نتایج جستجو برای: sodic and potassic
تعداد نتایج: 16827348 فیلتر نتایج به سال:
Soil salinity due to irrigation is a major constraint agriculture, particularly in arid and semi-arid zones, water scarcity high evaporation rates. Reducing fundamental objective for protecting the soil supporting agricultural production. The present study aimed empirically measure simulate with model, reduction Vertisol by cultivation of Echinochloa stagnina. Laboratory column experiments were...
High contents of soluble salts accumulated in a soil can significantly decrease the value and productivity of agricultural lands. Present recommendations for reclamation are usually based only on relatively simple and often empirical relations. In this paper we give a brief overview of many unique physical and chemical factors important to reclamation contained in the one-dimensional multicompo...
Present study was carried out to assess the effects of soil salinity/sodicity on mineral nutrient status Urochondra setulosa, Leptochloa fusca and Sporobolus marginatus at ICAR- Central Soil Salinity Research Institute, Karnal, Haryana during 2016–19. Treatments (pH ~ 9.5, pH 10, ECe 30 dS/m, 40 dS/m 50 dS/m) were created in microplots (2.5 m × 1.5 0.5 m) using saline/sodic water. Na+ Cl– conte...
The study area is located about 45 km of southwest Neyshabour and east of Arghash village. Both intrusive and volcanic rocks are exposed in the study area and they are intensively altered due to hydrothermal fluid. The alteration zoning in the study area consists of potassic, sericitic, carbonatization, silicification and propylitic. More than 10 intrusive rocks with composition in the range of...
In this paper, we aim to achieve two specific objectives. The first one is to examine the applicability of wavelet neural network (WNN) technique in ore grade estimation, which is based on integration between wavelet theory and Artificial Neural Network (ANN). Different wavelets are applied as activation functions to estimate Cu grade of borehole data in the hypogene zone of porphyry ore deposi...
A swarm of minette and melanephelinite dikes is exposed over 2500 km 2 in and near the Wasatch Plateau, central Utah, along the western margin of the Colorado Plateaus in the transition zone with the Basin and Range province. To date, 110 vertical dikes in 25 dike sets have been recognized. Strikes shift from about N80øW for 24 Ma dikes, to about N60øW for 18 Ma, to due north for 8-7 m.y. These...
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