eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
565
569
10.21608/jssae.2017.38098
38098
Original Article
Effect of Potassium Humate on some Metabolic Products of Wheat Plants Grown under Saline Conditions.
Hanaa Salem
1
Yossria Abo-Setta
2
M. Aiad
3
Hebat-Allah Hussein
4
Rasha El-Awady
5
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Soils, Water and Environment Res. Instit. A. R. C.
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Soils, Water and Environment Res. Instit. A. R. C.
A lysimeter experiment was carried out at Agricultural Research Station, Sakha, Kafr El-Sheikh governorate, during the growth season of 2013/2014 to study the effectiveness of potassium humate on improving the tolerance of wheat plants to saline conditions and its effect on some metabolic products. Irrigation of wheat plants with diluted sea water i.e. EC 6, 9 and 12 dS/m decreased chlorophyll a, chlorophyll b & carotenoids contents and total protein contents but increased total carbohydrate and proline contents. Soil addition of potassium humate at (4 & 8 kg/feddan) increased the metabolic products of wheat plants under unsalinized conditions; the low rate of potassium humate gave better increments than the higher one. Additionally, this material ameliorated the depressive effect of salinity on wheat plants.
https://jssae.journals.ekb.eg/article_38098_0d8a435f4a562755261603150e29fdb4.pdf
wheat plants - salinity
potassium humate
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
571
576
10.21608/jssae.2017.38092
38092
Original Article
Nitrate Accumulation and Oxalate Formation in Spinach Plants (Spinacia oleracea, L.) as Affected by Nitrogen Fertilization levels and Iron Foliar Application.
Fatma Ghaly
1
G. Baddour
2
Hind El-Azazy
3
Soils Dept., Fac. of Agriculture, Damietta Univ., Egypt.
Plant Nutrition Dept., Soil, Water and Enviro. Res, Inst., Agric. Res. Center.
Plant Nutrition Dept., Soil, Water and Enviro. Res, Inst., Agric. Res. Center.
Two field experiments were organized at the Tag Elez Station Experimental Farm; Governorate of Dakahlya, during the two successive winter seasons of 2014-2015 and 2015-2016 using spinach plant (Spinacia oleracea, L. cv. "Balady"). Spinach seeds were sown on 2nd and 6th of December, seasons 2014 and 2015, respectively. Ten treatments were arranged in split plot design with 3 replicates to evaluate the combination effect of five levels of N-fertilizer {50, 75, 100, 125 and 150 %} from the recommended dose (RD) by the Ministry of Agric. and Soil Recl. (MASR) in the form of NH4 NO3 (33.5% N) as soil application in the presence and absence of Fe as foliar way FeSo4 (20%Fe) was used as a source of Fe at the rate of 300 ppm Fe. The obtained results indicated that: * A nitrogen fertilizer application at the rates of this survey significantly increased the average values of dry weigh, chlorophyll contents, N, P, K, Fe and VC in the leaves of spinach plant tell the rate of 100% RD. increasing the rate of N-fertilizer from 100% to 150% RD significantly decreased the mean values of all the aforementioned traits during both seasons of the experimentation. At any level of N-fertilization; foliar applied of Fe has been recorded a pronounced high effects on the average values of all parameters under the current study. * Increasing the rate of N-fertilization from 50 to 150%RD sharply and significantly increased the average value of nitrate and nitrite accumulation in spinach leaves, while such effect significantly decreased the activity of nitrate reductase enzyme in spinach plant. Moreover, foliar application of Fe in combination with any rate of N-fertilizer has been corrected this trend. * A favorable effect on oxalate formation in spinach leaves due to an addition of iron in foliar way combined with any level of N-fertilization as compared to the plants treated with the same levels of nitrogen in single form.
https://jssae.journals.ekb.eg/article_38092_700db7dfd1296f25ba863a0f27fd9270.pdf
NH4 NO3
nitrite
nitrate
oxalate
iron
Spinach
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
577
582
10.21608/jssae.2017.38100
38100
Original Article
Effect of Potassium Humate and Potassium Silicate on Growth and Productivity of Wheat Plants Grown under Saline Conditions.
