1- Introduction The sediment cores BAG, AZD and AM in the Babolsar, Jouybar and Zaghmarz areas are located at the southern Iranian part of the coastal plain of the Caspian Sea. These areas are contained by major mountain ridge, the Alborz in the south (Central Alborz Structural Zone). The Alborz Mountain represent the main source of terrigenous materials in the South basin of the Caspian Sea. ...

The objective of this study was to determine the effects of water regime/soil condition (continuous flooding, saturated, and aerobic), cultivar ('Cocodrie' and 'Rondo'), and soil texture (clay and sandy loam) on rice grain yield, yield components and water productivity using a greenhouse trial. Rice grain yield was significantly affected by soil texture and the interaction between water regime ...

A textural classification of sediments collected in input channels, shallow lagoon beds and navigation channels of the Lagoon of Venice is presented. Some variables describing both the hydrodynamics and the transport time scales of the Lagoon are compared with bottom sediment distribution inside the basin. A high correlation between residence time (REST) and the silt fraction (4-31 μm) was only...

The article considers the possibility of using wastepaper sludge ash (WSA) as a soil reinforcement material for construction layers road wear. Loamy sand, sandy loam, silty clay were chosen soils strengthening. maximum density skeleton at optimum humidity was established by method Proctor. Wastepaper and Portland cement grade 400 used separately Six compositions strengthened each type investiga...

Soybean is highly sensitive to drought stress during its flowering period. Heinong84 (HN84) and Hefeng46 (HF46) were planted in clay loam, silty sandy clay. We studied the effects of on content membrane lipid peroxides soybean leaves, activity antioxidant enzymes, key enzymes nitrogen metabolism under different soil conditions. Our results showed that had clear physiological responses stress. W...

Currently, over half of China’s trunk railways are located in permafrost regions. But to tackle the railway subgrade disease has always been the difficulty in the railway construction there. The influence that the dynamics performance of frozen silty clay has on permafrost subgrade is an important component in the researches towards permafrost subgrade. In this paper, the dynamics performance o...

The coastal area of the Ma river delta is formed by interaction continental and marine processes, between neo-tectonic activities exogenous natural factors human during Late Holocene. Using remote sensing geoscience research methods (granulometry, paleontology, geochemistry, clay mineralogy) geomorphological studies (geneses, morphology, dynamics) combined with field survey, this area, except d...

the purpose of the present research was to study the properties of natural habitats and growth status of the genus tamarix in miankangi, sistan province, south-eastern iran. selective sampling was used to examine the natural stands structure. then, the one ha-rectangular sample plots were stablished in the stands and surrounding bare lands as control plots. quantitative variables of stands viz....

Abstract Karkheh river’s Delta is located in the west of Khuzestan Plain and can be divided into two smaller deltas; northern delta named as (including Bostan, Sableh Neisan Deltas) southern -e- Noor Delta. Based on Galloway7 classification, river-dominated type (type 1). Considering activity, this to parts; an active part north inactive south. Orton Reading 16 placed fine-grained (muddy) categ...

Significantly more occlusion bodies (OB) of DuPont viral construct HzSNPV-LqhIT2, expressing a scorpion toxin, were transported by artificial rainfall to cotton plants from sandy soil (70:15:15 sand-silt-clay) than from silt (15:70:15) and significantly more from silt than from clay (15:15:70). The amounts transported by 5 versus 50 mm of precipitation were the same, and transport was zero when...