نتایج جستجو برای: 30 and soil saturation percentage 45
تعداد نتایج: 16960434 فیلتر نتایج به سال:
abstract this paper presents a quantitative account of vegetation–environmental factor relationships in arid rangelands. vegetation cover was recorded using braun-blanquet combined abundance-cover scale in each quadrat. within each quadrat, one profile was dug and soil samples being taken at 0-20cm and 20-100cm depths. under study physical-chemical characteristics included texture, lime, organi...
Aims: To study the phosphorus requirement of Rice - zero till maize (Zea mays L.) cropping system on productivity and soil available Phosphorus balance. Study Design: Randomized block design (two factors). Methodology: The field experiment was conducted for two consecutive years at College Agriculture, Rajendranagar, Hyderabad. Levels P2O5 (kg ha-1) applied to rice (5 levels) (3 respectively we...
water crisis is an important issue in arid regions like iran and has been exacerbated because of successive droughts recently. so the use of unconventional water is increasing in places where there is no good-quality water. one of these resources is urban wastewater that can provide nutrient for plant and if it has no negative impact on soil and water, it can be used for irrigation in de desert...
Expert assessments for crop and range productivity of very-large arid and semiarid areas worldwide are ever more in demand and these studies require greater sensitivity in delineating the different grades or levels of soil salinity. In conjunction with field study in arid southeastern Oregon, we assess the merit of adding decision-tree analysis (DTA) to a commonly used remote-sensing method. Ra...
The cultivation of cover crops under no-tillage systems can promote positive improvements in soil attributes and increases grain yield successor crops, such as soybeans. aim this work was to evaluate the evolution accumulation dry shoot phytomass autumn/winter their impact on agronomic performance soybean grown succession. Black oats (Avena strigosa), rye (Secale cereale) turnip (Raphanus sativ...
owing to the importance and necessity of identifying soil properties in arid rangeland management, and the variableeffects of different kinds of herbivores on soil, this study compares some of the physical and chemical properties ofsoil between two regions experiencing livestock and wildlife grazing in the desert rangelands of kalmand-bahadoranin yazd province. the key areas in two regions expe...
in order to sustainable use of rangelands, it is necessary to recognize water, soil, and vegetation cover and analyze their relationships. physical and chemical properties of soil are effective in distribution of plant species in local area. to determine the effects of some soil properties on species distribution of eurotia ceratoides and stipa barbata in baghedar summer region of bafgh, three ...
The effects of soil intrinsic properties on soil structural stability were evaluated. Soil samples (33 series) with wide ranges of properties and structural stability were collected from Hamadan province. Two structural stability indices were used: mean weight diameter (MWD) using Yoder method and De Leenheer-De Boodt index (DDI). Wetting pre-treatments (fast wetting to saturation and slow wett...
background and objectives:anionic polyacrylamide application as an organic conditioner alone or in combination with organic material, can improve soil properties. the objective of this study was to investigate the influence some organic conditioners on mean weight diameter (mwd) and dispersible clay percentage (dcp).materials and methods:soil samples collected from the top 30-cm layer of two lo...
An evaluation of physico-chemical properties 27 soil samples from 3 different blocks ie., Sahibganj, Borio and Taljhari Sahibganj district (Jharkhand) in depths (0–15, 15–30 30–45 cm) was carried out during 2022-2023. The present investigation objectified as determination Physico-chemical to analyse the fertility status with finding deficiency toxicity nutrients. Soil were analyzed using standa...
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