Hanaa Salem
1
Yossria Abo-Setta
2
M. Aiad
3
Hebat-Allah Hussein
4
Rasha El-Awady
5
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Soils, Water and Environment Res. Instit. A. R. C.
Bot. and Micro. Dept., Fac. of Sci. (Girls Branch) Al-Azhar Univ.
Soils, Water and Environment Res. Instit. A. R. C.
A lysimeter experiment was carried out at Sakha Agricultural Research Station, Kafr El-Sheikh governorate, during the growth season of 2013-2014 to investigate the effect of potassium humate, potassium silicate and/or their interaction on improving growth parameters and yield components of wheat plants grown under salinity stress. Irrigation of wheat plants with diluted sea water i.e. EC 6, 9 and 12 dS/m reduced growth parameters and yield components, these reductions were gradually increased with increasing the concentrations of diluted sea water. Addition of potassium humate at (4 & 8 kg/fed.) to soil and foliar application of potassium silicate at (500 & 1000 ppm) alone or together increased growth parameters and yield components of wheat plants grown under salinity stress, the duality treatments of potassium humate and potassium silicate were the most effective treatments especially at low concentration in amelioration the depressive effect of salinity on growth and yield of wheat plants.
https://jssae.journals.ekb.eg/article_38100_5f176fe96e4db578ec4dd7087486d2b2.pdf
Wheat
salinity
potassium humate
potassium silicate
Growth – Productivity
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
583
586
10.21608/jssae.2017.38093
38093
Original Article
Energy Requirements for Combine Machine to Strip Tillage and Planting
M. Abo-Habaga
1
Kh. Khadr
2
M. Ghazy
3
H. Helal
4
Agric. Eng. Dept., Fac. of Agric. Mansoura Univ. Egypt.
Agric. Eng. Ins., El-Dokki, Giza., Egypt.
Agric. Eng. Dept., Fac. of Agric. Mansoura Univ. Egypt.
Agric. Eng. Ins., El-Dokki, Giza., Egypt.
Field experiments were carried out at "Elbasatin station "Sabahia site, Alexandria Governorate, in area of about five feddans with using a local manufacture combined implement for strip tillage and at same time corn. The corn variety of (Giza 125) that planting, during the summer season of 2016-2017. The results of this study indicated that the energy requirements for combined implement without rotary units increased from 19.882 to 40.813 mJ.feddan-1 by increasing the plowing depth from 17 cm to 22 cm, respectively. Whereas the energy requirements for combine machine with rotary unit increased from 32.375 to 47.668 mJ.feddan-1 with increasing the operating speed from0.44 0.94 m.s-1 and increased from 36.45 to 62.307 mJ.feddan-1 as the operating speed increased from 0.44 0.94 m.s-1 and increasing from56.889 to 66.157 mJ.feddan-1 during increasing the plowing depth from 17 cm to 22 cm, respectively.
