| 摘要 |
<p>A method and apparatus for spraying in relation to row crops provides downwardly extending support elements (22) or drop legs carrying spray means in the region of their lower ends. The support elements extend downwardly between crop rows (28) and are moved lengthwise of the crop rows while spraying proceeds. The spray means deliver spray generally upwardly and/or horizontally with respect to the ground so as to treat crop material in the rows. The support elements are mounted so as to float freely and permit lateral movement to follow lateral and other row and crop contours. The support elements may be mounted on a boom (50). The boom may also be provided with downwardly directed spraying means (83) for simultaneous or sequential use. The boom is adapted to fold so as to produce a generally Z-shaped folded configuration. Automatically-actuated stop fingers (218) limit lateral float of the support elements when the boom folds. For lodged crop, the spray nozzles (30) on the support elements may be replaced by rotary wheel elements (128) having projecting spoke elements (130) which penetrate the crop and themselves carry spray means to distribute spray from within the crop. Power driven air discharge means is provided to assist dispersal of the spray.</p> |
