Results 221 to 230 of about 490,182 (265)

Corn response to tillage and water table depth

Journal of Soil and Water Conservation, 2012
WITHIN-FIELD VARIATIONS OF MIDWEST CORN YIELDS AND PROBABLE CAUSES Yields in some sections of fields are commonly less than half of those in the best sections, as illustrated in figure 1, which shows corn yields in 2010 measured along two transects across a 10 ha (25 ac) field in Winnebago County, Wisconsin. These large yield differences are surprising
W. Doral Kemper, Charles E. Bongert, Daniel M. Marohn   +2 more
openaire   +1 more source

Depth to Ground-Water Table by Remote Sensing

Journal of the Irrigation and Drainage Division, 1971
This study is aimed at investigating the potential of IR imagery, as a remote sensing technique, in detecting and surveying depth to ground-water table. This was accomplished by studying the variation of soil radiant energy from two types of soils in the 8 μ–14μ infrared spectral band as affected by depth to ground-water table in a specially designed ...
Mohamed Abdel-Hady, Harlan H. Karbs
openaire   +1 more source

Soil porosity in a peach orchard as influenced by water table depth

Agricultural Water Management, 1989
Abstract The objective of the study was to investigate modifications induced in soil porosity, pore shape, and pore size distribution in a peach orchard field experiment caused by different levels of shallow water table. Pores larger than 30 μm were measured on soil thin sections using the electro-optical image-analysis (Quantimet 720) technique; the
PAGLIAI M, PEZZAROSSA B, ZERBI G, ALVINO D, PINI R, VIGNA GUIDI G   +5 more
openaire   +3 more sources

MEASUREMENT OF DEPTH TO WATER TABLE IN A HEAVY CLAY SOIL

Soil Science, 1980
ABSTRACTWe observed water tables in a heavy clay soil using: (1) a 1.2-m deep perforated pipe; (2) two series of shallow, unlined boreholes to depths of 30 and 50 cm below the surface; and (3) one series of piezometers to 30 cm. All holes had a diameter of 2 cm, as required in clay soils.
J. BOUMA, L. W. DEKKER, J. C. F. M. HAANS   +2 more
openaire   +1 more source

Convergence of carbon sink magnitude and water table depth in global wetlands

Ecology Letters, 2023
AbstractWetlands are strategic areas for carbon uptake, but accurate assessments of their sequestration ability are limited by the uncertainty and variability in their carbon balances. Based on 2385 observations of annual net ecosystem production from global wetlands, we show that the mean net carbon sinks of inland wetlands, peatlands and coastal ...
Jinquan Li, Mingkai Jiang, Junmin Pei, Changming Fang, Bo Li, Ming Nie   +5 more
openaire   +3 more sources

Soil Surface Evaporation and Water Table Depths

Journal of Irrigation and Drainage Engineering, 1983
The experiment was conducted in lysimeters for studying the evaporation from soil surface in relation to water table depth and standard pan evaporation. Dummy variables 1 and 0 were used as an alternative to analyze the variance and covariance to compare the soil surface evaporation difference between water table depths.
openaire   +1 more source

Effect of Study Duration on Measurements of Water Table Depths

Soil Science Society of America Journal, 1984
Abstract Water table depths and precipitation were measured over a 10‐yr period on four fine‐textured soils in central Ohio. Well, moderately well, poorly and very poorly drained soils were observed to compare the effect of study duration on water table depth measurements.
T. M. Zobeck, A. Ritchie
openaire   +1 more source

Sugarcane Responses to Water‐Table Depth and Periodic Flood

Agronomy Journal, 2010
Sugarcane (Saccharum spp.) is exposed to periodic floods and shallow water tables in Florida due to practices that reduce P discharge to the Everglades. This study examined the yields and juice quality of four sugarcane cultivars (CP 88‐1762, CP 89‐2143, CP 89‐2376, and CP 96‐1252) maintained at constant water‐table depths near 20 (20CWT) and 45 cm ...
Barry Glaz, Dolen R. Morris
openaire   +1 more source

Prediction of depth to water table in bauxite residue ponds

Australian Journal of Soil Research, 1979
Measurements were taken of the rate of water loss from the water table in columns of bauxite residue. The data were used to develop a simple model to predict the changes in depth to water table, using inputs of weekly rainfall and estimates of potential evaporation.
BA Carbon, AM Murray, GA Bartle
openaire   +1 more source

Influence of Water Table Depth on Pore Water Chemistry and Trihalomethane Formation Potential in Peatlands

Water Environment Research, 2016
ABSTRACT: Drained peatland catchments are reported to produce more colored, dissolved organic carbon (DOC)‐rich water, presenting problems for potable water treatment. The blocking of peatland drainage ditches to restore the water table is increasingly being considered as a strategy to address this deterioration in water quality. However, the effect of
Rachel, Gough, Peter J, Holliman, Nathalie, Fenner, Mike, Peacock, Christopher, Freeman   +4 more
openaire   +2 more sources