https://jssae.journals.ekb.eg/article_38093_c461de918367804c8df60be3f2cba1e0.pdf
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
587
592
10.21608/jssae.2017.38193
38193
Original Article
Alleviation of Soil Compaction Effect by using Rice Straw under Different Moisture Contents
S. Abdeen
sayed_abdrahman@yahoo.com
1
Soils and Water Department, Faculty of Agriculture, Al-Azhar Univ., Cairo, Egypt
Soil compaction considered a problem that affects several soil properties and plant growth parameters. In order to assess the effects of soil compaction (expressed as bulk density) under different levels of moisture content and rice straw on some soil properties, plant growth parameters and macro nutrients uptake by sorghum plant (Sorghum bicolor (L.) Moench, Dorado sp.) To achieve this purpose, a columns experiment was conducted at the farm of Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt during the summer season of 2017. Plastic columns (Cylindrical PVC pots) of 15 cm inside diameter and 45 cm depth were used. The treatments of experiment consisted of three soil compactions leading to the following bulk densities: 1.35; 1.50 and 1.65 Mg m-3, two moisture content 75 and 100% of field capacity (FC), and three rates of rice straw(RS) < 2 mm were application to soil :0.0,0.5 and 1%. The results obtained that there is a great potential in managing the soil by the addition of rice acompaction for the development and growth of sorghum plant.Generally, pH decreased with increasing soil compaction under the studied levels of moisture content and rice straw. But EC values increased significantly with increasing bulk density as indicator as soil compaction. Rice straw improving soil EC values at 100% FC as a result of decreasing bulk density. Increasing rice straw in soil has the potential to improve soil hydraulic properties. Length, fresh and dry weights of shoot and root are influenced by bulk density and rice straw as well as moisture availability. At the lowest soil compaction (1.35 Mg m-3), all parameters of sorghum plant increased with increasing moisture content. While, the highest level of moisture content (100% FC) gave the opposite effect at the others levels of bulk density (1.5 and 1.65 Mg m-3). Generally, the favorable condition for plant growth has request low bulk density, and good hydraulic conductivity. Also, the concentration of N, P and K decreased significantly with increasing soil compaction. It can be noticed that N content increased significantly with increasing rice straw (RS) at 75% moisture content of field capacity, then decreased at 100% at the highest levels of soil compaction (1.65 Mg m-3). P and K content increased with increasing rice straw and moisture content as a result of decreasing soil compaction. Also, uptake of N, P and K increased significantly with increasing rice straw and moisture content especially, at the low level of soil compaction.
https://jssae.journals.ekb.eg/article_38193_3a500698c51c56aaa456d444390d7456.pdf
Soil compaction
moisture content
rice straw
sorghum plant
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
593
603
10.21608/jssae.2017.38089
38089
Original Article
Interactive Effect of Nitrogen Fertilizer Forms, Irrigation Intervals and Soil Conditioners on Maize Productivity Grown on Clay Loam Soil.
S. Abdou
dr_samehabdou2004@yahoo.com
1
Azza Ahmed
2
M. Bayoumi
3
Soils, Water and Environment Research Institute (SWERI), Agricultural Research Center, Giza, 12112, Egypt
Soils, Water and Environment Research Institute (SWERI), Agricultural Research Center, Giza, 12112, Egypt
Soils, Water and Environment Research Institute (SWERI), Agricultural Research Center, Giza, 12112, Egypt
Maize is the third important cereal crop in Egypt after wheat and rice. Injection of ammonia gas as a nitrogen fertilizer is used widely comparable with other nitrogen fertilizer forms due to the high nitrogen content (82 %) as well as its cheapest price. Two field trials were carried out at Tameia Agricultural Research Station, Fayoum Governorate, Egypt during 2014 and 2015 summer seasons to study the effect of nitrogen fertilization forms (ammonia gas 82 N% and ammonium nitrate 33.5N%), irrigation intervals and soil conditioners on yield, yield components and water use efficiency (WUE) water use efficiency of maize. Results showed that a combination of ammonia gas, irrigation at 10 days interval and application of compost caused the lowest averages of dry soil bulk density and hydraulic conductivity, whereas, this interaction also recorded the highest value of grain yield in both seasons, as well as, higher values of concentration and uptake of N, P and K in grain. On the other hand, the treatment of ammonia gas, irrigation at 15 days and application of compost remarkably had the higher water use efficiency (WUE) than the irrigation at 10 days with the application of compost. Although, the yield production reduced by 5 to 6 % , it saves irrigation water 400m3ha-1 water. Hence, the treatment of irrigation at 15 days and application of compost is recommended for adoption in wider areas in Egypt to save irrigation water.
