Measurement of Soil Moisture Deficit by Neutron Moderation under Two Densities of Sugar Beet with and without Irrigation

1973 ◽  
pp. 309-314
Author(s):  
A. P. Draycott
Keyword(s):  
Soil Moisture ◽  
Sugar Beet ◽  
Soil Moisture Deficit ◽  
Neutron Moderation ◽  
Moisture Deficit

Experiments on irrigation of sugar beet

1952 ◽  
Vol 42 (3) ◽  
pp. 286-292 ◽  
Author(s):  
H. L. Penman
Keyword(s):  
Soil Moisture ◽  
Sugar Beet ◽  
Field Experiments ◽  
Field Capacity ◽  
Growing Season ◽  
Maximum Growth ◽  
Weather Data ◽  
Soil Moisture Deficit ◽  
Basic Principles ◽  
Moisture Deficit

It is assumed that maximum growth requires maximum transpiration, and that maximum transpiration can be maintained by keeping the soil near to field capacity throughout the growing season. Transpiration rates can be calculated from weather data (the basic principles are outlined and an example of the calculation given), and the paper describes four field experiments in which attempts were made to control the water content of the soil throughout the growing season, by irrigation from overhead spray-lines.In spite of differences in season and soil, the four sets of data are consistent in showing that maximum sugar yield is obtained when the soil-moisture deficit (amount of rain or irrigation needed restore the soil to field capacity) does not exceed about 2 in. in mid-July, or about 4 in. in mid-September.

Effects of nitrogen fertilizer, plant population and irrigation on sugar beet: III. Water consumption

1971 ◽  
Vol 76 (2) ◽  
pp. 277-282 ◽  
Author(s):  
A. P. Draycott ◽  
M. J. Durrant
Keyword(s):  
Soil Moisture ◽  
Sugar Beet ◽  
Water Consumption ◽  
Large Population ◽  
Small Population ◽  
Plant Population ◽  
Soil Moisture Deficit ◽  
Plant Populations ◽  
Moisture Deficit ◽  
The Difference

SUMMARYA neutron moderation meter was used to measure soil moisture 0–4 feet deep in plots of sugar beet carrying two plant populations (8800 and 54000 plants/acre), each with and without irrigation. Recordings began in April or May in each of three years (1967–9) after sowing the crop and continued at 1 or 2-;week intervals until harvest in October.The measured soil moisture deficits were very similar to potential deficits calculated from meteorological measurements. This indicates that the crop could extract the water needed for transpiration from the soil even when the deficits were quite large (more than 5 in in 1967), which probably explains the small response to irrigation by sugar beet in England.When the soil moisture deficit increased rapidly early during the season (1967), the crop extracted water from the soil by exhausting the available water from progressively deeper horizons, whereas when the deficit increased rapidly late during the season (1969) water was still being extracted from all horizons until harvest. Both decreasing the plant population and irrigating decreased the amount of water used from depth in the profile every year.The total amount of water used (evaporation plus transpiration), on average, from soil reserves and rainfall, was 12·2 in by the small population and 13·4 in by the large population. When irrigated, the consumption increased to 14·2 and 15·4 in. respectively. The difference in usage between populations was almost entirely from the difference in leaf cover early during the season. The water consumption in 1968, when the summer was wet, was only two-thirds of that in 1967 and 1969 when the summers were drier.

Ozone and Soil Moisture Deficit Effects on Nitrogen Metabolism of Soybean 1

Crop Science ◽  
1987 ◽  
Vol 27 (6) ◽  
pp. 1177-1184 ◽  
Author(s):  
R. B. Flagler ◽  
R. P. Patterson ◽  
A. S. Heagle ◽  
W. W. Heck
Keyword(s):  
Soil Moisture ◽  
Nitrogen Metabolism ◽  
Soil Moisture Deficit ◽  
Moisture Deficit

scholarly journals Using Plant Temperature to Evaluate the Response of Stomatal Conductance to Soil Moisture Deficit

Forests ◽  
2015 ◽  
Vol 6 (12) ◽  
pp. 3748-3762 ◽  
Author(s):  
Ming-Han Yu ◽  
Guo-Dong Ding ◽  
Guang-Lei Gao ◽  
Yuan-Yuan Zhao ◽  
Lei Yan ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Stomatal Conductance ◽  
Soil Moisture Deficit ◽  
Moisture Deficit

Surface soil moisture deficit assessment based on satellite data

2021 ◽  
Author(s):  
L. Pidgorodetska ◽  
Ya. Zyelyk ◽  
L. Kolos ◽  
O. Fedorov
Keyword(s):  
Soil Moisture ◽  
Satellite Data ◽  
Surface Soil ◽  
Surface Soil Moisture ◽  
Soil Moisture Deficit ◽  
Moisture Deficit

Abrupt shift to hotter and drier climate over inner East Asia beyond the tipping point

Science ◽  
2020 ◽  
Vol 370 (6520) ◽  
pp. 1095-1099 ◽  
Author(s):  
Peng Zhang ◽  
Jee-Hoon Jeong ◽  
Jin-Ho Yoon ◽  
Hyungjun Kim ◽  
S.-Y. Simon Wang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
East Asia ◽  
Tipping Point ◽  
Soil Drying ◽  
Soil Moisture Deficit ◽  
Surface Warming ◽  
The Past ◽  
Abrupt Shift ◽  
Moisture Deficit ◽  
East Asian Climate

Unprecedented heatwave-drought concurrences in the past two decades have been reported over inner East Asia. Tree-ring–based reconstructions of heatwaves and soil moisture for the past 260 years reveal an abrupt shift to hotter and drier climate over this region. Enhanced land-atmosphere coupling, associated with persistent soil moisture deficit, appears to intensify surface warming and anticyclonic circulation anomalies, fueling heatwaves that exacerbate soil drying. Our analysis demonstrates that the magnitude of the warm and dry anomalies compounding in the recent two decades is unprecedented over the quarter of a millennium, and this trend clearly exceeds the natural variability range. The “hockey stick”–like change warns that the warming and drying concurrence is potentially irreversible beyond a tipping point in the East Asian climate system.

scholarly journals A note on the Hybrid Soil Moisture Deficit Model v2.0

2015 ◽  
Vol 54 (2) ◽  
pp. 126-131 ◽  
Author(s):  
Rogier P.O. Schulte ◽  
Iolanda Simo ◽  
Rachel E. Creamer ◽  
Nicholas M. Holden
Keyword(s):  
Information System ◽  
Soil Moisture ◽  
Short Note ◽  
Soil Drainage ◽  
Topographic Wetness Index ◽  
Soil Moisture Deficit ◽  
Nutrient Emissions ◽  
Moisture Deficit ◽  
Wide Range ◽  
Soil Information

Abstract The Hybrid Soil Moisture Deficit (HSMD) model has been used for a wide range of applications, including modelling of grassland productivity and utilisation, assessment of agricultural management opportunities such as slurry spreading, predicting nutrient emissions to the environment and risks of pathogen transfer to water. In the decade since its publication, various ad hoc modifications have been developed and the recent publication of the Irish Soil Information System has facilitated improved assessment of the spatial soil moisture dynamics. In this short note, we formally present a new version of the model (HSMD2.0), which includes two new soil drainage classes, as well as an optional module to account for the topographic wetness index at any location. In addition, we present a new Indicative Soil Drainage Map for Ireland, based on the Irish Soil Classification system, developed as part of the Irish Soil Information System.

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