Poljoprivredna tehnika最新文献

Assessment of soil saturated hydraulic conductivity at VFSTR campus using DRI method 用DRI法评价VFSTR校园土壤饱和水导率

Poljoprivredna tehnika Pub Date : 2020-04-07 DOI: 10.5937/poljteh2001010i

Aminul Islam, Chandra Ravi Charyulu, R. Reddy

{"title":"Assessment of soil saturated hydraulic conductivity at VFSTR campus using DRI method","authors":"Aminul Islam, Chandra Ravi Charyulu, R. Reddy","doi":"10.5937/poljteh2001010i","DOIUrl":"https://doi.org/10.5937/poljteh2001010i","url":null,"abstract":"Study of soil hydraulc conductivity is the most important parameter for fluid flow and molecules transportation phenomena through the soil profile. The water reaches in the land surface in the form of precipitation and irrigation can flow over the ground, which eventually reaches in surface water body and flows through soil surface, contributes groundwater recharge. Estimation and evaluation of soil saturated hydraulic conductivity (Ks) are soil hydraulic properties that effect fluid flow ability through the soil medium which help to understand transmission properties and water balance in soils. The Green-Ampt (GA) model is best suited for infiltration on homogeneous, initially dry, rough and rough soils. The study is conducted to estimate steady state infiltration rate by using in-situ method named Double Ring Infiltrometer (DRI) and finding the spatial variation of infiltration rate and to estimate saturated hydraulic conductivity by using the Green-Ampt (G-A) model for 6 plots, having area 15m x 15m each at Vadlamudi willage, Guntur district, Andhra Pradesh (India). The experiment conducted areas A1, A2, A6 is having more bulk density because of organic compounds in that area having comparatively less infiltration rate than A3, A4, A5. Point A1 having less moisture content with soil bulk density 1.95 g/cm 3 and having a maximum infiltration rate of 4.2 cm/h. The average estimated Ks was found 0.95 cm/h from the experiment plot.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121215491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydraulic symbols - part four: Directional control valves 液压符号。第4部分:方向控制阀

Poljoprivredna tehnika Pub Date : 2019-12-12 DOI: 10.5937/poljteh1904001p

D. Petrović, V. Cerović

引用次数: 2

Evaluation of uniformity and water conveyance efficiency of spray tube irrigation system 喷管灌溉系统均匀性及输水效率评价

Poljoprivredna tehnika Pub Date : 2019-12-12 DOI: 10.5937/poljteh1904027r

Darko Ransford Opoku, Y. Shouqi, Liu Junping, Yan Haofang, Ibrahim Abindau

引用次数: 0

Smart solution for safe and long-lasting operation of agricultural equipment 智能解决方案，安全、持久运行的农业设备

Poljoprivredna tehnika Pub Date : 2019-12-12 DOI: 10.5937/poljteh1904017l

L. Magó

{"title":"Smart solution for safe and long-lasting operation of agricultural equipment","authors":"L. Magó","doi":"10.5937/poljteh1904017l","DOIUrl":"https://doi.org/10.5937/poljteh1904017l","url":null,"abstract":"Nowadays the increasing of the efficiency of agricultural production and the increasing of crop yields cannot be achieved without modern digital technology and smart machines that are a part of it. With the spread of precision agriculture and the digitalisation next to the power machines the attached equipment is becoming smarter and smarter. Through permanent technological and IT development, it became possible to thoroughly monitor and analyse operating functions and parameters not only for the most important power machines such as tractors, combines and other, but also there are existing solutions for measurement and related to that a collection and an analyse of data of specific utilisation parameters for other attached equipment. All of these processed data are essential for making well-considered actions related to the production technology and the machine operating. They help us to gain information about the quality of machine operations of the technology, the environmental factors, or even about the state of attached working equipment and machines. In this work, the vibration control system as smart solutions on the fail movers will be presented which are effective tools for the utilization of machines, for the precision machine work as well as for prolonging the machine life cycle.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125344178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the causes of erosion and solution: Case study Umuokoro Iowa, Ihitte/Uboma local government area, Imo State 侵蚀原因评价及解决办法:个案研究爱荷华州伊赫特/乌博马地方政府地区

