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Role of Water in Plant System
Published in A. Zaman, Md. Hedayetullah, Sustainable Water Resource Development and Management, 2022
Field capacity refers to the amount of water present in the soil after excess water has been drained out. The rate of downward movement has decreased, which usually takes place within 1–3 days after a rain or artificial application of water under the same pervious soils having uniform texture and structure. The soil moisture tension at FC varies on the soil texture range from 0.10 to 0.33 bars. It is assumed that as the upper limit of available soil water. The FC is greatly influenced by the size of the soil particles, finer the soil particles higher the water retention due to very large surface area and vice versa.
Engineering Hydrology
Published in P.K. Jayasree, K Balan, V Rani, Practical Civil Engineering, 2021
P.K. Jayasree, K Balan, V Rani
Field capacity: Field capacity is the moisture content of the soil after free drainage has removed most of the gravity water. The concept of field capacity is extremely useful in arriving at the amount of water available in the soil for plant use. Most of the gravitational water drains through the soil before it can be used consumptively by plants.
The Hydrodynamics of Leachate in Recirculating Landfills
Published in Debra R. Reinhart, Timothy G. Townsend, Landfill Bioreactor Design and Operation, 2018
Debra R. Reinhart, Timothy G. Townsend
Holmes66 reported findings from an analysis of samples obtained from nineteen landfills. Field capacity was observed to decline with age due to the degradation of organic fractions that contribute to most of the absorption capacity of waste. Field capacity also decreased with increasing density due to the collapse of pore spaces available to moisture migration and retention. Other researchers have observed a significant decrease in moisture retention in baled waste.74
Measurement and modelling of organic matter’s altering effect on dielectric behavior of soil in the region of 200 MHz to 14 GHz
Published in Journal of Microwave Power and Electromagnetic Energy, 2023
Prachi Palta, Prabhdeep Kaur, K. S. Mann
It was observed that OM present in soil affects water retention properties of soil. The results showed that as OM in soil increased from 0.78% to 17.28% of total soil mass, field capacity (FC) of soil increased from 5.55 to 34.69 (% total volume) as shown in Figure 1. The increase in FC is attributed to the reason that presence of OM in soil improves soil structure and increase surface area for incoming water molecules (Chiou et al. 1990). As soil structure refines, the binding forces between soil and water molecules increase which results in the water holding capacity of the soil. Hence, the FC of soil increases with the OM of soil. Similar results have been observed earlier by researchers like BD Hudson (1994), Huntington (2006), Minasny and McBratney (2018), etc.
Variations of infiltration capacity with flow hydraulic parameters in permeable stormwater channels
Published in ISH Journal of Hydraulic Engineering, 2022
Badronnisa Yusuf, Ahmed Mohammed Sami Al-Janabi, Abdul Halim Ghazali, Ibrahiem Al-Ani
In all experimental tests, the initial soil moisture was set to the field capacity. Hence, before the present tests were conducted, the soil was allowed to fully saturate and then drain for 2–3 days to attain the field capacity. An electronic device that contains soil moisture sensor and reader was used to observe the change in soil-water content and confirm the attainment of the field capacity. The soil was thereafter further re-compacted before each test to ensure that the target bulk density of 1.3 g/cm3 was achieved and to fill any cracks or holes.
Measurement and modelling of soil dielectric properties as a function of soil class and moisture content
Published in Journal of Microwave Power and Electromagnetic Energy, 2020
Humayun Kabir, Mohammad Jamal Khan, Graham Brodie, Dorin Gupta, Alexis Pang, Mohan V. Jacob, Elsa Antunes
Because sand has a much lower surface area per unit volume than the other mineral components of soil, the moisture holding capacity, and therefore the field capacity of soils is inversely related to their sand content. Therefore, the field capacity of the Dookie Sand Soil is much lower than that of the other three soils, because of its high sand content (83.8% - Table 1), compared with the other soils (47.0% to 56.2% - Table 1). This is evident in the dielectric properties of this soil, which are much lower than those of the other soils (Figure 2).