Agricultural Engineering

Research Paper

The Effect of Different Seeding Methods on Grain Yield and the Use of Combine Platform Extension on Canola Harvesting Losses

M. Ashtari; M.A. Asoodar

Volume 34, Issue 1 , December 2011, Pages 1-12

Abstract

One of the problems of canola production is the lack of interest in farmers towards planting this crop. This could stem from lack of suitable planting method and the high amount of grain loss at harvest. In order to evaluate the effect of seeding methods, type of combine platforms and their interaction ... Read More

Research Paper

A Laboratorial Investigation of the Effects of the Magnetic Water on the Amount of Soil Minerals in the Process of Leaching

E. Zangene Usefabadi; M. Behzad; S. Boroomand Nasab

Volume 34, Issue 1 , December 2011, Pages 13-28

Abstract

Transmission of water through a magnetic field will cause some changes in water characteristics, affecting the overall behavior of water molecules including increasing solubility of some of compositions and decreasing water surface tension. This study was conducted with the aim of examining the effects ... Read More Transmission of water through a magnetic field will cause some changes in water characteristics, affecting the overall behavior of water molecules including increasing solubility of some of compositions and decreasing water surface tension. This study was conducted with the aim of examining the effects of magnetic water on the level of remaining cations and anions of saline soil, in laboratory conditions, in a compeletly randomaized design. Soil with loam silt texture was poured in pipes with the height of 50 cm and diameter of 10 cm while the end of each pipe was closed with a filter paper and a plastic net. By passing water through the magnetic field with different intensities (6500 Gaousses in first magnetic treatment, 8000 Gaousses in second magnetic treatment), leaching was performed alternatively. At the end of the leaching experiment, the experimental soil was divided into three equal depths and amount of cations ana anions was measured. The result of chemical analysis showed that the avrage amount of the remaining sodium of the soil in the first magnetic treatment, 11.7 %, and in second magnetic treatment, 22.8 %, was lower than the controlled treatment. The avrage amount of the remaining potassium of the soil in the first magnetic treatment, 2.8 %, and in second magnetic treatment, 8.5 %, was lower than the controlled treatment. The avrage amount of the remaining calcium of the soil in the first magnetic treatment, 2 %, and in second magnetic treatment, 16 %, was lower than the controlled treatment. The avrage amount of the remaining magnesium of the soil in the first magnetic treatment, 6 %, and in second magnetic treatment, 13 %, was lower than the controlled treatment. The avrage amount of the remaining chlorine of the soil in first magnetic treatment, 14 %, and in second magnetic treatment, 14.7 %, was lower than the treatment. The avrage amount of the remaining sulfate of the soil in the first magnetic treatment, 2 %, and in second magnetic treatment, 5.8 %, was lower than the controlled treatment.

Research Paper

Potassium Release from Biotite and Its Biological Weathering as Influenced by Organic Matter Treatments

Volume 34, Issue 1 , December 2011, Pages 29-42

Abstract

In recent years, many studies have been carried out on the biological changes of micaeous minerals and their potassium release by plant types and microorganisms. However, there is little information on the effect of organic matter (OM) on the biological transformation of biotite and its potassium release. ... Read More

Research Paper

The Effect of Different Tillage Methods on Dryland Wheat Yield of Canola-Wheat Rotation in Khouzestan Province

Volume 34, Issue 1 , December 2011, Pages 43-55

Abstract

The current study was conducted to compare the effect of different tillage methods on wheat yield of canola-wheat rotation in dryland areas during three years (2005-2008) north of Khouzestan (Baghmalek city). Randomized block design with five treatments was applied by using four replications. Canola ... Read More

Research Paper

Investigating and Modeling the Process of Dehulling Persian Lilac Fruits Using Sodium Hydroxide with Different Concentrations and Temperatures

Volume 34, Issue 1 , December 2011, Pages 57-64

Abstract

Persian lilac fruit is an inedible fruit that contains oil seeds which can be used for industrial purposes. Dehulling is a primary step which must be done on the fruit before extracting oil from them. In this research, the process of dehulling Persian lilac fruits by sodium hydroxide was investigated ... Read More