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903078o

Oluwaseun Ojedele, A. Eke, P. Ehiomogue, N. Ezejiofor

{"title":"Evaluation of the causes of erosion and solution: Case study Umuokoro Iowa, Ihitte/Uboma local government area, Imo State","authors":"Oluwaseun Ojedele, A. Eke, P. Ehiomogue, N. Ezejiofor","doi":"10.5937/poljteh1903078o","DOIUrl":"https://doi.org/10.5937/poljteh1903078o","url":null,"abstract":"Erosion is a condition in which the surface of the earth declines gradually due to wearing away by the action of water, wind and human activities. This research was carried out to determine the types of erosion occurring in this area and provide proper erosion management techniques that will help to control the erosions occurring in this area. Erosion control techniques are used to prevent and reduce soil erosion. Visual examination, interviews from residents and measurement of measurement of the erosion to know the cause, nature and type of erosion at the sites were carried out. Results of visual examination and interviews revealed that the erosion was caused by abandoned road construction and poor land management practices of the residents. Measurements from site A, D and G at the month of May which were 0.28, 0.29 and 0.29 m in depth respectively showed that they have already degenerated from splash to rill and is gradually forming gully, while site B and C at the month of May which were 1.53 and 2.34 m in depth respectively were still active gullies. Site F and G have already degenerated from rill to gully and will be worse if nothing is done on time. Implementation of the solutions recommended like regarding and tarring the roads, planting vegetative covers and proper sensitization of the villagers is necessary to improve and maintain the environment.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133799063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of drying method on functional properties of Yam (Dioscorea sp.) flour 干燥方法对山药粉功能特性的影响

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903059o

Chineze Okeke, S. Oluka

{"title":"Effect of drying method on functional properties of Yam (Dioscorea sp.) flour","authors":"Chineze Okeke, S. Oluka","doi":"10.5937/poljteh1903059o","DOIUrl":"https://doi.org/10.5937/poljteh1903059o","url":null,"abstract":"The effect of drying method on functional properties of five different yam flour varieties namely, white yam, purple yam, yellow yam, water yam and three leaves yam were studied using oven, solar and sun drying method. The functional properties were determined using AACC approved method. Results revealed that White yam recorded wettability range of 173.22 – 181.31 secs while the purple yam had wettability range from 151.69 to 201 secs, the three leave Yam, had wettability range from 138.41 to 190.20 secs, the water yam and yellow yam recorded wettability range from 143.62 to 182.11 secs and 153.42 to 174.34 secs respectively. Result also indicated that white yam recorded water absorption capacity (WAC) range from134.32 to 146.11, while purple yam had WAC range from 134.32 to 145.46; three leave Yam, water yam and yellow yam recorded from 129.56 to 138.11, from 133.58 to 163.21 and from 128.34 to 143.88 respectively. Furthermore, white yam, purple yam, three leave yam, water yam and yellow yam respectively recorded swelling power range from 11.84 to 12.63, from 11.14 to 11.82, from 11.28 to 12.66, from 12.19 to 12.38 and from 11.68 to 11.96. The three leave yam recorded the highest water absorption capacity which makes it likely to have least shelf life stability as compared to others because of the ability of absorbing water from a humid atmosphere. Results of the analysis of variance (ANOVA) on the effect of drying methods on the functional properties of the yam varieties showed significant difference at 5% and 1% probability level while the yam varieties did not show any significant different on the functional properties of the yam flour varieties.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124992776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Basic soil tillage of perennial plantations with a rotary shovel 多年生人工林的旋转铲基本土壤耕作

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903034z

M. Živković, M. Oljaca, Vaso Komnenic, K. Gligorević, M. Drazic, M. Pajić

引用次数: 0

Effect of soil type on power and energy requirements of some selected agricultural field machinery in south-east Nigeria 尼日利亚东南部土壤类型对某些农用机械动力和能源需求的影响

