Applied Agricultural Research
Year:2018 | Volume:31 | Issue:3 (120) |Papers Count:6

Introduction: Deficit of water resources is one of the limitations for sugar beet cultivation in arid and semi-arid regions (Shahbazi et al., 2015) and therefore the use of compounds that can improve growth and yield of sugar beet under these restricting conditions is of the most important research priorities. Potassium plays an important role in ameliorating the injurious effects of water deficit on plants. Potassium along with other anions is involved in maintaining turgor in guard cells of stomata so that increasing concentrations of potassium in guard cells causes their osmotic potential to become more negative, resulting in the absorption of water from the surrounding cells. This makes guard cells turgid and consequently leads to stomatal opening. Silicon (Si) is a non-essential nutrient for most plants.

Introduction: Conservation tillage methods offer considerable advantages compared to the conventional tillage; therefore, these tillage methods are widely disseminated throughout the world. Conservation tillage affects soil properties, environment, and crop yield. Results of research studies show that conservation tillage saves water in wheat production compared to the conventional tillage (Erenstein & Laxmi, 2008). Conservation tillage also increases soil organic carbon (Madejon et al., 2009) and sesame yield (Uzun et al., 2012) as compared to the conventional tillage. This study was performed to evaluate the effects of conservation tillage practices on soil properties and sesame yield in sesame-wheat crop rotation under hot climatic condition of Fars province...

Introduction: Estimating the land area under crop cultivation based on peripheral aspects of production including seeding rate, fertilizer and the amount of chemical inputs delivered to farmers as well as evaluations by consulting firms is time consuming and cost intensive. Nowadays, using satellite data as a new solution not only reduces the drawbacks of conventional estimation methods of cultivated land areas, but also can be beneficial for various planning aims in the agricultural sphere. Land cover mapping is important for many of processes related to plan-making and activities associated with crop production management...

Introduction: Maize (Zea mays) is one of the most important crops with high nutritive requirements. Due to the characteristics of its rooting system, which occupies large volumes of soil surface, maize develops a great deal of interaction with soil microorganisms and as a result, it is greatly influenced by soil microbial communities. Pseudomonas and Bacillus are the most important PGPRs that increase plant growth directly or indirectly via different mechanisms such as production of plant hormones (auxin, cytokinin, and gibberellic acid). This may result in increased plant root mass and root branching, ultimately contributing to the increased rates of nutrient uptake by roots...

Introduction: One of the important deleterious effects of drought stress on plants is the disruption in the absorption and accumulation of nutrients, leading to decreased grain yield (Chogan, 2004). At some developmental stages of plants, the production of photosynthetic substances exceeds their requirement. As a result, these substances, which are stored as non-structural compounds in vegetative parts of plants such as stem, panicle and leaf, will move towards grain in a process known as remobilization upon the establishment of strong physiological sinks. Given the differences among rice genotypes, it appears that the genotypes that allocate a greater portion of their photosynthate to their economically important organs (grain) tend to show less yield decrease (Sinaki et al., 2007)...

Introduction Cumin (Cuminum cyminum) is an economically important plant from the Apiaceae family. It has medicinal properties and exhibits tolerance to drought stress. Cumin is mainly cultivated in Iran, India, Syria, Pakistan and Turkey and is widely used in foods, beverages and perfume and pharmaceutical industries. The mature dried fruit of cumin contains 2-5% essential oil (Gohari and Saeidnia, 2011, Li & Jiang, 2004). It is a monotypic species with low phenotypic and genetic variability (Bahraminejad, et al., 2011). Evaluation of variability in plant species for genetic resources preservation and practical and scientific application of these plant germplasm resources are crucial for plant breeders...