小型トラクタ用ウィーダに関する研究 (第2報)
小麦に対する適用性
1973 年 35 巻 1 号 p. 25-32
詳細
1973 年 35 巻 1 号 p. 25-32
The authors applied the weeder for walking tractor to wheat and obtained the next results.
(1) Losing of wheat is little and the effect of weeding is high when depth of covering of wheat is deep and its dispersion is little. The effect of the weeder was high when depth of the weeder was 2.5cm and depth of covering of wheat was 3cm on the test.
(2) Remaining ratio of weed was less than 5-10% when the weeder was used two times within 40 days after the seeding.
(3) The losing of wheat was discovered fairly in case of high soil moisture (above d. b. 38%) especially at 2-3 leaves of wheat and above 3cm on depth of the tines. The losing of wheat was also discovered highly in case of the same cases.
(4) The losing of wheat was not discovered when the weeder was used before and after germination of wheat.
(5) Using of weeder did not result in the decrease of crop of wheat.
(6) The soil moisture as far as 1cm under the surface of the field decreased to d. b. 20%, but the soil moisture of the deeper did not decrease.
(7) The authors considered that the weeder (depth of tines: 2.5cm, interval of locus of tines: 1.25cm) had adaptability for wheat except some examples.
