فهرست مطالب داوود محمد زمانی

In order to evaluate the stability of the yield of lentil ecotypes in Qazvin province, an experiment in the form of a randomized block design was carried out in six planting dates (environment) with three replications at the soil and water conservation research station of Tehran University in Kohin rainfed lands. The results of composite variance analysis showed a significant difference between environments, genotypes and the interaction effect of genotype × environment.The analysis of additive main effects and multiplicative interaction effects (AMMI) showed that the grain yield of lentil genotypes is influenced by the environmental part of the interaction effect of genotype × environment. In the analysis AMMI of the sum of squares, 55.8% was caused by environmental effects, 27% by genotypic effects and 17.2 % were justified by the genotype × environment interaction. In the AMMI method, the FILIP 2003-9L genotype with favorable relative performance and the lowest estimate of stability value (ASV) was introduced as the most stable genotype and Sabz Pardis with the best performance and the highest estimate of stability value was introduced as the most unstable genotype. In the biplot analysis of the AMMI model, the genotype FILIP 2003-9L with favorable yield and low IPCA1 value, general stability in all conditions and Sabz Pardis genotype with the highest IPCA1, showed good private compatibility with Autumn cultivation.

Despite the dangers of agricultural pesticides for human, animals, and the environment, spraying is the main way to control weeds, pests, and plant diseases. The size of particle and uniformity of toxin distribution during spraying time are two of the most influencing factors in the spraying quality. To achieve this, it is necessary to study the effect of various factors on the behavior and movement pattern of toxin particles from the time of spraying until the moment of settling on the plant. Using experimental method, is the most common method for assessing the quality of spraying. In this research, using ANSYS R17.1 software computational fluid dynamics (CFD) method was used to simulate the fluid behavior as an alternative to the experimental method. Therefore, the effect of three types of Tee Jet nozzles of 0-21, 0-110, and 110-04 with various pressure levels of 2, 3, and 4 bar were evaluated. A factorial experiment with 3 replications in a completely randomized design and Duncan's test were applied to compare the means of treatments. The data from simulation and experimental results demonstrated that the best nozzle in terms of uniform volume distribution of particles was sprayer nozzle 110/03 which has the best spraying uniformity in the three pressure levels studied compared to other nozzles. Comparing the spray angle results revealed that the maximum difference between the experimental method and the simulation was only 8%. Finally, it was concluded that computational fluid dynamics modeling is an appropriate method for predicting the behavior of toxin particles during the spray from the nozzle.