https://jssae.journals.ekb.eg/article_38089_7db85198a15576b5b68c0b149bd3094b.pdf
Maize
ammonia gas. ammonium nitrate
soil conditioners
water consumptive use
water use efficiency
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
605
612
10.21608/jssae.2017.38095
38095
Original Article
Impact of Some Soil Amendments Application on Soil Properties, Fodder Beet Productivity and Quality under Salt Affected Soil
Wafaa Hafez
wafaa.hafez28@yahoo.com
1
Zeinab Abd El-Naby
zeina.bree@gmail.com
2
Walaa Mousa
3
Hend Hassan
4
Environment Res. Sec., Soil, Water and Environment Res. Inst. Agric. Res. Center, Giza, Egypt
Forage Crops Res. Sec., Field Crop Res. Inst., Agric. Res. Center, Giza, Egypt
Forage Crops Res. Sec., Field Crop Res. Inst., Agric. Res. Center, Giza, Egypt
Forage Crops Res. Sec., Field Crop Res. Inst., Agric. Res. Center, Giza, Egypt
A field experiment was in Sahl El-Tina site, North Sinai Governorate, during the two successive seasons (2015/16 and 2016/17) to study the of applying some soil amendments (sulphur (S) (0.5 Mg fed-1), gypsum (G) (2 Mg fed-1), compost (C) (5 Mg fed-1) and their combinations, (S+G), (G+C), (S+C) and (S + G and C), comparing with control) in salt affected soil on soil properties, forage yield and quality of fodder beet variety, A randomized complete block design with three replications was applied.Application of soil amendments weresignificantly edsoil EC values in case of the first and second growing seasons. Whereas, the soil pH was significantly decreased by applying all amendments compared to control. The concentrations of N, P and K in fodder plants illustrate a relative increase by decreasing soil salinity as a result of was adding different amendments.The results showed that soil amendment application increased top and root fresh yield, dry matter yield, crude protein content, root length and diameter, while values of Nutrient Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) Generally fodder beet top had higher contents of crude protein, crude fiber and ash than roots and the reverse was true for organic matter and nitrogen free extract contents. The percentage of Total Digestive Nutrients percentage (TDN), Relative Feeding Value (RFV) and Relative Forage Quality (RFQ) overall the studied treatments had a prime performance as a superior intake.
https://jssae.journals.ekb.eg/article_38095_b85640ee4e6dadb956a43d031b42ce75.pdf
Fodder beet (Beta vulgaris)
Salt affected soils
soil amendment
yield
Quality
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
613
620
10.21608/jssae.2017.38088
38088
Original Article
Environmental Impact for Applications of Neem Cake Coated Urea and Nano Iron Foliar on Rationalization of Chemical Nitrogen Fertilizers and Wheat Yield
Shreen Ahmed
1
A. Fahmy
2
Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt
Agriculture Genetic Engineering Research Institute, Agricultural Research Center, Giza, Egypt
Slow release fertilizer has become a new trend for saving chemical fertilizer consumption and to minimize environmental pollution. This study was aimed to use neem cake as a natural material for coating urea for improving fertilizer efficiency and reduce N-losses. Also to investigate the application of neem cake coated urea with or without foliar nano iron on wheat productivity. Neem cake coated urea and nano iron were prepared. Two experiments (incubation and field) were carried out. Incubation experiment was conducted using soil samples to study the efficiency of the use neem cake coated urea on NH4+ release under conditions of saturated and field capacity for nine weeks. A field experiments was carried out to study the effect of neem coated urea with or without nano iron as foliar spray on N-use efficiency, wheat yield, components and nitrate leaching. The results of incubation experiment showed that, the release of NH4+ was thehighest under saturated conditions as compared with field capacity. The release of NH4+ from neem coated urea was slow for a long period of time compared to uncoated urea. The data of the field experiment showed that the application of neem coated urea fertilizers led to a lower concentration of nitrate in drainage water. A highest increase in the grain yield of wheat was recorded by application of neem coated urea fertilizers with foliar nano iron compared to uncoated urea as a control. Results illustrated that controlled released urea fertilizer improved yield by 24% and enhanced N uptake up to 77% as compared to uncoated urea as control treatment. Applied of neem coated urea and nano iron foliar has increased nitrogen uptake and recovery efficiency of wheat. From the results obtained, it could be concluded that, the possibility of using neem coated urea as well as foliar spraying with nano iron for rationalize the use of nitrogen chemical fertilizers, thereby reducing the pollution as well as reducing the costs of agricultural production.
