eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-07-01
8
7
323
329
10.21608/jssae.2017.37516
37516
Original Article
Production of Compost Tea from Farm Wastes
A. Matouk
1
Y. EL-Hadidi
2
A. Tharwat
3
Samar Khafagy
4
Agric. Eng. Dept, Faculty of Agric , Mansoura University.
Agric. Eng. Dept, Faculty of Agric , Mansoura University.
Agric. Eng. Dept, Faculty of Agric , Mansoura University.
Agric. Eng. Dept, Faculty of Agric , Damietta University.
The aims of this study were to design and manufacture an innovative unit for producing compost tea, and optimizing some operating parameters affecting the performance of the manufactured unit such as flow rate , temperature, aeration , pH ,nutrient additives and fermentation period . Also, to optimize the fermentation and quality of the produced. The selected factors are: extraction temperature (30°C, 40°C, 50°C and 60°C), water flow rate (270 , 300, 330 and 540 l/h ), aeration time (6, 12,18, and 24 h with an aeration rate of 0.18 m³/h ) , nutrient addition (25,50,75 and 100 ml) and pH (6 and 6.5) of produced compost tea. The result has shown that the temperature has significant role to play in producing high quality of compost tea. pH is the other factor which may contribute poor in quality of compost tea to the results. Power and specific energy are more sensitive to different factors such as extraction temperature, aeration time and fermentation period. The results showed that the values obtained for the extraction efficiency were 98.3%, the production rate was 2.2 l /h and the energy consumed was 5.74 kWh / l and the cost of the extraction process per liter was 1.72 L.E, at 60 ° C and the flow rate of hot water was 270 l /h and aeration time of 24 hours at 0.18 m3 / h and an nutrients additives rate of 50 mL at pH 6.5 for 24 hours fermentation period.
https://jssae.journals.ekb.eg/article_37516_2072efab3ea91f2cebc0bb0c7227fc15.pdf
compost
compost tea
non-aerated method
aerated method
Taguchi Method
Microbial population
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-07-01
8
7
331
339
10.21608/jssae.2017.37528
37528
Original Article
Effect of Windbreaks and some Design Factors on Performance of Sprinkler Irrigation System
A. Awwad
1
A. Mohammed
2
Res. Agric. Eng. Res. Inst. A. R. C. Egypt.
Res. Agric. Eng. Res. Inst. A. R. C. Egypt.
A field experiment was carried out during the successive growth season of 2015/2016 in order to study the effect of windbreaks and some factors of design on the performance of sprinkler irrigation system under open field conditions in sandy soil at Arab El- Awammer Research, Station, Agriculture Research Center- Assiut Governorate, Egypt. The objective of this work is to study the effect of presence or absence the windbreaks, height of rotating sprinkler, climatic conditions (temperature, wind speed and relative humidity) and layout of sprinkler irrigation on the spray evaporation loss, the actual water application, coefficient of uniformity (CU), distribution uniformity (DU), production yield and water use efficiency for sprinkler irrigation systems. The results indicated that; The lowest value of Spray evaporation loss (SEL) was 2.9% in Sep with height of rotating sprinkler (50cm) and the highest value of SEL was 9.6% in August with height of rotating sprinkler (70cm) with the presence of windbreaks. While with the absence of windbreaks, the lowest value of SEL was 10% in Sep with height of rotating sprinkler (50cm) and the highest value of SEL was 28.7% in August with height of rotating sprinkler (70cm). The wind speed increased by an average ratio 38%, the air temperature increased by an average ratio 15% and relative humidity decreased by an average ratio 40% at the windbreaks were completely absent. The highest coefficient uniformity and distribution uniformity were obtained in June, while the lowest coefficient uniformity and distribution uniformity were obtained in August during the presence of windbreaks. The presence of windbreaks increased the productivity of the crop more than the absence of windbreaks, with the same height of rotating sprinkler and the same layout, the maximum Pods yield and the highest percentage of water use efficiency by interaction between presence of windbreaks and the low height of rotating sprinkler (50cm). While, the lowest Pods yield and water use efficiency were produced due to interaction between the absence of windbreaks and the increasing height of rotating sprinkler to 70cm.