Research Paper

Determining Suitable Mathematical Model and Repair Coefficients to Predict the Repair and Maintenance Costs of AUSTOFT 7000 Sugarcane Harvester

Volume 34, Issue 1 , December 2011, Pages 65-74

Abstract

Maintenance plays an important role in sustaining the reliability, availability, product quality, reducing risk, increasing efficiency and security. Hence being aware of maintenance costs and also replacement age of machines seems necessary. In this research the costs of repair and maintenance related ... Read More

Research Paper

Construction and Evaluation of a Boom Atomizer Sprayer to Control of Sunn Pests in Awheat Crop

Volume 34, Issue 1 , December 2011, Pages 75-86

Abstract

Chemical spraying is one of the important field operations in wheat production. Farmers usually use lance sprayers, micronair sprayer and atomizer sprayer (motorized knapsack mist blower) in order to control the sunn pest when wheat plant is reach to a desire high. Sunn pest damaged on wheat plant ... Read More Chemical spraying is one of the important field operations in wheat production. Farmers usually use lance sprayers, micronair sprayer and atomizer sprayer (motorized knapsack mist blower) in order to control the sunn pest when wheat plant is reach to a desire high. Sunn pest damaged on wheat plant lead to a serious problem in which when targeted plants spray with chemical, the sunn population keep protecting themselves by moving down ward to the lower parts of plant stem. The above mentioned sprayers can not be used to spray with in wheat canopies, while it has been shown that a modified atomizer sprayer is capable of targeting the lower portion of wheat canopies. In this study a conventional atomizer sprayer was manipulated with an boom type to provide a modified atomizer sprayer. Then the modified atomizer sprayer was used to compare with lance atomizer and micronair sprayers in relation to chemical spraying efficiency for controlling the sunn pest damaged in wheat production. The experimental design was setup randomized completed block design (RCBD) with three replications. Results showed that modified atomizer and lance were the first and last sprayers which had lethal effects of 92.6% and 46.5% respectively on the sunn pest at the 5% confidence level. Amount of drifting were 43.1% and 8.3% mioconair and modified atomizer sprayers respectively, at the 1% confidence level. The least amount of solution consumption (11.4 lit/ha.) and the best spraying uniformity were occurred under micronair sprayer operation.VMD and NMD were 388 µm and 286 µm for micronair sprayer respectively. When plant stand was evaluated, there was not any significant difference among sprayer systems in regard to crop lost, except for the lance sprayer which has showed 5.6% crop damaging at the 1% confidence level. Findings in the present study indicated that modified atomizer sprayer is capable of covering more spaces at the middle and bottom of plant canopies with high density (droplets / square cm) than other sprayers. Boom modified atomizer sprayer is strongly recommended as the sunn pest controller in wheat crop, when the plants reached to desirable height.

Agricultural Engineering

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Volume & Issue: Volume 34, Issue 1, December 2011, Pages 1-86

The Effect of Different Seeding Methods on Grain Yield and the Use of Combine Platform Extension on Canola Harvesting Losses

Abstract

A Laboratorial Investigation of the Effects of the Magnetic Water on the Amount of Soil Minerals in the Process of Leaching

Abstract

Potassium Release from Biotite and Its Biological Weathering as Influenced by Organic Matter Treatments

Abstract

The Effect of Different Tillage Methods on Dryland Wheat Yield of Canola-Wheat Rotation in Khouzestan Province

Abstract

Investigating and Modeling the Process of Dehulling Persian Lilac Fruits Using Sodium Hydroxide with Different Concentrations and Temperatures

Abstract

Determining Suitable Mathematical Model and Repair Coefficients to Predict the Repair and Maintenance Costs of AUSTOFT 7000 Sugarcane Harvester

Abstract

Construction and Evaluation of a Boom Atomizer Sprayer to Control of Sunn Pests in Awheat Crop

Abstract