Effects of different tillage systems on nitrate-nitrogen
accumulation in a 120 cm profile and on soil structure in the top 30 cm
of the profile were studied under a fallow-wheat rotation.
Treatment effects on nitrate-nitrogen, soil moisture and soil
aggregation were measured.
Fallow tillage treatments consisting of bare fallow, stubble-mulch...
Appropriate micropropagation regimes were developed for four Pyrus species (P.
amygdaliformis Vill., P. betulaefolia Bunge, P. calleryana Dcne., and P. communis L.)
and Cydonia oblonga L. Shoot multiplication was optimal at 10 or 20μM N⁶⁻
benzyladenine (BA) and high light intensity (135μm⁻²s⁻1). Root formation of the
Pyrus species was stimulated...
Weed resistance is usually diagnosed after a weed control practice has lost
efficacy and weed populations begin to increase rapidly. Prediction and validation in
the field at a very early stage of resistance development is a promising method for
preventing an uncontrollable problem. Pattern-thinking helped individuals connect their
experience of...
Increases in wheat production due to breeding may be reaching
a plateau. The application of N-fertilizer beyond optimum levels
leads to lodging and to an increase in tiller death. The use of
plant growth regulators (retardants) may be an answer for future
increases in production.
Experiments were conducted in 1983...