organic amendments. The application level of 10 ton fed -1 was the optimum rate for providing sufficient needs of plant during its whole growth stage. The combined biofertilization treatment (microbien + phosphosien+ EM) was the most effective treatment for improving quantitative and qualitative yield characteristics. The obtained results concluded that the integrated treatment of compost application at 10 ton fed -1 alongside with microbien + phosphosien+ EM biofertilization is recommended to produce the highest productivity and quality indices of cucumber yield grown on a sandy soil condition.

The objective of this study is to investigate the influence of compost, nitrogen and micronutrient compounds fertilization on N-uptake, yield and yield components of wheat. A field experiment was carried out at Met-Dafer; Dekernes, Dakahliagovernerate, Egypt during the two successive winter seasons of 2008/2009 and 2009/2010. The experiment was conducted in a split split plot design; which consisted of three compost treatments (0, 5 and 10 ton fed-1) as main plots, nitrogen fertilization levels (0, 50 and 75 kg N fed-1) as sub plots and four treatments of micronutrient compounds (control, sitrin , sitrin + kotingin and kotingin) as sub sub plots. The obtained results indicated that compost and micronutrient compounds fertilization with nitrogen fertilization increased N-uptake, yield and yield components of wheat and 10 ton fed-1 compost treatment was the superior and the micronutrient compounds treatments excelled control and the sitrin + kotingin treatment was top treatment. The combination of compost and micronutrients along with nitrogen application improved yield, yield components and N-uptake. The best treatment was sitrin + kotingin at 50 kg N fed-1 with adding compost10 ton fed-1 .

Previous research showed that applying fertilizer phosphorus (P) to the soil in concentrated subsurface bands increased P availability to crops compared to a surface application. Early growth responses of corn (Zea mays L.) plants were measured after 28 days of growth in pots in a greenhouse for single band, two single bands, injection, and surface fertilizer P placement methods. Fertilizer P was applied at the rates of 0, 12, and 24 mg P/kg soil for each method for three different soils. Shoot dry matter weight and nitrogen (N) and P uptake increased for all placement methods regardless of initial soil test P level. However, growth parameters were greater for the banded and injection methods. Response parameters were minimally influenced by the surface P application, but some fertilizer P from the surface application leached through small desiccation cracks after daily additions of water. This probably increased P availability slightly. Shoot dry matter production efficiency and shoot N/P ratio were higher for the surface P placement method and for the unfertilized P treatments. Overall growth responses to fertilizer P rates were less effective in soils with higher initial soil test P levels.

Two field experiments (tomato and squash) in rotation were conducted at Sakha Agricultural Research Station Farm, Kafr El-Sheikh Governorate, Egypt during the summer and the autumn seasons of 2008 and 2009 to evaluate the effects of some multinutrient fertilizers for long term cultivation under two irrigation systems on crop yield and soil quality. The experiments were carried out under wire proof green house conditions. Tomato (Lycopersicon esculentum L) seedlings under the local name of Alessa was planted . Two irrigation systems and nine fertilizer treatments were examined . Split plot design was used with four replicates. The main plots were assigned by two irrigation systems (surface furrow irrigation, and drip irrigation). The sub plots were randomly assigned by nine fertilizer treatments of :-1-control (without fertilization), 2-recommended dose of N and P (200 kg N and 13.08 kg P fed -1 ), 3recommended dose of P and K (13.08 kg P and 41.5 kg K fed .-1 ), 4-recommended dose of N and K, 5-multinutrients 20 -20 -20 +1% Mg + micro nutrients, 6multinutrient 20 -20 -20 + 1% Mg, 7-multinutrient 20 -20 -20 NPK as compound fertilizer (200 kg fed .-1 ), 8-commercial multinutrient 20 -20 -20 NPK as mixed fertilizer and 9-recommended dose of N. P and K (as urea, superphosphat and potassium sulphate). Squash was transplanted on the same design without fertilization depending on the previous fertilizer residuals. The obtained results can be summarized as :-surface irrigation gave higher tomato fruit yield of 32178.3 kg fed -1 , the highest dry fruit weight of 2413.37 kg fed -1 , higher P %, P content of the fruits (0.257% and6.2 kg fed -1 ) respectively, higher values of K % in the shoot and fruits ( 0.9 and 2.7%) , NUE, PUE, KUE and the highest squash fruit yield of 10202.67 kg fed -1 . Drip irrigation produced the highest N % in the shoot and fruits of 0.602 and 0.912 % respectively. Surface irrigation generally decreased available N, K in the soil after squash while available P was increased compared to the values before planting. The highest tomato fruit yield of 31105.2 kg fed -1 , N% in tomato shoot of 0.677%, NUE155.5, PUE 814.0 and KUE 622.1 were obtained with T5.

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