Subsurface application of chemicals

Details Subsurface application of chemicals Subsurface application of chemicals

1985-04-15

1987-08-04

Hafer, Robert A.

Planting

Liquid or gas soil treatment

Hand manipulated

47 17, A01C 2302

Patent

active

046838260

ABSTRACT:
In the subsurface application of herbicides, a plurality of upwardly directed nozzles having one millimeter openings are pulled beneath the soil surface behind the trailing side of a sweep in parallel paths two to four centimeters apart while jets of herbicide are emitted so that moving soil passing over each jet receives ample herbicide properly spaced to control germinating weeds. The pressure of application and speed of movement forms treated bands having widths before diffusion of five millimeters of soil and liquid uniformly mixed to a depth of approximately eight centimeters over the treated area. The sweep operates at a depth up to eight centimeters and pesticide incorporation depends on such variables as soil density, soil moisture, spacing of nozzles and injection pressure. A uniform distribution of chemicals in bands near or completely to the surface of the soil is made possible with a one-pass operation, while the soil and plant residue on the surface remain substantially undisturbed.

REFERENCES:
patent: 1093786 (1913-09-01), Korthauer
patent: 3294324 (1966-12-01), Skaptason
patent: 3581685 (1971-06-01), Taylor

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