In a previous publication ^ the writers reported comparative studies of the effect of calcium hydrate (Ca(0H)2), calcium carbonate (CaCOa), and certain other compounds, when applied to infested soil, upon infection of cabbage by the clubroot organism {Plasmodiophora brassicae Wor.). It was shown that, in well-watered soil in the greenhouse, infection was reduced perceptibly when the reaction of...

Context: Spatial analysis of water quality was carried out on agricultural area from lowland watershed in Tana 2 and 4 - Madagascar. Purpose: It aims to determine spatial distribution alkalinity, salinity organic matter content. Methods: The zone subdivided into three plots P1, P2 P3 according soil type. Water sample taken 43 georeferenced points were intended for pH, Electrical Conductivity (C...

background: gavkhooni marsh is one of the most important marshes in iran. in the recent years, natural conditions of this marsh have been affected by agricultural and industrial activities in zayandehrood river catchment areas. this research was carried out in 2006 to assess some chemical parameters and the heavy metals concentration in water, soil, and plants in the area and to compare the res...

The experimental acidification of Lake 223 (Experimental Lakes Area, northwestern Ontario) with sulfuric acid in 1976-1983 allowed a detailed examination of the capacity of the lake to neutralize hydrogen ion. A whole-lake alkalinity and ion budget for Lake 223 showed that 6681% of the added sulfuric acid was neutralized by alkalinity production in the lake. Nearly 85% of in situ alkalinity pro...

Global emissions of atmospheric CO2 and tropospheric O3 are rising and expected to impact large areas of the Earth’s forests. While CO2 stimulates net primary production, O3 reduces photosynthesis, altering plant C allocation and reducing ecosystem C storage. The effects of multiple air pollutants can alter belowground C allocation, leading to changes in the partial pressure of CO2 (pCO2) in th...

Biochar (BC) application to soil suppresses emission of nitrous- (N2O) and nitric oxide (NO), but the mechanisms are unclear. One of the most prominent features of BC is its alkalizing effect in soils, which may affect denitrification and its product stoichiometry directly or indirectly. We conducted laboratory experiments with anoxic slurries of acid Acrisols from Indonesia and Zambia and two ...

Land suitability classification is important in planning and managing sustainable land use. Most approaches to land suitability analysis combine a large number of land and soil parameters, and are time-consuming and costly. In this study, a potentially useful technique (combined feature selection and fuzzy-AHP method) to increase the efficiency of land suitability analysis was presented. To thi...