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Soils with Physical Problems
Published in Manorama K.C. Thampatti, Problem Soils, 2023
Addition of tank silt for coastal sandy soils is recommended for enhancing their productivity. Application of tank silt or black soil at the rate of 25 t ha-1 per year along with FYM, composted coir pith or press mud @ 25 t ha-1 is found to be good for highly permeable red soils. Deep ploughing the field with moldboard plough or disc plough during summer also improved the water holding capacity of the soil.
A Review on Performance, Vibration, Wear and Effect on Soil of Tillage Implements
Published in P. C. Thomas, Vishal John Mathai, Geevarghese Titus, Emerging Technologies for Sustainability, 2020
Rejosh Cherian Philip, Richin K. Philip, V. Sreerag
The tillage operation can be classified into different types like minimum tillage, strip tillage, rotary tillage, mulch tillage, and combined tillage. It can also be divided into primary and secondary tillage. Primary tillage is the initial opening up of soil. Different types of plough are used for the tillage operation. They include – indigenous plough, mold board plough, disc plough, chisel plough, rotary plough etc. Apart from these devices, earth augers and post hole diggers are devices used to dig holes in the earth. These devices may be driven with the help of animals or may be connected to a tractor or an engine or motor can be used as the power source.
Subsurface drainage systems
Published in Willem F. Vlotman, Lambert K. Smedema, David W. Rycroft, Modern Land Drainage, 2020
Willem F. Vlotman, Lambert K. Smedema, David W. Rycroft
There are two types: a vertical plough and a v-shaped plough (Figure 8.19). To avoid compression of the soil around the pipe, leading to high entry resistances, it is essential that the opening in the soil where the drainpipe is to be placed be created mainly by lifting the overlying soil rather than by forcing the soil to flow around the implement. The V-plough is better suited for this than the vertical plough. With the vertical plough smearing of the soil immediately adjacent to the pipe was found to be a problem in the UK (Spoor 1995).
Flowing interaction between cutting edge of ploughbreast with soil in shifting tillage operations
Published in Engineering Applications of Computational Fluid Mechanics, 2020
Jia-Wen Zhang, Lin Zhu, Pu Chen, Qin-Ming Wu, Min Wei, Cheng-Long Yin, Guo-Li Li
Tillage is one of the important field operations for the production of agricultural crops. This is because it can loosen, move, and mix the soil, thereby improving the soil physical state and structure, and creating an appropriate bed for plant growth (Kursat Celik et al., 2020). The common tillage tool is the mouldboard plough, whose crucial soil-tilling components are ploughshare, particularly its sharepoint, and mouldboard, particularly ploughshank of its ploughbreast (Ibrahmi et al., 2015). More generally, the mouldboard plough in the tillage operations necessitates much energy to rearrange seedbeds, thereby causing the violent flowing interaction between soil and tool (Singh et al., 2020). This interaction is surely detrimental to the tool performance and even has serious consequences for the tool life. Hence, development of the mouldboard plough with high tillage performances is essential to improve the crop production.
Are middle school mathematics teachers able to solve word problems without using variable?
Published in International Journal of Mathematical Education in Science and Technology, 2018
Burçin Gökkurt Özdemir, Emrullah Erdem, Tuğba Örnek, Yasin Soylu
In Figure 9, it is seen that the participant correctly solved the problem without a variable using the area model. However, it cannot be said that the solution is completely clear and understandable when the solution of the problem is analyzed in detail. The participant was asked to explain his solution in detail in the interview. In this regard, the dialogue between the researcher and participant is as follows. R: Could you explain in detail how you solved the problem?P10: If the land, which is plowed with a tractor in 6 hours, is plowed with a plough in 30 hours, the operating speed of the tractor is a multiple of 5 of the operating speed of the plough. So, the work which is performed by the tractor in 1 hour can be performed by the plough in 5 hours. Assume that the land is an area consisting of 6 units. Given the fact that the tractor could finish the area corresponding to each unit in 6 hours, the plough finishes it in 5 hours. As the tractor worked for 4 hours, it plowed 4-unit of the land. As the remaining part will be plowed by the plough and it can finish each unit in 5 hours, it finishes it in 10 hours in total.
Novel approach to find the optimal parameters of a tractor disc plough used for land preparation
Published in Engineering Optimization, 2022
Thanatkij Srichok, Rapeepan Pitakaso, Kanchana Sethanan, Orawich Kumphon, Sirorat Pattanapairoj, Kongkidakhon Worasan
The proposed method begins with experimental research. The real experiment was executed according to the RSM procedure. The RSM starts by using the CCD to generate the combination of the experiments. CCD generates 31 combinations of experiments; therefore, 31 pieces of land are prepared and each piece of land has a size of 1600 m2 (all land has loamy soil). The total amount of fuel used to prepare each area was collected, and the results are shown in Figure 3. The parameter values for the disc plough and the tractor were set according to the values suggested by CCD.