Adel Ranji; davood Mohammad Zamani; Mohammad Gholami Porshokoohi; Mohammad Ghahderijani
Abstract
In order to find how different types of weeders (powered and non-powered) are working in controlling weeds of peddy lands in which two rice cultivars, Deilamani and Hassansaraei, were grown, a field experiment was conducted in 2017-2018. This study was performed as a factorial experiment with cultivar ...
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In order to find how different types of weeders (powered and non-powered) are working in controlling weeds of peddy lands in which two rice cultivars, Deilamani and Hassansaraei, were grown, a field experiment was conducted in 2017-2018. This study was performed as a factorial experiment with cultivar in two levels, Deilamani and Hassansaraei, and weeding method in five levels including manual motor weeding, using single-row, two-row, three-row weeders, and control. The experiment was performed in a randomized complete block design with three replications. Evaluation parameters in this study included field capacity, field efficiency, weeding efficiency, weed charateristics, plant growth charateristics and the rate of damaged plants. The results showed that the highest (91.91%) and lowest (91.33%) efficiency were obtained when single-row powered weeder and three-row powered weeder, reaspectively, were used. In terms of field capacity, the single-row powered weeder was on the top of the list with 0.198 ha.h-1, and the non-powered manual weeder was at the bottom of the list with 0.0096 ha.h-1. In terms of field efficiency, the single-row powered weeder was on the top of the list with 78.22%, and the non-powered manual weeder was at the bottom of the list with 65.53%. The results obtained from this study indicated that the single-row powered weeder was recognized as the best weeder in controlling the rice weeds where Deilamani and Hassansaraei cultivars are growing.
seyed mohamad javidan; davood Mohammad zamani
Abstract
Semi-automatic tomato transplanter with conical distributing cups was designed, constructed and evaluated for mechanical transplanting of tomatoes seedlings. In this device, individual seedling was placed inside the cone bowls, by a mechanical distributer, and fell down into a previously plowed furrow ...
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Semi-automatic tomato transplanter with conical distributing cups was designed, constructed and evaluated for mechanical transplanting of tomatoes seedlings. In this device, individual seedling was placed inside the cone bowls, by a mechanical distributer, and fell down into a previously plowed furrow via a tube. Cultivation accuracy variables including seedling spacing on the row, mechanical damages to seedlings, and seedling establishment angle, created with vertical line, were investigated. Tests used a factorial randomized complete block design with ten replications. The treatments included traveling speed (1, 2, and 3 kmh-1) and depth of roots established in the soil (5 and 10 cm). Results showed that the interactions between traveling speed and depth of cultivation did not affect the variables studied and the traveling speed factor was significant only at seedling establishment angle and mechanical damage to seedling; this factor had no significant effects on spacing. Also, cultivation depth was effective only at the deployment angle. Results indicated that the most appropriate traveling speed and depth of planting were 2 kmh-1 and 5 cm respectively. The capacity of the machine in this traveling speed, in single-row, was found 0.08 hah-1, theoretically.
davood mohammadzamani
Abstract
The present study designed, constructed, and evaluated a fully-automatic tomato transplanter. In this device, a step mechanism gradually guides the tray to the left, right, and down under the arm so that the pin lifter can be position to penetrate the soil in the cell to grasp a seedling. The arm then ...
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The present study designed, constructed, and evaluated a fully-automatic tomato transplanter. In this device, a step mechanism gradually guides the tray to the left, right, and down under the arm so that the pin lifter can be position to penetrate the soil in the cell to grasp a seedling. The arm then positions itself over the tube and releases the seedling in its soil pot. The seedling falls into the previously plowed furrow. To evaluate operation of the machine, field testing was conducted. Mechanical damage to seedlings, seedling establishment angle according to the vertical line, and seedling spacing on the row was investigated. Tests used a factorial randomized complete block design with three replications. The treatments consisted of traveling speed (1, 1.5, and 2 kmh-1) and depth (5 and 10 cm). In each experimental unit of the block, the machine traveled the 22 m length to plant one row. Results showed that traveling speed, depth, and the interaction of distance between planted seedlings, seedling establishment angle, and mechanical damage to seedling was significant. Results indicated that the most appropriate traveling speed was 1 kmh-1 and depth of planting was 5 cm. With a traveling speed of 1 kmh-1, a theoretical capacity of 0.06 hah-1 was determined for the single-row machine.
