An experiment was conducted to study the response of Maize to irrigation levels with or without potassium humate on yield and yield components of maize (Zea. mays L., cv. single cross) and soil properties after harvesting. Maize was sown at Giza Agricultural Research Station, Agriculture Research Center, Giza Egypt, during summer season of 2013. The experiment was arranging spilt plot design with three replications. The experiment involved two factors, potassium humate (0, 5, 10 and 15 kg fed -1 ) allotted to main plots and irrigation levels (100%, 75% and 50% of field capacity) allocated in sub plots. The results showed among irrigation levels treatments, W1 recorded the highest values of all studied traits of maize plants included plant height, shoot diameter (cm ), Length of Ear (cm), No. of rows ear -1 , weight of 100 grain (g), dry shoot (kg/ fed.), grain yield (kg/fed.) and biological yield (kg/fed.) and harvest index (HI%). Likewise, N, P, K, Fe, Mn and Zn content and its uptake showed the same trend. On the other hand, water stress resulted in a significant decrease in these parameters. Concerning water use efficiency, the highest values were achieved with irrigation level (W1) compared to the other irrigation levels (W2 and W3). Results also illustrated that plants received 15 kg fed.-1 potassium humate produced the highest values of the corresponding parameters than those in the control. In addition, plants received irrigation levels W2 or W3 combined with potassium humate registered the highest values of corresponding parameters compared to the irrigation without application potassium humate. Furthermore, potassium humate application were highly significant effect on improving soil characteristics, such as some available macro and micronutrients in soil, soil pH and EC, wet sieving stable aggregates and aggregation index, as compared to control treatment. The potassium humate at high level was superior on increasing abovementioned values. Potassium humate treatments under different irrigation levels were a more improving soil characteristics especially under W1 followed by W2 and W3 irrigation treatments. it can be concluded that irrigation level W1 and application of potassium humate with 15 kg fed -1 resulted in the highest yield and yield attributes, WUE and some soil properties. Also, application of potassium humate with deficiency in the amount of water irrigation led to gave the highest values of the former parameters compared to the transaction referred in the addition without.

This study was carried out at Al-Kanater Research Station, El-Kaluobia Governorate during the two successive seasons of 2012-2013 and 2013-2014, to investigate the effect of magnetized water on minimizing strawberry mineral fertilization. Four treatments were used i.e., tap water plus 100 % NPK (control), magnetized water plus 50 % NPK, magnetized water plus 75 % NPK and magnetized water plus 100 % NPK of the recommended mineral fertilization rates. Data were recorded on some vegetative growth characters, early and total fruit yield, some physical and chemical fruit quality parameters and macro and micro elements in leaves. Results indicated that irrigation with magnetized water plus 50% NPK of the recommended fertilization rate showed the highest values of total chlorophyll, total carbohydrates, early and total yield, fruit firmness, total soluble solids in fruits and water use efficiency as compared with control. Moreover, magnetized water plus 75% NPK of the recommended rate of mineral fertilization showed the highest values of NPK and manganese contents. In general ascorbic acid was decreased by using magnetized water. The study recommend using 50 % of the recommended NPK fertilization rates plus magnetized water to increase yield and quality of strawberry.

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The present work was conducted at El-Kanater Horticultural Research Station on Canino apricot trees during 2016 and 2017 growing seasons to study the effect of different irrigation regimes (irrigation at both 25 and 50 % of available soil moisture depletion) under mulching treatments; (black polyethylene plastic, white plastic and rice straw mulching) on evapotranspiration, water use efficiency, vegetative growth measurements, yield and fruit quality beside economic studies were also done. The most important results can be summarized as follows: Water consumption use (WCU) was increased in the case of frequent irrigation at 25 % of available soil moisture depletion (I 1) value which was found to be 4137.4 and 3206.9 m 3 /fed. in both growing seasons, respectively. Regarding mulching treatments, the values of the water consumption use were increased under both no mulching and rice straw mulching compared with either black plastic or white plastic mulching. Also, black plastic, white plastic and rice straw mulching generally led to increase (WUE) by 81.1 %, 55.6 % and 32.2 % over the un-mulched treatment, respectively in both seasons and Kc values as compared to unmulched treatments. Moreover, all investigated fruiting parameters (fruit set %, tree yield either as kg or as No. of fruits per tree, ton/fed and yield increment % as compared to the control) were significantly increased as a result of using mulching treatments in comparison with the control. It is quite clear that, leaf N, P and K contents were increased by using both black polyethylene plastic and white plastic mulching treatments in most cases as compared with control. Concerning the economic study, data indicated that, all mulching treatments were resulted in the higher values of profit per feddan as compared to the control treatment. Moreover the pest effective treatment in this respect was mulching with black plastic during both seasons of study. In general, it could be concluded that, both mulching treatments either with black polyethylene plastic or white plastic were most effective. shine (hour); S.R= solar radiation (cal/ cm 2 / day). RF = rainfall (mm / month).[Data were obtained from the agro meteorological Unit at SWERI, ARC] Water consumption use (WCU): Water consumption use or actual evapotranspiration (ETc) values were calculated for each irrigation treatment using the following formula (Israelson and Hansen, 1962). Where: WCU= seasonal water consumption use (cm). Θ2= soil moisture content after irrigation (on mass basis, %). Θ1= soil moisture content before irrigation (on mass basis, %). Bd= soil bulk density (g/cm 3). D= depth of soil layer (15cm each). i= number of soil layer.