A Large, Undisturbed, Weighing Lysimeter for Grassland Studies

Armijo, Joe D.; Twitchell, George; Nunn, R.

doi:10.13031/2013.38019

Cited by 23 publications

(2 citation statements)

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“…Based on the available resources and necessity, lysimeters in different sizes and types are designed to study the water and solute transport [9], as well as ET rates [10][11][12][13]. The shapes of lysimeters are varied, including a rectangular shape [14][15][16][17][18], circular shape [19][20][21], and square shape [22,23].…”

Section: Introductionmentioning

confidence: 99%

Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment

et al. 2019

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The determination of the water requirements and crop coefficient (Kc) of agricultural crops helps to create an appropriate irrigation schedule, and with the effective management of irrigation water. The aim of this research was to estimate the water requirement, Kc, and water-use efficiency (WUE) of potato using non-weighing-type lysimeters in four regions of the Kingdom of Saudi Arabia (Qassiem, Riyadh, Al-Jouf, and Eastern). Our results clearly show that the accumulated values of the measured crop evapotranspiration of potato derived from the lysimeters were 573, 554, 592, and 570 mm, while the accumulated values of the predicted crop evapotranspiration from Penman-Monteith equation based on FAO (Food and Agriculture Organization) were 651, 632, 672, and 647 mm for the Qassiem, Riyadh, Al-Jouf, and Eastern regions, respectively. The Kc values of potato obtained from the lysimeters were Kc initial (0.58, 0.54, 0.50, and 0.52), Kc middle (1.02, 1.05, 1.13, and 1.10), and Kc end (0.73, 0.74, 0.74, and 0.75) for the Qassiem, Riyadh, Al-Jouf, and Eastern regions, respectively. Based on the amount of water used and the yield achieved, the highest WUE (3.6 kg m−3) was observed in the Riyadh region, while the lowest WUE (1.5 kg m−3) was observed in the Al-Jouf region.

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Section: Introductionmentioning

confidence: 99%

Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment

et al. 2019

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“…Larger versions of these lysimeters exist and can offer insight into interactions with landscape processes such as groundwater fluctuations and lateral flow. For instance, weighing lysimeters can be applied to larger volumes of soil to precisely calculate the water balance, but they are costly and require intensive maintenance (Armijo et al, 1972).…”

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Development of Field-Scale Lysimeters to Assess Management Impacts on Runoff

Duncan¹,

Kleinman

Folmar³

et al. 2017

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Most empirical studies of field management effects on runoff water quality rely on edge-of-field monitoring, which is generally unreplicated and prone to high variances, or small plots, which constrain the use of conventional farm equipment and can hinder insight into landscape processes that drive hydrology. We sought to develop field-scale lysimeters that were sufficiently large to support assessment of landscape processes but also replicated to allow quantitative comparisons of hydrologic processes. A hillslope underlain by limestone bedrock with a recent history of hydrologic observation was selected in central Pennsylvania. Twelve 15 m  27 m plots were established and defined by earthen berms on all sides to isolate and collect overland flow, along with tile drains to collect shallow lateral flow. Over three years, considerable variability in site hydrology was observed between lysimeters, highlighting differences in the extent of hydrologic isolation of some lysimeters as well as in flows that potentially bypassed our collection infrastructure. Even so, clear patterns were observed in surface and subsurface flow that enabled grouping of plots based on hydrologic similarities. Results illustrate the experimental opportunities and limitations of developing field-scale lysimeters for agronomic inference.

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Factors influencing ammonia volatilization from urea in soils of the shortgrass steppe

et al. 1988

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The effects of soil moisture, temperature, and humidity treatments on urea hydrolysis and NH 3 volatilization were assessed in the laboratory. Field studies were conducted to determine seasonal NH 3 losses from simulated urine patches applied to contrasting soils of a representative hillslope of the shortgrass steppe region in the North American Great Plains.Losses ofNH3-N were most influenced by soil moisture. The effects of temperature and humidity on total, or temporal, losses of NH 3 were dependent on soil moisture. Losses ranged from 18.5 % under conditions of low-temperature/high-humidity/wet soil to 7.7% under conditions of hightemperature/low-humidity/dry soil. In contrast, urea hydrolysis was not affected by soil moisture.Losses of NH3-N from simulated urine applied to field plots ranged from 1.5% on footslope soils in summer to 14.1% on backslope (midslope) soils in summer, whereas losses were 8.1% on backslope soils in winter. Factors such as soil texture, microbial activity, and plant productivity along a toposequence had larger effects than climatic variables on variation in the volatile losses of NH 3-N from this grassland.

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A Large, Undisturbed, Weighing Lysimeter for Grassland Studies

Cited by 23 publications

References 0 publications

Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment

Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment

Development of Field-Scale Lysimeters to Assess Management Impacts on Runoff

Factors influencing ammonia volatilization from urea in soils of the shortgrass steppe

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