https://jssae.journals.ekb.eg/article_37528_a6231dd1bc86bb9f5186a3b8121b860a.pdf
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-07-01
8
7
341
346
10.21608/jssae.2017.37527
37527
Original Article
Impact of Nitrogen and Organic Fertilization on Nutrients Uptake by Lettuce Plants
A. Taha
1
M. El-Shazly
2
Nadia Ali
3
Soil Sciences Department, Faculty of Agriculture, Mansoura University.
Soils, Water and Environment Research Institute, Agricultural Research Center, Giza.
Soils, Water and Environment Research Institute, Agricultural Research Center, Giza.
During the winter season of 2013/2014, a pot trial was done at the nursery of Experimental Station Farm in Faculty of Agriculture, University of Mansoura to investigate the impact of soil types, organic fertilizers, N-levels and their interaction on growth and nutrients concentration and uptake by lettuce (Lactuca sativa L.). The trial was done in factorial trial in complete randomized block design with 3 replications. Where, the first factor integrated with the two types of soil (clay and sandy soils). The second factor incorporated with two organic fertilizers (farmyard manure "20 m3/fed" and compost "15 m3/fed"). The third factor integrated with three levels of nitrogen fertilizer (without nitrogen fertilization, 50 and 100 % of the recommended dose). The obtained results could be summarized as the following:The greatest means of height of plant, plant fresh and dry weights, N, P and K percentages and its uptake by lettuce leaves were recorded when planting seedlings of lettuce in clay soil. Lettuce plants that organic fertilizing by compost (15 m3/fed) produced the maximum values of plant height, plant fresh and dry weights, N, P and K percentages and its uptake by lettuce leaves. Increasing N- level to 60 kg N/fed (100 % of the recommended dose) gave the uppermost values of height of plant, plant fresh and dry weights, N, P and K percentages and its uptake by lettuce leaves. It can be concluded that planting lettuce seedlings in clay soil and organic fertilizing plants with compost (15 m3/fed) and 60 kg N/fed to maximizing its growth and nutrients concentration and also uptake under conditions of this study.
https://jssae.journals.ekb.eg/article_37527_5da792a764923ca5c365566610328220.pdf
lettuce
soil types
farmyard manure
FYM
compost
organic fertilizers
nitrogen levels
Growth
nutrients uptake
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-07-01
8
7
347
353
10.21608/jssae.2017.37530
37530
Original Article
Influence of Knives Wear Phenomena on Hammer Mill Productivity and Product Quality
N. Ismail
1
O. Fouda
2
M. Ahmad
3
M. Mosa
4
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Doki – Giza - Egypt
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Doki – Giza - Egypt
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Doki – Giza - Egypt
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Doki – Giza - Egypt
This research aimed to determine the change of cutting knives decision depending on knife wear phenomena, anditseffect on hammer mill productivity and product quality. It can be done by tracing the knives wear stages and determine its safe time range to replace the knives. The experiments were done in El-Serw village Damietta Governorate from 2014 to 2016, by grinding both of corn ear and dough as popular agricultural productive using the traditional hammer mill. The studied variables also are four concaves hole diameters (2.5, 4.0, 8.0 and 12.0 mm), five operating hours of new knife, 150, 200, 250 and 300 h for corn ear. While, for dough, are used two concaves hole diameters (2.5 and 4.0 mm) and operating hours of new knife, 200, 400, 600 and 800 h. The measurement includes specifications of knives, product quality and hammer mill performance. The research recommended that the hammer mill knives must replacement after 220 operating hours to grind corn ear and 600 operating hours to grind dough which represents the safe limit time to keep product quantity and quality in accepted state.
https://jssae.journals.ekb.eg/article_37530_dde95ad1742283665f71f8edba4890e0.pdf
hammer mill
knives wearing
productivity
Dough
corn ear
element of knife
Quality
energy
MWD
PSD