Application of humic acid as an organic acid derived from humus and other natural resources along with iron could be beneficial to overcoming, at least in part, the nutrients deficiencies in the grapes. In order to evaluate the effects of humic acid and iron on fruit yield and concentration of nutrient elements in the leaf of grape, a factorial experiment based on a randomized complete block de...

  This study was carried out to investigate the effect of Humic acid and micronutrient nano fertilizers on rainfed chickpea response under field conditions located in Kamyaran-Kurdistan during 2015-2016 year. The experiment was split plots in a randomized complete block design with three replications. The main factor was foliar application of Humic acid in three levels including (control, four ...

To investigate the effects of chemical, organic and biological fertilizers application on the quantitative and qualitative characteristics of seedless barberry (Berberis vulgaris cv. Asperma) an experiment was conducted as split plot randomized complete block design with three replications in commercial garden in Qaen during 2016. Main-treatments comprised four application type of fertilizer (1...

Iron (Fe) and zinc (Zn) deficiency has been known as a key factor in limiting crop production in calcareous soils of arid and semi-arid regions. Since the components of organic matter can change Fe and Zn availability, this study was conducted to investigate the effects of humic treatments including humic acid (HA), fulvic acid (FA), vermicompost (Verm), HA+FA and HA+FA+Verm and mycorhiza inocu...

To evaluate the effect of different concentrations of humic acid on guar (Cyamopsis tetragonoloba L.) yield and nutrient uptake in different sowing densities, an experiment was carried out by using a split plot design with three replications based on a randomized complete block design, in Agricultural Sciences and Natural Resources University of Khuzestan, Iran at summer 2016. Experimental fact...

Extended Abstract Introduction: Today, seed priming is widely used to improve seed germination in a wide range of plant species. As a result of seed pre-treatment, several molecular and biochemical changes occur, including increased macromolecule synthesis, enzyme activity and formation of different metabolites. Enzymatic and metabolic activities, synthesis of proteins in quantitative and qual...

Humic substances are the most important organic fractions in soils and have affinity towards trace metals. In order to evaluate the effect of humic acid on zinc (Zn) sorption and desorption by soil,‌ a batch experiment was conducted with two soil samples which were different in clay and calcium carbonate contents. Three levels of humic acid (0,‌ 200, 500 mg/L) and various Zn concentrations (0 t...

Humic acid by binding to biotoxin, can vary their toxicity and mobility at different environments. Therefore, the interaction between nanoparticles and humic acid is considered environmental point of view specially. The objective of this study was investigation of ZnO nanoparticle toxicity on rapeseed at germination growing stage, and also study of the nanoparticle toxicity reduction by humic a...