https://jssae.journals.ekb.eg/article_38088_068ffe5339b26b0e97d7ce1d3d35f826.pdf
Neem coated urea
nano iron
Nitrogen use efficiency
nitrate leaching
Wheat
and yield
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
621
625
10.21608/jssae.2017.38190
38190
Original Article
Using GIS And Satellite Image To Determine The Administrative Limits, Area And Sites Of Rice Straw
Rasha Ahmed
1
S. Ali
2
M. Baiomy
3
E. Khater
4
Agric. and Bio. Eng. System Dept., Fac. of Agric., Moshtohor, Banha University.
Agric. and Bio. Eng. System Dept., Fac. of Agric., Moshtohor, Banha University.
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Dokki – Giza - Egypt
Agric. Eng. Res. Inst. "AEnRI", Agric. Res. Center, Dokki – Giza - Egypt
In the present study, rice straw was selected as the main crop residues that cause environmental problems in Egypt. Geographic information systems and satellite image as represent new technologies that contributed in solving these problems. Dakahleia is one of the Famous governorates for cultivating rice crop with around rice crop area of 350661 Fadden. Sinbilawin is the biggest center in Dakahleia governorate for planting rice which represents about 13.5 % in rice production from total production in Dakahleia area. For the previous reasons Dakahleia and Sinbilawin were selected for this study. From Google Earth -The administrative limits of Dakahlia governorate is locating at El-Shrqia governorate east, El-Gharbia governorate west, the Mediterranean Sea north and El-Qaliopia governorate south. It is lies between 31° 29' 28.75" E longitude and 31° 4' 59.53" N latitude. Snplawein is bounded to the east by the Timai El-Amded city, west by the Aga city, north by the Mansoura city and to the south by the Diarb Negm city. It located between 31° 27' 38.07" E longitude and 30° 53' 1.55" N latitude. The ENVI program has been used to separate layers as road, urban, canal, and place it in a file which named (shp file). The results from satellite image, ENVI and ArcGIS programs for Sinbilawin center were appeared 97 villages on the Sinbilawin map, total area of rice was 34078.12 fed. and total rice straw was 59350.457 ton. Also, From ArcGIS program different layers were determined as layer of roads, canal, drainages, urban, layer of areas, and layer of sides.
https://jssae.journals.ekb.eg/article_38190_3639ffd7114f5e6b92da3c0fdd21295d.pdf
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
627
634
10.21608/jssae.2017.38195
38195
Original Article
Assessment of Spatial Variability of some Alluvial Soil Properties in Egypt
Yousif I.
ibraheemyousif@agr.cu.edu.eg
1
Soil Science Department, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt
Soil spatial variation is very valuable in deciding the suitable cropping system and appropriate agricultural management of lands. This research paper was done to measure the spatial variation of some soil characteristics, in the western farm of Faculty of Agriculture, Cairo University, Giza province, Egypt. Soils of studied area were classified as Typic Torrifluvents. 100 samples of soil were gathered at depth of 35 cm during 2016. Sampling designee was done by a grid systematic sampling system, using GPS. Samples of soil were gathered at spacing of 30*30 m2. Some soil characteristics including EC, pH, CaCO3, Organic matter (OM), Particle density (Pd), Bulk density (Bd) and Porosity (P) were determined in laboratory. Descriptive statistical analyze were achieved to describe soil properties. Geostatistical procedures of semivariograms and krigingcoupled with a GIS were utilized to interpret the variability ad mapping of spatial distribution of soil characteristics. The coefficient of variation displayed that the chemical properties the soil were more fickle than the physical properties. Electrical conductivity was the most variable characteristic. Results explained that EC and pH had the maximum and the minimum spatial correlation respectively.
https://jssae.journals.ekb.eg/article_38195_eab8956b10a9ba36c3ef4a73377349b0.pdf
spatial variability
geostatistics
soil properties
Egypt
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
635
642
10.21608/jssae.2017.38094
38094
Original Article
Impact of Plant Density and Humic Acid Application on Yield, Yield Components and Nutrient Uptakes of Sunflower (Helianthus annuus L.) Grown in a Newly Reclaimed Soil
S. Emam
1
A. Awad
2
Agronomy Dept., Fac., of Agric., Fayoum Univ.
