نتایج جستجو برای: tractor mounted penetrometer

تعداد نتایج: 23886  

2013
M. Naderi R. Alimardani R. Abbaszadeh H. Ahmadi

Many parameters such as dynamic load of tractor drive wheels influence the traction of tractors. An increase in dynamic load of drive wheel increases the net traction, but excess dynamic load decreases the tractive efficiency that must be avoided. Development of tractor-mounted implements due to good maneuvering and weight transfer from front axle to rear axle led to effective performance of tr...

2013
Derek Elsworth

Rate effects are examined in the steady pore pressure distribution induced as a result of penetration of standard and ball penetrometers. The incompressible flow field, which develops around the penetrometer is used to define the approximate soil velocity field local to the penetrometer tip. This prescribes the Lagrangian framework for the migration of the fluid saturated porous medium, definin...

2012
Diego L. Valera Jesús A. Gil-Ribes Juan Agüera

Variations in sinkage and cone index are of crucial importance when planning fieldwork, and for determining the trafficability of farm machinery. Many studies have highlighted the link between higher values of these parameters and dramatic decreases in crop yield. Variations in the dry bulk density and cone index of clayey soil in Southern Spain were measured following each of five successive p...

Journal: :Agricultural Science Digest - A Research Journal 2019

Journal: :INMATEH-Agricultural Engineering 2022

The productivity of machine-tractor units depends on the length idle move performed in headland. Analytical dependences for determining when making T-turns by a unit with mounted machine field irregular shape have been specified article. Five types considered two variants – open turn and closed turn. Each them is carried out directions motion. A total 20 turns described. methodology specific co...

Journal: :Chagyo Kenkyu Hokoku (Tea Research Journal) 1972

Journal: :International journal of occupational medicine and environmental health 2014
Krzysztof Leszczyński

OBJECTIVES This article compares 2 variants of logging technologies at the motor-manual level: variant A - cutting and delimbing by means of a petrol chainsaw, skidding with the use of a cable winch mounted on a tractor (67-74 kW); variant B - cutting by means of a petrol chainsaw, skidding, debranching and cutting to length by means of a processor aggregated with a farm tractor (61 kW). MATE...

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