نتایج جستجو برای: rill indicator 567 tonha

تعداد نتایج: 77548  

Journal: :Jurnal media pertanian 2022

Increasing production and productivity of shallots currently must be done by expanding the area shallot planting. The expansion planting in Jambi is constrained Ultisol land which has low soil fertility. This study aims to look at response application cow dung trichocompost doses, get a dose will provide most effective growth yield shallots. research design used was randomized block (RBD) with ...

Journal: :Jurnal media pertanian 2022

This study aimed to examine the effect of vermicompost in increasing melon growth and yield obtain a dose that was able provide best yield. The research design used Randomized Block Design (RBD) with one factor, namely consisting of: 0 tonha-1; 5 15 25 35 tonha-1. results showed application increased plant length, number leaves, leaf area, stem diameter, fruit weight per plants. gave tonha-1, 1...

2004
RAFAEL GIMÉNEZ OLIVIER PLANCHON NORBERT SILVERA GERARD GOVERS

Present-day understanding of rill dynamics is hampered by a lack of detailed data on velocity distributions in rills. The latter are difficult to collect with traditional techniques due to the very low water depths and the relatively high flow velocities in rills. The objectives of this paper were to investigate the feasibility of miniaturized acoustic Doppler velocimeter (mADV) measurements in...

2005
G. A. Mancilla S. Chen D. K. McCool

This research focused on rill formation, rill density, and associated flow velocity distribution in rills at the field level and with different tillage treatments in the inland Pacific Northwest. The study was conducted by applying flow at three different rates under winter conditions, which provides the greatest potential for rill formation. The following tillage treatments were tested: chisel...

2015
Yuhan Huang Xiaoyan Chen Banglin Luo Linqiao Ding Chunming Gong Chiyuan Miao

Experimental studies provide a basis for understanding the mechanisms of rill erosion and can provide estimates for parameter values in physical models simulating the erosion process. In this study, we investigated sediment delivery during rill erosion in purple soil. We used the volume-replacement method to measure the volume of eroded soil and hence estimate the mass of eroded soil. A 12 m ar...

2014
Xiao-Yan Chen Yu Zhao Bin Mo Hong-Xing Mi

Rill erosion is an important process that occurs on hill slopes, including sloped farmland. Laboratory simulations have been vital to understanding rill erosion. Previous experiments obtained sediment yields using rills of various lengths to get the sedimentation process, which disrupted the continuity of the rill erosion process and was time-consuming. In this study, an improved experimental m...

Journal: :مرتع و آبخیزداری 0
نیره غضنفرپور دکتری دانشکدة منابع طبیعی دانشگاه تهران سادات فیض نیا استاد گروه احیای مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران حسن احمدی استاد گروه احیای مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران محمد جعفری استاد گروه احیای مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران مسعود نصری استادیار دانشگاه آزاد اسلامی، واحد اردستان

estimation of the amount of soil loss measurement of field indicators is a low-cost method, is easy to learn and can be simply applied. in order to measure and make assessment of soil loss amount by field indicators method in shahrak watershed, first map of the work units was prepared and then, measurements of the relevant field indicators were carried out within these units. then, epm model wa...

2008
C. Yao T. Lei W. J. Elliot D. K. McCool J. Zhao S. Chen

Quantifying critical conditions of rill formation can be useful for a better understanding of soil erosion processes. Current studies lack a consensus and related rationale on how to describe these conditions. This study was based on the concepts that (1) the shear stress available for erosion at any given point is a function of the runoff rate, the slope steepness, and hydraulic characteristic...

Journal: :Archives of crop science 2023

Abstract Sorghum is an important food security crop in Ethiopia. As the grain preferred for biomass equally farmers to use it as animal food. It a major lowland parts of eastern Amhara environment area best fits crop. The study was conducted with objective identifying high yielder and adaptable sorghum varieties moisture deficit areas region. Eleven genotypes including two checks were evaluated...

ژورنال: علوم آب و خاک 2022

This study was conducted to investigate the temporal variations of runoff and rill erosion in various soil textures under different slope gradients. So, a laboratory experiment was set up in three soil textures (loam, clay loam, and sandy clay loam) and four slope gradients (5, 10, 15, and 20%) using the completely randomized design with three replications. Runoff production and rill erosion we...

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