Soils & Natural Res., Dept., Fac. of Agric.&Natural Res., Aswan Univ.
A study was carried out as field experiments at Demo experimental station, Fayoum district in summer seasons 2015 and 2016 to investigate the effects of plant density and humic acid soil application on oil content, nutrient uptakes, vegetative growth and yield of sunflower (Helianthus annuus L.) plants. A split plot layout within a randomized completely blocks design with 3 replications were used. Three treatments of plant density i.e., D1=47,619 plant/ha-1 (0.7x0.3 m), D2=71,428 plant/ha-1 (0.7x0.2 m) and D3= 95,238 plant/ha-1 (0.7x0.15 m) were placed in the main plots. The subplot treatments were 5 levels (0.0, 1.25, 2.5, 3.75 and 5 kg ha-1) of humic acid. The results indicated that the plant density D1 gave the highest values of plant height, number of leaves plant-1, leaf, stem and head dry weights plant-1 and seed yield plant-1. However, the plant density D2 recorded the highest seed yield ha-1. Both plant densities (D1) and (D2) surpassed D3 concerning on values of leaf and seed (N, P, K, Mg, Mn, Zn and Fe) uptakes. Soil addition of humic acid at rate of 5 kg ha-1 significantly produced the highest values of growth parameters, yield, its components as well as oil content and nutrient uptakes in both seasons. The highest sunflower seed yield was obtained when plant density was 71.428 plant ha-1 (D2) and treated with 5 kg ha-1 of humic acid as a soil application.
https://jssae.journals.ekb.eg/article_38094_e1a9ec56691d20ee0ec2346e30674855.pdf
Sunflower
plant density
Humic acid
eng
Mansoura University, Faculty of Agriculture
Journal of Soil Sciences and Agricultural Engineering
2090-3685
2090-3766
2017-11-01
8
11
643
648
10.21608/jssae.2017.38191
38191
Original Article
Influence of Mineral Fertilization Rate and Foliar Application of Yeast and Ascorbic Acid on Yield, Vegetative Growth and Fruits Quality of Eggplant.
K. Fouda
1
A. Abd-Elhamied
ahmedsalah@du.edu.eg
2
Soil Sci. Dept., Fac. of Agric., Mansoura Univ., Egypt.
Soil Sci. Dept., Fac. of Agric., Damietta Univ., Egypt.
The experiments were carried in clay soil at the Experimental Farm of Faculty of Agricultural, El-Mansoura University, Egypt, to investigate the effect of foliar application with yeast and ascorbic acid on plant growth, yield and quality of eggplant (Solanum melongena L.) under different levels of NPK fertilization. Vegetative growth measurements (plant height, No. of leaves/plant, No. of branches/plant, fresh and dry weight), yield (fruits length, fruit diameter, No. of fruits and total yield), N, P, K and chlorophyll content as well as quality of fruits (C.protien, T.carbohydraties, D.faiber, V.C and V.A) were recorded to study the effects. As for, parameters of eggplant as affected by application of NPK fertilization there were a significantly increase with increasing rate of NPK from 50 up to 100% of the recommended dose then decreased with 150% NPK. The highest significant values of the aforementioned parameters were recorded with spraying plants by yeast extract (5 g/L.) comparing with the untreated plants. It could be observed that eggplants supplied with 100% NPK fertilization and foliar application of yeast gave the highest significant values of parameters under study.
https://jssae.journals.ekb.eg/article_38191_afb734830cc424e98796cf04bf973544.pdf