Results 21 to 30 of about 1,129,410 (306)

Effects of Different Initial Values on the Simulation of Permafrost Hydrothermal Processes at Xidatan Station on the Three-River Regions

open access: yesGaoyuan qixiang, 2022
Different initial values have a profound impact on the simulation of the permafrost hydrothermal process.The observation data from the Xidatan Station in the permafrost region of the Three-river sources regions on the Qinghai-Xizang (Tibet) Plateau, CLM4.
Zihang CHEN   +5 more
doaj   +1 more source

The role of abscisic acid and water relations in drought responses of subterranean clover [PDF]

open access: yes, 1997
The role of water relations and abscisic acid (ABA) in the responses to drought were studied in a mediterranean forage crop, Trifolium subterraneum L. under field conditions.
Chaves, M   +3 more
core   +1 more source

Mechanical Characteristics of Rice Root–Soil Complex in Rice–Wheat Rotation Area

open access: yesAgriculture, 2022
In order to explore the mechanical characteristics of stubble breaking and provide a theoretical basis for the design of a stubble breaking and crushing blockage prevention device, an orthogonal test with three factors (water content, bulk weight, and ...
Huibin Zhu   +5 more
doaj   +1 more source

Experimental Study on Determining Unsaturated Property of Soil [PDF]

open access: yes, 1980
This paper deals with the experimental study of hydraulic properties of unsaturated soil. In treating unsaturated zone, a great deal more data are required than are required for the saturated zone, but these properties of soils must be known to apply the
Kono, Iichiro, Nishigaki, Makoto
core   +1 more source

Estimation of Soil Hydraulic Parameters with Measurment of Soil Water Content, Pressure Head or Measurment the Simultaneously by Inverse Method [PDF]

open access: yesعلوم و مهندسی آبیاری, 2014
Most processes of soil and water in the field occur in unsaturated conditions.In the field, It’s possible to estimate soil hydraulic properties by measurement of soil water content and soil water pressure head in different times, using inverse method. In
Maedeh MahmodianShoshtari   +2 more
doaj  

Experimental study on water transfer of soil-rock mixtures under freezing action

open access: yesYantu gongcheng xuebao
The frost-heaving failure of earth-rock dam slopes is mainly caused by the combined action of sand and gravel cushion, frost heaving of dam fills and water migration.
LI Zhuo 1, 2, JIANG Xin 3, ZHANG Jixun 3, ZHAO Yu 3, WANG Yuqing 3, LU Yang 3
doaj   +1 more source

Carbohydrates in hot water extracts of soil aggregates as affected by long-term management [PDF]

open access: yes, 2002
Microbial carbohydrates are immediate by-products of microbial metabolism and play an important role in the formation and stabilization of soil structure.
Cheshire M.V.   +5 more
core   +1 more source

Measuring very negative water potentials with polymer tensiometers: principles, performance and applications [PDF]

open access: yes, 2009
In recent years, a polymer tensiometer (POT) was developed and tested to directly measure matric potentials in dry soils. By extending the measurement range to wilting point (a 20-fold increase compared to conventional, water-filled tensiometers), a ...
Bakker, G.   +7 more
core   +5 more sources

Field Devices For Monitoring Soil Water Content

open access: yesEDIS, 2004
In the context of water management for irrigation, measuring and monitoring soil water status is an essential component of best management practices (BMPs) to improve the sustainability of agriculture. This document is Bulletin 343, one of a series from
Rafael Muñoz-Carpena
doaj   +5 more sources

Improving wheat yield and water use efficiency through soil water-guided furrow irrigation and hydraulic simulation

open access: yesAgricultural Water Management
Despite the increasing adoption of precision irrigation technologies including drip and sprinkler systems, traditional methods such as furrow irrigation remain widely used among small-scale farmers due to their lower costs and simpler management ...
Dong-Hyeon Kim   +3 more
doaj   +1 more source

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