نتایج جستجو برای: texture of soil
تعداد نتایج: 21188303 فیلتر نتایج به سال:
The root-knot nematode, Meloidogyne incognita, and the soilborne fungus Thielaviopsis basicola, the causal agent of black root-rot, are important plant pathogens of cotton in Arkansas. When M. incognita and T. basicola occur in the same field, greater damage may occur on cotton than when only one of the pathogens is present. Studying the relationship of soil factors on M. incognita Monfort et a...
abstract soil invertebrate and their spatial pattern are affected strongly by environmental factors. spatial variability of soil properties is one of the most important reasons of the macrofauna variability. this study was conducted to investigate the spatial variability of soil properties and soil macrofauna biomass in the riparian forest landscape of karkhe river. soil macro fauna were sample...
The tubers of Bongardia chrysogonum, belonging to to Podophyllaceae, are rich in alkaloids. In this study, total alkaloid content of the tubers of this plant in Naghadeh, Zanjan and Boukan were determined by spectrophotometeric method. In addition, the effects of soil characteristics such as total nitrogen, potassium, pH, soil texture and tubers nitrate levels on the plant total alkaloid conten...
A geo-statistics method combined with GIS was applied to study the soil special variation characteristics of a typical basin on the Northwestern Plateau of Hebei Province. It indicates that the rational crop layout is determined by the soil texture. And the crop layout optimization schemes were put forward for different production objectives based on the GIS platform with the soilcrops special ...
Australia's "Direct Action" climate change policy relies on purchasing greenhouse gas abatement from projects undertaking approved abatement activities. Management of soil organic carbon (SOC) in agricultural soils is an approved activity, based on the expectation that land use change can deliver significant changes in SOC. However, there are concerns that climate, topography and soil texture w...
centration. We did this because it is well established that the FC is driven by soil texture. However, to avoid confusion and to focus on our findings we removed the term “soil texture” when explaining the driving factors and used FC only. We remind that field capacity (crosses in Figure 4) were determined with the measurements of the matric potential and soil moisture from the relevant depth (...
Study of sedimentation trend in artificial recharge projects and flood spreading on the aquifer (Aquifer management) can be effective in designing structures and network management. Literature review shows that most studies in the flood spreading area shave been conducted in networks that have a low life span or low flood numbers. Since 1997, the flood spreading station on the Jajarm aquif...
the current research was carried out to find out the most effective environmental factors in plant species occurrence by classification and ordination methods. for this purpose, the study was conducted in nir rangelands of yazd province and topography, climate, soil and grazing intensity data of the region were determined. sampling method was randomized–systematic and within each sampling unit ...
Using seasonal floods is very important in arid and semi arid areas. Suspended sediments in the flood are caused changes in soil properties. The aim of this study is to investigate the soil chemical and physical properties affected by low quality floods irrigation. Sampling from three phases, in each phase three points (beginning, middle and end of the row) and in the depths of 30-0, 60-30 and ...
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