Determining placement criteria of moisture sensors through temporal stability analysis of soil water contents for a variable rate irrigation system

2017 ◽  
Vol 19 (4) ◽  
pp. 648-665 ◽  
Author(s):  
Weixia Zhao ◽  
Jiusheng Li ◽  
Rumiao Yang ◽  
Yanfeng Li
Keyword(s):  
Stability Analysis ◽  
Soil Water ◽  
Irrigation System ◽  
Temporal Stability ◽  
Variable Rate ◽  
Water Contents ◽  
Soil Water Contents ◽  
Variable Rate Irrigation

Estimating spatial mean soil water contents of sloping jujube orchards using temporal stability

2011 ◽  
Vol 102 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Xiaodong Gao ◽  
Pute Wu ◽  
Xining Zhao ◽  
Yinguang Shi ◽  
Jiawen Wang
Keyword(s):  
Soil Water ◽  
Temporal Stability ◽  
Water Contents ◽  
Soil Water Contents

scholarly journals Assessment of a Large Subsurface Controlled Drainage and Irrigation System: I. Design, Soil Properties, and Water Management

2010 ◽  
Vol 44-45 (2010-2011) ◽  
pp. 1-7
Author(s):  
Michael Aide ◽  
Indi Braden ◽  
Neil Hermann ◽  
David Mauk ◽  
Wesley Mueller ◽  
...  
Keyword(s):  
Soil Water ◽  
Crop Yields ◽  
Irrigation System ◽  
Drainage System ◽  
Subsurface Drainage ◽  
Nutrient Concentrations ◽  
Agronomic Performance ◽  
Irrigation Drainage ◽  
Water Contents ◽  
Soil Water Contents

Abstract Controlled subsurface drainage irrigation systems have been designed to promote agronomic performance and to limit overland transport of nutrients during high rainfall events. In this manuscript we describe the design of a 40 ha controlled subsurface drainage irrigation system, describe the soil resource and describe the soil water contents influenced by drainage and irrigation operations. With the use of the Subsurface controlled irrigation/drainage system, crop yields approach regional yield thresholds and soil water contents were maintained between field capacity and the maximum allowed soil water deficit, thus optimizing crop growth and development. In companion manuscripts we describe agronomic performance of corn (Zea mays L.), nutrient uptake patterns, and nutrient concentrations from tile drain effluents and note their potential impact on surface water resources.

scholarly journals ANALYSIS THE WETTED AREA FOR SUBSURFACE DRIP IRRIGATION IN DIFFERENT SOILS TEXTURE

2020 ◽  
Vol 51 (2) ◽  
pp. 712-722
Author(s):  
Z. K. Rasheed
Keyword(s):  
Soil Water ◽  
Drip Irrigation ◽  
Sandy Loam ◽  
Irrigation System ◽  
Subsurface Drip Irrigation ◽  
Wetted Area ◽  
Subsurface Drip ◽  
Water Contents ◽  
Soil Water Contents ◽  
Volumetric Soil Water

Subsurface drip irrigation is one of the most efficient systems for management of water.  This study is aimed to analysis the wetted area for subsurface drip irrigation system.  Several models are developed for predicting the wetted widths and the wetted depths which are very important for designing an optimal irrigation system. HYDRUS/2D is used for predicting the dimensions of wetting patterns numerically by using the two dimensional transient flow of water from a subsurface drip irrigation through sandy loam and loamy sand soils.   The wetting patterns from a subsurface drip source are simulated by using the system of United States Department of Agriculture, USDA, the wetting patterns are simulated at different values of applied heads, different diameters of drip, and different values of initial volumetric soil water contents which selected as initial conditions.  In this work, greater spreading occurs in loamy sand than sandy loam in vertical and horizontal directions. Moreover, the results showed that the empirical formulas which can be used for estimating the wetting dimensions of wetted width and wetted depth in terms of initial volumetric soil water contents, applied heads, diameters of the drip and times of operation, are good with an average relative error not exceed 3%, so it can be used to assist the designers in irrigation field.

