The effect of water table management on water quality under sandy loam and clay loam soils at the farm scale

2012 ◽  
Author(s):  
C S Tan ◽  
H.Y.F Ng ◽  
T Q Zhang
Keyword(s):  
Water Quality ◽  
Water Table ◽  
Sandy Loam ◽  
Clay Loam ◽  
Effect Of Water ◽  
Farm Scale ◽  
Water Table Management

Effect of Water Table Management on Water Quality and Crop Yield at the Plot and Farm Scale Fields

2004 ◽  
Author(s):  
C.S. Tan ◽  
C.F. Drury ◽  
J.D. Gaynor ◽  
W.D. Reynolds ◽  
T.W. Welacky ◽  
...  
Keyword(s):  
Water Quality ◽  
Crop Yield ◽  
Water Table ◽  
Effect Of Water ◽  
Farm Scale ◽  
Water Table Management

Root Growth and Yield Response of Rainfed Lowland Rice to Planting Method

1987 ◽  
Vol 23 (3) ◽  
pp. 305-313 ◽  
Author(s):  
P. K. Sharma ◽  
S. K. De Datta ◽  
C. A. Redulla
Keyword(s):  
Root Growth ◽  
Grain Yield ◽  
Water Table ◽  
Sandy Loam ◽  
Lowland Rice ◽  
Yield Response ◽  
Clay Loam ◽  
Transplanted Rice ◽  
Rainfed Lowland ◽  
Loam Soil

SUMMARYField experiments were conducted on two soils (clay loam and sandy loam) with varying texture and water table depth to study the effects of two planting methods (dry seeding and transplanting) on the root growth and grain yield of rainfed lowland rice. About 75% of the roots were found in the top 10 cm soil. Root length density at the flowering stage and grain yield in the sandy loam soil, with a water table deeper than 1.5 m, were less in dry-seeded than in transplanted rice, probably because of the greater moisture stress in dry-seeded rice between late tillering and harvest. In the clay loam soil, with the water table mostly at the soil surface, there was no difference in grain yield between dry-seeded and transplanted rice.

Impacts of Soil Conditioners and Water Table Management on Phosphorus Loss in Tile Drainage from a Clay Loam Soil

2015 ◽  
Vol 44 (2) ◽  
pp. 572-584 ◽  
Author(s):  
T. Q. Zhang ◽  
C. S. Tan ◽  
Z. M. Zheng ◽  
T. W. Welacky ◽  
W. D. Reynolds
Keyword(s):  
Water Table ◽  
Tile Drainage ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Phosphorus Loss ◽  
Loam Soil ◽  
Water Table Management ◽  
Soil Conditioners

scholarly journals Keterkaitan Komunitas Makrozoobentos dengan Kualitas Air dan Substrat di Ekosistem Mangrove Taman Hutan Raya Ngurah Rai Bali

2017 ◽  
Vol 4 (2) ◽  
pp. 179
Author(s):  
Maria Ulfa ◽  
Pande Gde Sasmita Julyantoro ◽  
Alfi Hermawati Waskita Sari
Keyword(s):  
Water Quality ◽  
Sandy Loam ◽  
Diversity Index ◽  
Anthropogenic Activities ◽  
Quality Parameter ◽  
Water Quality Parameter ◽  
Major Influence ◽  
Clay Loam ◽  
Forest Park ◽  
Normal Limits

Ngurah Rai forest park located in two districts of Badung and Denpasar city which is as the main centre of anthropogenic activities. There is an estuary in this area that used as run off of those activities. This area faces directly into the ocean. Wastes from anthropogenic activities indirectly affected biotic and abiotic components such as water quality, substrate, and macrozoobenthos. This research aims to discover the community of macrozoobenthos and its relation to the water quality and substrate in Ngurah Rai forest park. This research used purposive sampling metode to determine of stations. Sampling was conducted at four different stations covering macrozoobenthos samples, measuring water quality (salinity, pH, DO, temperature, turbidity) and substrate samples. A total of 19 types of macrozoobenthos was found out of 5 classes, i.e. Polychaeta, Oligochaeta, Bivalves, Gastropods, and Crustaceans. The diversity index was categorized as low to moderate. The uniformity index value of community was categorized as balanced. The dominant index on the fourth station states that the level of dominance was categorized as low. Water quality parameter measurement results were still within normal limits, but the turbidity value of the first station exceeds the normal limits due to high content of organic matter. The substrate type at first station to fourth station were sandy clay loam, sandy loam, clay loam, and sandy loam respectively. Temperature, salinity, turbidity were the parameters that greatly affected the abundance of macrozoobenthos, while substrates such as sand and clay have a major influence on the abundance of macrozoobenthos.

Water Table Management Practice Effects on Water Quality

1992 ◽  
Vol 35 (3) ◽  
pp. 823-831 ◽  
Author(s):  
J. A. Wright ◽  
A. Shirmohammadi ◽  
W. L. Magette ◽  
J. L. Fouss ◽  
R. L. Bengtson ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Table ◽  
Management Practice ◽  
Practice Effects ◽  
Water Table Management

Simultaneous use of newly adopted simple sensors for continuous measurements of soil moisture and salinity

Soil Research ◽  
2003 ◽  
Vol 41 (2) ◽  
pp. 309 ◽  
Author(s):  
F. Konukcu ◽  
A. Istanbulluoglu ◽  
I. Kocaman
Keyword(s):  
Thermal Conductivity ◽  
Moisture Content ◽  
Water Content ◽  
Water Table ◽  
Arid Regions ◽  
Sandy Loam ◽  
Clay Loam ◽  
Evaporation Chamber ◽  
Wide Range ◽  
Semi Arid

Methods available to measure salinity and moisture content in arid and semi-arid regions are limited because of the high salinities and very wide range of water contents (i.e. from saturation near the water table to air dry in the evaporation front). This paper is focused on the instrumentation employed in monitoring salt and moisture profiles in a column study which has wide applicability in salinity research. Experiments were conducted in a specially designed evaporation chamber which provided high evaporative demand as experienced in arid and semi-arid regions. Intensively instrumented soil columns with a constant shallow saline water table were used. Moisture content was measured by thermal conductivity and salinity by 4-electrode probe. In each case, instruments were manufactured specifically for the purpose in order to provide the desired degree of spatial resolution. Two soil types, sandy loam and clay loam, were used. Results indicated that thermal-conductivity probes measured water content over a wide range from saturation to 0.16 m3/m3 for clay loam and to 0.09 m3/m3 for sandy loam soil with great sensitivity (R2 > 0.95) and were unaffected by salt accumulation. The 4-electrode probes provided reliable measurements (R2 > 0.95) of the salinity of the soil solution for the range relevant to agricultural application. However, the accuracy of the probe decreased with the decreases in the water content after permanent wilting point.

Effect of Water Table Management and Irrigation on Potato Yield

2012 ◽  
Vol 55 (6) ◽  
pp. 2175-2184 ◽  
Author(s):  
S. Satchithanantham ◽  
R. Sri Ranjan ◽  
B. Shewfelt
Keyword(s):  
Water Table ◽  
Potato Yield ◽  
Effect Of Water ◽  
Water Table Management
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