A simple rolling system was investigated and setting in the bottom of fertilizing unit to utilize the recommended amount of fertilizer adding to the seeds during/after planting. So that it can be used individually, to perform the fertilizing operation after planting, or combined with the drilling machine. The judging on the performances of fertilizer feeding unit with rolling system is identified under four different forward speeds (FS) of 2.5; 3.7; 5.0 and 8.5 km/h and different operating ratio between fertilizer unit landing wheel and rotating shaft of fertilizer rolling system (OR) under gate area (GA) of 15cm2. The granulated fertilizer (Potassium nitrate and Urea) were used in the experiment to assess the performance of the investigated rolling system on fertilizer application rate (kg/fedd.). The results of the study were compared statistically to obtain the most suitable treatments to the addition of activating doses of fertilizers during planting and growing crop service. The experimental results indicated that the recommended amount 12.0 kg/fedd potassium nitrate for the investigated rolling unit may be defined under forward speed of 5.0 km/h and a Operating ratio of "1.0 to 2.0". On the other hand, at recommended amount 30.0 kg/fedd or 33.0 kg/fedd potassium nitrate for the investigated fertilizer system may be conformed under forward speed of 3.7 km/h and with a operating ratio of "1.0 to 4.1" or "1.0 to 4.8" respectively.

This study was carried out in one of compost factories in Sadat city Menoufia, Governorate in 2011. Basically these studies aimed to identify engineering studies on agricultural residuals recycling. These agricultural residuals are: Fields wastes (shredded rice straw), Animals wastes (manure) and Food processing wastes, sugar cane factories wastes (press-mud). The composting was aerobic; the mechanical turning was done by turning machine which traced with tractor by the rear shaft PTO. Then temperature, moisture content, reducing ratio, composting period and final product were measured. From results found, the temperature reaches its maximum quickly when piles turning three times per week for all piles, the moisture content decrease with increasing the composting period and frequently turning, the reducing ratio decrease with decrease the composting period, the higher product was at the higher frequently turning and the composting period was decrease with increasing the frequently turning.

Egypt to study effect of drying on quality properties of onion using microwave and solar dryer at 2018. The experimental treatments included three different levels of microwave power (320, 480, and 640 Watt), three different onion slices thickness (2, 4, and 6 mm). Direct solar drying includes three different levels of onion thickness (2, 4 and 6 mm). The best treatment were found for microwave dryer was identified at treatment of 320W (2mm), where, (H°) value was 16°, considered the best method of drying onion because it was given the lowest value of total color change.

Aquaponic system is one of the modern systems that have been used to make the most of the water, in addition to integrating the agriculture of plants and fish together in one production system. It is an innovative, sustainable technology and environmentally friendly. The main objectives of this study are to evaluate the growth performance of Nile tilapia under the aquaponic system for a period of 42 days and to examine the effect of system type (aquaponic and hydroponic systems) and water flow rate of (0.5, 1.5 and 2.5 L/min) on the growth performance of lettuce plants grown in deep water culture technique (DWC) and nutrient film technique (NFT). The obtained results for fish indicated that fish weight, fish length and feed conversion ratio (FCR) were increased during the experimental periods. The results obtained for lettuce plants indicated that root length of the lettuce gradually increased with increasing water flow rates and growth period. the root growth rate was higher in aquaponic system than in hydroponic system. The nutrients consumption rate, water use efficiency and lettuce yield were increased with an increase in the water flow rate from 0.5 to 1.5 L/min and a decrease in the water flow rate from 1.5 to 2.5 L/min. The former parameters were higher in the hydroponic system than in the aquaponic system except for the rate of sodium consumption. The hydraulic loading rate was increased with increasing the water flow rate while the nutrient uptake time decreased with increasing the water flow rate.