Two field experiments were preformed at the Experimental Farm of Sids Agricultural Reseasrch Station, ARC, Beni-Suef Governorate, Egypt to study the possibility of using feldspar as potassium source along with some bio-stimulants namely, silicate dissolving bacteria (SDB), humic acids and farmyard manure and its effect on cotton productivity and soil properties after harvest. The results indicate that added 400 kg feldspar/feddan, 10 kg humic acid or 10 m 3 FYM/feddan improved plant height, number of fruiting branches/plant, number of open bolls/plant, boll weight, seed cotton yield, earliness%, seed index and leaf chemical contents, i.e.; N, P and K%, chlorophyll A and/or B as well as soil available N and K. Feldspar increased the soil available N and K, while FYM or humic acid improved soil pH, O.M, soil available N, P and K. On the other hand, soil salinity was increased as FYM application. The results of the interaction between treatments show that the best results were found when cotton plants were treated with 400 kg feldspar/feddan + 10 m 3 FYM/feddan or 10 kg humic acid/feddan in combined with silicate dissolving bacteria. Furthermore, the effect of SDB on cotton productivity is more pronounced when combined with feldspar, FYM or humic acids

OOD TRAFFIC exhaust emissions are one of the most common sources of contaminants to soils and vegetation lies in the vicinity of highways. The main aim of this research is to investigate concentrations of Pb, Cd, Zn and Cu in soil at surface soil depth (0.0 -30) and subsurface soil depth (30 -60 cm) as affected by vehicle exhausts along the agricultural highway connecting Cairo -El-Minia City across Beba City, Beni-Suef Governorate, Egypt. In addition, revising the consequences on the staple wheat and maize roadside crops in terms of heavy metals presence in the edible parts for animals and humans. The results show that as the distance from the road decreased the concentration of Pb, Cd and Zn increased to 22, 45, 67, in soils and to 34, 56, 67 in plants, respectively. In general, the limits of heavy metals in wheat and maize plants were safe as stated by WHO (World Health Organization), except Cd (34) in leaves of wheat and maize grown adjacent the road. The pollution incidences, namely, transfer factor (TF), single pollution index (PI) and index of geo-accumulation (Igeo) were calculated and the results indicate that these indices decreased as the distance from the road increased especially in the western side rather than the eastern one. In this concern, this soil was moderately contaminated with Cd, while Pb, Zn and Cu were in the safety level.In conclusion, wheat and corn leaves contain cadmium near the danger limit, so it can be concluded that feeding animals should be prevented by plants grown near highways.

romatic plants are a sustainable supply of flavouring ingredients that apply to the food, fragrance, and medicinal industries. To determine the effects of compost manure fertilization (2, 4, and 6 tons/ha) along with spraying of methyl jasmonate (20 and 30 ppm) and potassium silicate (1000 and 2000 ppm) on the vegetative growth and chemical components of sweet basil (Ocimum basilicum L.) plants, a field experiment was conducted at the Experimental Farm of El-Quassassin Horticultural Research Station, Ismailia Governorate, for two succeeding seasons (2021 and 2022).Four replications of a split-plot design with three treatments of compost manure fertilization in the main plot and three treatments of stimulants in the sub plot. The data collected showed that the foliar treatments of 2000 ppm K-silicate combined with 6.0 tons of compost manure per hectare of sweet basil plants produced themost significant levels of these traits. However, the highest values for plant height were from the application of 6 tons/ha of compost manure combined with 30 ppm of methyl jasmonate. The lowest values, in contrast, resulted from 2.0 tons of compost per hectare across both growing seasons under no stimulant conditions.

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The current study was conducted to evaluate the effect of different sources levels of potassium fertilizer on the performance of cotton plants under the drought stress. Particularly cotton water applied efficiency, chemical and pigments content, vegetative growth, and yield characteristics were evaluated and compared among different sources levels of potassiumtreated and non-treated drought-stressed plants to test the potential of this fertilizer as a tool for alleviating drought stress.

The present work was aimed to investigate using of potassium fertilizer as well as nano chitosan -NPK to alleviate the negative effect of water stress and its effect on cotton plant and some water relations. Two field experiments were conducted to study the possibility of using potassium fertilizer and nano chitosan -NPK to eliminate the negative impacts of water stress. The design of the experiment was split design plot, where number of irrigation treatments (6 and 9) were arranged in main plots, while potassium fertilization, i.e., K 1 = 96 kg K/ha as potassium sulphate, K 2 = 96 kg K/ha + twice foliar application of 2% potassium sulphate, K 3 = 96 kg K/ha + twice foliar application with 2% nano chitosan-NPK, K 4 = four times of foliar application with 2% potassium sulphate, and K 5 = four times of foliar application with 2% nano chitosan-NPK. The results obtained indicated that K 3 followed by K 2 which achieved the favourable values of plant height, first fruiting node, number of fruiting branches/plant, number of open bolls/plant, boll weight, seed index, lint percentage, seed cotton yield. Neither potassium fertilization nor irrigation number altered fiber properties. The data of the interaction showed the combined 96 kg K/ha as potassium sulphate + twice foliar application with 2% nano chitosan-NPK can diminish the negative effect of drought stress under deficit conditions, with higher seed cotton yield nearly equal to those obtained under full irrigation. It could be concluded that potassium fertilization and nano chitosan-NPK can improve cotton plant tolerance to water stress and enhance cotton productivity.

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