Temporal Stability of Soil Water Contents: A Review of Data and Analyses

2012 ◽  
Vol 11 (4) ◽  
pp. vzj2011.0178 ◽  
Author(s):  
Karl Vanderlinden ◽  
Harry Vereecken ◽  
Horst Hardelauf ◽  
Michael Herbst ◽  
Gonzalo Martínez ◽  
...  
Keyword(s):  
Soil Water ◽  
Temporal Stability ◽  
Water Contents ◽  
Soil Water Contents

scholarly journals The Effect of Irrigation Rate on the Water Relations of Young Citrus Trees in High-Density Planting

2021 ◽  
Vol 13 (4) ◽  
pp. 1759
Author(s):  
Said A. Hamido ◽  
Kelly T. Morgan
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Soil Salinity ◽  
Planting Density ◽  
Stem Water Potential ◽  
Irrigation Rate ◽  
Biological Stress ◽  
Stem Water ◽  
Water Contents ◽  
Soil Water Contents

The availability and proper irrigation scheduling of water are some of the most significant limitations on citrus production in Florida. The proper volume of citrus water demand is vital in evaluating sustainable irrigation approaches. The current study aims to determine the amount of irrigation required to grow citrus trees at higher planting densities without detrimental impacts on trees’ water relation parameters. The study was conducted between November 2017 and September 2020 on young sweet orange (Citrus sinensis) trees budded on the ‘US-897’ (Cleopatra mandarin x Flying Dragon trifoliate orange) citrus rootstock transplanted in sandy soil at the Southwest Florida Research and Education Center (SWFREC) demonstration grove, near Immokalee, Florida. The experiment contained six planting densities, including 447, 598, and 745 trees per ha replicated four times, and 512, 717, and 897 trees per ha replicated six times. Each density treatment was irrigated at 62% or 100% during the first 15 months between 2017 and 2019 or one of the four irrigation rates (26.5, 40.5, 53, or 81%) based on the calculated crop water supplied (ETc) during the last 17 months of 2019–2020. Tree water relations, including soil moisture, stem water potential, and water supplied, were collected periodically. In addition, soil salinity was determined. During the first year (2018), a higher irrigation rate (100% ETc) represented higher soil water contents; however, the soil water content for the lower irrigation rate (62% ETc) did not represent biological stress. One emitter per tree regardless of planting density supported stem water potential (Ψstem) values between −0.80 and −0.79 MPa for lower and full irrigation rates, respectively. However, when treatments were adjusted from April 2019 through September 2020, the results substantially changed. The higher irrigation rate (81% ETc) represented higher soil water contents during the remainder of the study, the lower irrigation rate (26.5% ETc) represents biological stress as a result of stem water potential (Ψstem) values between −1.05 and −0.91 MPa for lower and higher irrigation rates, respectively. Besides this, increasing the irrigation rate from 26.5% to 81%ETc decreased the soil salinity by 33%. Although increasing the planting density from 717 to 897 trees per hectare reduced the water supplied on average by 37% when one irrigation emitter was used to irrigate two trees instead of one, applying an 81% ETc irrigation rate in citrus is more efficient and could be managed in commercial groves.

Soil aggregate breakdown in a field experiment with different rainfall intensities and initial soil water contents

2017 ◽  
Vol 68 (6) ◽  
pp. 853-863 ◽  
Author(s):  
P. Shi ◽  
S. Thorlacius ◽  
T. Keller ◽  
M. Keller ◽  
R. Schulin
Keyword(s):  
Field Experiment ◽  
Soil Water ◽  
Soil Aggregate ◽  
Aggregate Breakdown ◽  
Initial Soil ◽  
Water Contents ◽  
Soil Water Contents

Technological and agronomic assessment of a Variable Rate Irrigation system integrated with soil sensor technologies

2017 ◽  
Vol 8 (2) ◽  
pp. 564-568 ◽  
Author(s):  
M. Martello ◽  
A. Berti ◽  
G. Lusiani ◽  
A. Lorigiola ◽  
F. Morari
Keyword(s):  
Irrigation System ◽  
Irrigation Performance ◽  
Variable Rate ◽  
Management Zones ◽  
Soil Moisture Sensors ◽  
First Results ◽  
Potential Benefits ◽  
Noticeable Reduction ◽  
Business As Usual ◽  
Variable Rate Irrigation

The main goal of this study was assessing the technological and agronomic performances of a centre pivot Variable Rate Irrigation (VRI) system. The study was conducted in 2015 on a 16-ha field cultivated with maize. Irrigation was scheduled in three Management Zones according to data provided by a real-time monitoring system based on an array of soil moisture sensors. First results demonstrated the potential benefits of the VRI system on irrigation performance however a multiyear comparison is requested for evaluating the response to climate variability. VRI resulted in yields comparable to the business-as-usual regime but through a noticeable reduction in irrigation volumes.

