A simple and inexpensive system was designed, constructed, tested, and used to vary soil O
$\sb2 $ concentration, water potential, temperature, and mechanical impedance. Using this …

A system was designed, constructed, tested, and used to grow Brassica rapa L. seedling
roots which were exposed to O 2 concentrations from 0 to 0.21 mol mol− 1, water potentials …

Root systems of individual crop plants may encounter large variations in mechanical
impedance to root penetration. Split-root experiments were conducted to compare the effects …

The role of mechanical impedance, poor aeration and water availability in restricting pea
(Pisum sativum L.) seedling root growth in sandy loam soil at three bulk densities and six …

Soil compaction is a major factor which influences root growth and crop yields. Studies were
conducted to determine the influence of different factors on mechanical impedance and to …

Mechanisms of root growth under variable field conditions were investigated by observing
corn (Zea mays L.) root growth and distribution in the field and by observing the influence of …

Relationships between mechanical impedance and root growth have not been extensively
defined for field conditions, and as a result, it is usually impossible to know with certainty …

Two experiments were performed in simplified soil-less systems to study how roots respond
to changes in mechanical impedance. In the first the increases in root force and diameter …

The effects of conditions pre-dating germination on growth rate of impeded barley cv.
Harrington roots were measured using an agar-capillary tube technique. Seedling root tips …

Background and aims Biomechanical properties of cereal root systems largely control both
resistance to root lodging and their ability to stabilise soil. Abiotic stresses can greatly modify …