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903069o

O. Oduma, I. S. Oluka

{"title":"Effect of soil type on power and energy requirements of some selected agricultural field machinery in south-east Nigeria","authors":"O. Oduma, I. S. Oluka","doi":"10.5937/poljteh1903069o","DOIUrl":"https://doi.org/10.5937/poljteh1903069o","url":null,"abstract":"The effect of soil type on power and energy requirements of some selected agricultural field machinery (plough, harrow, ridger, rotovator and planter) in south – east Nigeria were studied to enable farmers and users of the equipment select and match appropriately the size of implements and speed of operation to machine (tractor) size to improve the field capacitive performance of the machines based on soil types (clay – loam, loamy – sandy, and sandy – clay soil) in the study area. Results showed that plough recorded the highest fuel (energy) consumption rate of 21.60 l/ha to24.67 l/ha, followed by harrow with fuel consumption rate of 17.21 to 21.66 l/ha, rotovator (15.22 to 19.72 l/ha) and least was planter with fuel consumption rate range from 14.42 to 15.62 l/ha. The highest fuel consumption was recorded on clay-loam soil, followed by sandyclay and least was on loamy-sandy soil. The plough also had the highest draft force (10.8 kN/m), followed by the harrow and ridger with equal draft force of 10.5 kN/m, planter (8.4 kN/m) and the least was the rotovator with draft force of 5.1 kN/m. Furthermore, the plough gave the highest wheel slippage (15.7 %) followed by harrow (13.3 %), rotovator and planter with equal value of wheel slippage (12.8 %) and least was ridger with wheel slippage of 12.4 %. Sandy-clay soil recorded the highest tyre slippage for all the implements, followed by loamy-sandy and the least tyre slippage was recorded on clayloam soil. However, all the implements in different soils corded average wheel slippage below the top limit of wheel slippage (20 %), showing that the soils were trafficability.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127181897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The influence of the process of researching the electrical equipment of the Tractor in the competitive advantage 研究拖拉机电气设备在竞争优势中的影响

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903017b

Zlata Bracanović, V. Petrović, Branka Grozdanić, D. Borak

引用次数: 0

Agricultural field machinery selection and utilization for improved farm operations in South-East Nigeria: A review 尼日利亚东南部改善农场经营的农业田间机械选择和利用:综述

Poljoprivredna tehnika Pub Date : 2019-09-24 DOI: 10.5937/poljteh1903044o

O. Oduma, I. S. Oluka, R Nnaemeka Nwakuba, I Dilibe Ntunde

{"title":"Agricultural field machinery selection and utilization for improved farm operations in South-East Nigeria: A review","authors":"O. Oduma, I. S. Oluka, R Nnaemeka Nwakuba, I Dilibe Ntunde","doi":"10.5937/poljteh1903044o","DOIUrl":"https://doi.org/10.5937/poljteh1903044o","url":null,"abstract":"A review of agricultural field machinery selection and utilization for improved farm operations in South-east Nigeria was conducted. Proper selection and utilization of machinery effortlessly would boost up and optimize farm production by minimizing unnecessary breakdown/failure, energy and power losses and mismatching of implements to prime movers. These could only be achieved with the aid of performance data of the various field machinery. The review indicated that average performance efficiency of disc plough in South–East Nigeria was 87.11 %, whereas harrow, ridger, rotovator and planter were 86.32 %, 86.78 %, 87.14 % and 86.81 %, respectively. The review further revealed that most studies were focused on a few soil types with few field implements. It was also observed from the review that data obtained for performance of various field machinery vary from one region to another and from one soil type to the other due to variation in ecological soil conditions. Most studies reviewed did not consider the energy and power requirements of the machinery in operation. More so, variations in agro-ecological soil types and conditions require studies of different agricultural zones/areas to obtain data of the performance characteristics of agricultural field machinery that would guide farmers and users of agricultural field machinery in the selection of appropriate machines for their agricultural field operations in order to increase their production at reduced costs. Field test results of some farm machineries were also presented. Prospects for future work were suggested.","PeriodicalId":281326,"journal":{"name":"Poljoprivredna tehnika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127825710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3