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Sm150t

Manufactured by Delta-T Devices
Sourced in United Kingdom

The SM150T is a portable soil moisture sensor developed by Delta-T Devices. It provides accurate measurements of volumetric soil water content. The device uses Time Domain Transmission (TDT) technology to determine the soil moisture level.

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4 protocols using sm150t

1

Comprehensive Soil Analysis Protocol

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A prominence HPLC instrument (Shimadzu, Kyoto, Japan) was used for chromatographic purification. A Nexera X2 HPLC/UHPLC system (Shimadzu, Japan) was employed for the quantitative analysis. An amaZon speed-ion trap mass spectrometer (Bruker, Billerica, MA, USA) and an AVANCE-I 600 NMR (Bruker) were used for chemical identification. A Yamanaka-type soil hardness tester from Fujiwara Seisakusho, Ltd. (Tokyo, Japan) and soil moisture sensor kit SM150T from Delta-T Devices (Cambridge, UK) were used for the in-situ soil analysis.
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2

Soil Analysis and Plant Characterization

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During the field survey, soil pH and bearing capacity and soil moisture levels were measured using a conventional pH meter, a Yamanaka-type soil hardness tester (Fujiwara Seisakusho, Ltd., Tokyo, Japan), and a soil moisture sensor kit (SM150T, Delta-T Devices, Cambridge, UK). The recordings of all 37 plant locations are listed in Table 4.
The collected soil samples were analyzed using a soil analyzer (EW-THA1J, Air Water Biodesign Co., Ltd., Kobe, Hyogo-Pref., Japan), and the resulting macronutrient values are shown in Table 1.
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3

Multi-Instrument Analysis of Soil Samples

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The EYELA multi-shaker MMS-type and centrifugal evaporators were obtained from Tokyo Rika Kikai (Tokyo, Japan) and Sakuma Seisakusho Co., Ltd. (Tokyo, Japan). A SpectraMax iD5 microplate reader (Molecular Devices, San Jose, CA, USA) was used for the in vitro assays. A Nexera X2 HPLC/UHPLC system (Shimadzu, Kyoto, Japan) was used for quantitative chromatographic analysis. A Bruker amaZon Speed Ion-Trap Mass Spectrometer (Billerica, MA, USA) was used for chemical identification. For the in situ soil analysis, a soil moisture sensor kit SM150T (Delta-T Devices, Cambridge, UK) and a Yamanaka-type soil hardness tester (Fujiwara Seisakusho, Tokyo, Japan) were used. Soil macronutrients were analyzed using an EW-THA1J soil analyzer (Air Water Biodesign, Osaka, Japan).
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4

Prolonged Dry Season Simulation

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In order to simulate a prolonged dry season, in five pairs of plots (2.5 × 2.5 m) one plot each was covered by a translucent plastic tarpaulin (3 × 3 m) to create a roof at 1.5 m above the soil surface reducing precipitation by 100%. These plots served as "rain-exclusion", while the other plot within each pair served as uncovered "control". The tarpaulins were installed on
taken with a dielectric soil moisture sensor, with general mineral soil calibration, at a depth of 5 cm (SM150T, Delta-T Devices, England). Simultaneously, soil surface temperature was recorded with a thermometer at a depth of 10 cm (HI 98501, Hanna instruments, USA). For further details on the experimental design see Bréchet et al. (2019) .
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