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The roots are laid on a flat surface and the number of intersections between the roots and random straight lines are counted. Total root length is the...Read more
A heat-labile substance toxic to nitrite-oxidizing bacteria was present in the outer tissues of roots of Hyparrhenia filipéndula; in the summer (Nov.-...Read more
cf. F.A. 26 No. 1678.] Gypsum electrical-resistance blocks were used to follow changes in soil moisture on four forested sites and one grass-covered s...Read more
Water movement in response to gradients of water potential in the soil-plant-atmosphere catena is considered. An approximate solution is presented of ...Read more
(S. & F. XXVIII ). Soil-moisture changes were followed for three years; the plantations varied in age from 20 to 32 years and were on soils d...Read more
An approximate solution is presented of the differential equation describing soil-moisture flow towards a root absorbing water at a periodically varyi...Read more
A mathematical model was constructed to simulate various above-ground and below-ground compartments of the producer subsystem for a shortgrass prairie...Read more
Oryzopsis holciformis (M.B.). Hack. (hairy ricegrass) was sown in loess soil in containers 60 cm deep at densities of between 160 and 3200 seedlings/m...Read more
A non-destructive stain technique for quantifying root growth was developed. Red, blue and yellow chlorotriazinyl dyes are individually applied as a s...Read more
In continued work [cf. F.A. 25 No. 54], tensiometers and electrical resistance blocks were used to measure water tension and, indirectly, water conten...Read more