Two field experiments were carried out during the fall seasons of 2012 and 2013 at the

During 2018-2019 and 2019-2020 seasons, two-field experiments were conducted at El-Kasasin Horticultural Research Station, Ismailia Governorate, Egypt, to test the impact of potassium humate(KH) and biochar with substitution part of recommended mineral fertilization on growth parameters, physical, chemical characteristics of pods and green yield of snap bean as well as some physical and chemical soil properties after harvesting. The experiment was laid out in randomized complete block design (RCBD) with nine treatments included; solo application from 2 ton biochar+4 kg KH and 4 ton biochar+6 kg KH and each one was mixed with 25, 50 and 75% NPK from recommended dose comparing with 100% NPK. Overall, the results of this study indicated that soil addition of 75% NPK+ 4 ton biochar+6 kg KH recorded the best mean values of all tested parameters and improved growth, which reflected on yield and its components followed by 100% NPK.

Nanotechnology presents brilliant agricultural products, which may be an achievement in addressing many common economic and ecological issues. Nano-fertilizers show special characters which do not exist in their conventional counterparts. So; this work conducted out during 2019 and 2020 seasons to investigate the effects of three forms of micronutrient Fe + Zn in foliar way (nano, EDTA and sulfate) under organic fertilization (without, chicken manure and FYM) on vegetative growth, physical, chemical and quality of pods and green yield of snap bean as well as some chemical properties of soil after harvesting. All treatments under investigation had significant effect on vegetative growth (plant height, number of branches, fresh, dry weight and chlorophyll content), pod physical quality (number, length, weight and diameter), green pod yield,nutritional value of snap bean leaves and pods (N, P, K%, Fe and Zn mg.kg-1), pod chemical quality as (protein, total carbohydrates, fiber and TSS%) and soil analysis after harvest (available N, P, K FC and S.P). The results in this study showed that, applying chicken manure and foliar application with nano Fe + Zn was the most suitable treatment significantly affected in all mentioned parameters comparing with the other treatments.