الفهرس 
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Abstract
The objectives of this work are to investigate the:1-Effect of multinutrient fertilizers as a balance fertilizer on tomato and pepper yields compared to the common single fertilizers. 2-Effect of the residual effect of fertilizers on the crop rotation yield and soil health.3-Effect of multinutrients and the single fertilizers on the soil fertility after the crops rotation.4-Effect of the irrigation methods on the crop yields.5-Effect of the irrigation methods on fertilizer efficiency.6-Effect of the irrigation methods and common single and multinutrient fertilizers on the soil health. Four field experiments were conducted at Sakha Agricultural Research Station Farm, Kafr El-Sheikh Governorate, Egypt during summer and winter seasons of 2008 and 2009 (tomato and squash) in rotation and (pepper and cabbage) in rotation to study effect of cultivation under different irrigation systems and different fertilization treatments on crops yield and soil quality. The experiments were carried out under wire proof green house conditions. 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), 3- recommended 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, 6- multinutrient 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). The obtained results can be summarized as 1- Surface irrigation gave higher tomato fruit yield and drip irrigation gave higher pepper fruit yield. 2- T5 of fertilization treatment (multinutrients 20 –20 –20+1% Mg + micronutrients(200 kg fed.-1) gave the highest tomato, pepper and cabbage fruit yield . 3-All the fertilization treatments increased soil EC, but the higher EC values were recorded under the drip irrigation compared with the surface irrigation.