MITIGATION YIELD SCALED METHANE EMISSION FROM RICE GROWN IN WATER STRESS CONDITIONS WITH BIOCHAR AND SILICATE AMENDMENTS

2021 ◽  
Author(s):  
MUHAMMAD ASLAM ALI ◽  
SANJIT CHANDRA BARMAN ◽  
MD. ASHRAFUL ISLAM KHAN ◽  
MD. BADIUZZAMAN KHAN ◽  
HAFSA JAHAN HIYA
Keyword(s):  
Water Stress ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Field Capacity ◽  
Saturated Soil ◽  
Rice Grain ◽  
Standing Water ◽  
Water Contents ◽  
Soil Water Contents

Climate change and water scarcity may badly affect existing rice production system in Bangladesh. With a view to sustain rice productivity and mitigate yield scaled CH4 emission in the changing climatic conditions, a pot experiment was conducted under different soil water contents, biochar and silicate amendments with inorganic fertilization (NPKS). In this regard, 12 treatments combinations of biochar, silicate and NPKS fertilizer along with continuous standing water (CSW), soil saturation water content and field capacity (100% and 50%) moisture levels were arranged into rice planted potted soils. Gas samples were collected from rice planted pots through Closed Chamber technique and analyzed by Gas Chromatograph. This study revealed that seasonal CH4 emissions were suppressed through integrated biochar and silicate amendments with NPKS fertilizer (50–75% of the recommended doze), while increased rice yield significantly at different soil water contents. Biochar and silicate amendments with NPKS fertilizer (50% of the recommended doze) increased rice grain yield by 10.9%, 18.1%, 13.0% and 14.2%, while decreased seasonal CH4 emissions by 22.8%, 20.9%, 23.3% and 24.3% at continuous standing water level (CSW) (T9), at saturated soil water content (T10), at 100% field capacity soil water content (T11) and at 50% field capacity soil water content (T12), respectively. Soil porosity, soil redox status, SOC and free iron oxide contents were improved with biochar and silicate amendments. Furthermore, rice root oxidation activity (ROA) was found more dominant in water stress condition compared to flooded and saturated soil water contents, which ultimately reduced seasonal CH4 emissions as well as yield scaled CH4 emission. Conclusively, soil amendments with biochar and silicate fertilizer may be a rational practice to reduce the demand for inorganic fertilization and mitigate CH4 emissions during rice cultivation under water stress drought conditions.

scholarly journals Effect of Nano-Carbon on Water Holding Capacity in a Sandy Soil of the Loess Plateau

2017 ◽  
Vol 21 (4) ◽  
pp. 189-195 ◽  
Author(s):  
Beibei Zhou ◽  
Xiaopeng Chen
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Loess Plateau ◽  
Sandy Soil ◽  
Water Retention ◽  
Soil Mixture ◽  
Cumulative Infiltration ◽  
Nano Carbon ◽  
Water Contents ◽  
Soil Water Contents

The poor water retention capacity of sandy soils commonly aggregate soil erosion and ecological environment on the Chinese Loess Plateau. Due to its strong capacity for absorption and large specific surface area, the use of nanocarbon made of coconut shell as a soil amendment that could improve water retention was investigated. Soil column experiments were conducted in which a layer of nanocarbon mixed well with the soil was formed at a depth of 20 cm below the soil surface. Four different nanocarbon contents by weight (0%, 0.1%, 0.5%, and 1%) and five thicknesses of the nanocarbon- soil mixture layer ranging from 1 to 5 cm were considered. Cumulative infiltration and soil water content distributions were determined when water was added to soil columns. Soil Water Characteristic Curves (SWCC) were obtained using the centrifuge method. The principal results showed that the infiltration rate and cumulative infiltration increased with the increases of nanocarbon contents, to the thicknesses of the nano carbon-soil mixture layer. Soil water contents that below the soil-nano carbon layer decreased sharply. Both the Brooks-Corey and van Genuchten models could describe well the SWCC of the disturbed sandy soil with various nano carbon contents. Both the saturated water content (θs), residual water content (θr) and empirical parameter (α) increased with increasing nano carbon content, while the pore-size distribution parameter (n) decreased. The available soil water contents were efficiently increased with the increase in nanocarbon contents.

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