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The field capacity of a certain soils is 183 and its specific gravity is 125 A wet sample of the soil taken before irrigation weighs 153gm and weight after drying in the oven is 138gm What depth of water must be applied to irrigate the soil to a?1 AnswerUndisturbed soil sample is collected from a field when the soil moisture is at field capacity. The inside diameter of the core sampler is 7.5 cm with a height of 15 cm. Weight of the core sampling cylinder with moist soil is 2.81 kg and that with oven dry soil is 2.61 kg. The weight of the core sampling cylinder is 1.56 kg. Assuming π = 3.14, the water depth in centimeter per meter depth of soil (rounded off to two decimal places) is _________.0 AnswerThe field capacity of a certain soil is 126 and its specific gravity is 142 If the moisture content of present in the soil before irrigation is 82 .How deep the soil profile will be welted with an application of 50mm of irrigation water?1 AnswerIf the water content of a fully saturated soil mass is 100%, the void ratio of the sample is -gate civil 20171 Answer If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: - gate civil 20171 Answer If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: - gate civil 20171 Answer If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: -gate civil 20171 Answer If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: - gate civil 20171 AnswerAn irrigation stream of 27 L s-1 is diverted to a check basin of size 12 m × 12 m. The water holding capacity of the soil is 15% and the average soil moisture content in the crop root zone prior to applying water is 7.5%. The depth of crop root zone is 1.2 m and apparent specific gravity of the soil is 1.5. Assuming no loss due to deep percolation, irrigation time (in minute) required to replenish the root zone moisture to its field capacity is _________.0 AnswerIf the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: - gate civil 2017 1 Answer If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is: -gate civil 20171 AnswerA border strip of 8 × 250 m is being irrigated by a border stream of 50 lps. The infiltration capacity of the soil is 25 mm h−1 (assumed to be constant throughout the period of irrigation). GATE-Agricultural Engineering-Question-20121 AnswerA soil has specific gravity of itssolids equal to 2.65. The mass density of water is 1000 kg/m30 AnswerA 588 cm3 volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. - gate civil 2017 1 AnswerIn a cropped field, the following data are observed. Moisture content at field capacity (weight basis) = 36% Current moisture content (weight basis) = 24% Bulk density of soil = 1.5 Mg m-3 Effective root zone depth = 0.8 m Conveyance efficiency = 80%1 AnswerThe root zone of a certain soil has a field capacity of 30 and permanent wilting percentage is 10 i) What is the depth of moisture in the root zone at field capacity and permanent wilting point ii) How much water is available if the root zone dept?1 AnswerIn a shrinkage limit test, the volume and mass of a dry soil pat are found to be 50 cm^3 and 88 g, respectively. The specific gravity of the soil solids is 2.71 and the density of water is 1 g/cc. The shrinkage limit (in %, up to two decimal places) is _____ (GATE-CIVIL-Engg-2018)1 AnswerDetermine the area which can be irrigated using surface method of irrigation with a source of water having a discharge of 10000 litres per minute. The available moisture holding capacity of the soil is 180mm per metre and depth of root zone is 1.1m.1 AnswerAn earth embankment is to be constructed with compacted cohesionless soil. The volume of the embankment is 5000 m3 and the target dry unit weight is 16.2 kN/m3 . Three nearby sites (see figure below) have been identified from where the required soil can be transported to the construction site. The void ratios (e) of different sites are shown in the figure. Assume the specific gravity of soil to be 2.7 for all three sites. If the cost of transportation per km is twice the cost of excavation per m3 of borrow pits, which site would you choose as the most economic solution? (Use unit weight of water = 10 kN/m3 ) - gate civil 2017 1 AnswerA square footing of 4 m side is placed at 1 m depth in a sand deposit. The dry unit weight () of sand is 15 kN/m3 . This footing has an ultimate bearing capacity of 600 kPa. Consider the depth factors: dq = d = 1.0 and the bearing capacity factor: N = 18.75. This footing is placed at a depth of 2 m in the same soil deposit.0 Answer
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