EFFECT OF TILLAGE ON SOIL PHYSICAL FEATURES, WEED CONTROL AND YIELD IN WINTER WHEAT AND MAIZE PUBLISHED

Dan Nicolae Manea, Lorin Piloca, Gheorghe Cârciu, Simion Alda
Research was carried out between 2006-2008 at the Didactic Station in Timişoara, on a Haplic Chemozem with clayey texture, weak acid reaction (pH 6.7), and medium humus content (3.4%). We monitored the effect of some unconventional soil tillage works (para-plough, chisel, or simply disc) compared to classical till­age, on some physical features of the soil (bulk density, total and air porosity, structure), on weed control and on yield level of two main crops - wheat and maize. Results, show that unconventional soil tillage resulted in a considerable increase of bulk density values (6.2-13.1% in wheat and 3.9-13.2% in maize) and of air porosity. We also noticed an improvement in structural state of soil horizons. A disadvantage of unconventional soil tillage is the inefficient weed control as compared to control variant (143-174% weeding in wheat crops and 147-180% in maize). Though yields in unconven­tional variants are sensibly smaller as compared to control variant they are quite normal (92.7-96.3% in wheat and 94.4-96.4% in maize), however long-term benefits such as soil fertility and soil structure improvement recommend them for the both crops provided one find an efficient strategy in weed control.
soil tillage; physical features; yield; winter wheat; maize
Presentation: oral

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