Ten well established mature seedling trees (22 years old) of guava cv. Montakab El-Sabahia CV., grown at the Baramoon experimental farm, horticulture research institute Dakahlia governorate, Egypt were used in present study during two seasons 2016-2017. Half of the selected trees were sprayed with Ethephon at 600 ppm applied in February of each year. The other half was left as a control without spraying. The semi-hard wood cuttings were taken in May and July. Immediately after collection, all cuttings were soaked for 3 hours in activated charcoal (AC) 15%. The experiment was laid out in complete randomized blocks design. The total number of treatments amounted to 9 treatments. IBA at 3000, 4500, 5000 ppm, Ethephon at 600ppm, Benzoic acid at 100ppm and Citric acid at 100ppm. The more favorable results were obtained in the first collecting date (May), and among the treatments, T5 (Ethephon 600ppm + Benzoic acid 100ppm + IBA 4500ppm T5) recorded the best results in percentage of rooted cuttings 70%, number of roots per cutting 4.3, length of roots 4.32 cm, root fresh weight per cutting 3.35g and survival percentage of rooted cuttings 50%.

A field experiment with three replications was conducted on sprinkler irrigated sandy soil during two successive summer and winter seasons (summer 2021 and winter 2021/2022), which cultivated with corn (Zea mays) and faba bean (Vicia faba L.) at Agricultural Research Station farm in Ismailia Governorate, Egypt. Faba bean (Vicia faba L.) was cultivated as an indicator crop to evaluate the residual effect of different rates of zinc nutrient in nanoparticles form versus mineral zinc sulphate fertilizer and studying their effects on growth and crop yield and some soil chemical properties. The zinc nutrient forms were applied by fertigation through sprinkler irrigation system. The obtained results revealed that the corn and bean parts dry matter, yield and some soil chemical properties including available soil nutrients content, EC, pH and SOM were greatly improved in general with additions of these nutrients forms. During zinc nanoparticles treatments, the most effective treatment was with the rate of half dose from minerals at recommended dose (ZnNPs at 50% MNRD). Mineral forms in normal recommended dose (MNRD) gave nearly equal effect with ZnNPs at 50 % MNRD.