216 results about "Soil depth" patented technology

The invention discloses a hydraulic deep and rotary cultivation powdery ridge machine which comprises a traveling gear, a cab, an engine, a powdery ridge machine and a framework. The cab and the engine are arranged on the framework, the traveling gear is mounted on the lower portion of the framework and is driven by the engine, a cutting disc which is driven by a hydraulic motor is arranged on the front lower portion of the framework, and the powdery ridge machine is connected to the rear of the framework by hinge seats and hydraulic cylinder supports. The hydraulic deep and rotary cultivation powdery ridge machine has the advantages that the hydraulic deep and rotary cultivation powdery ridge machine can travel stably, is simple and practical, is high in soil smashing efficiency and favorable for growth of roots of crops, deep soil loosening, surface soil loosening and soil lump smashing functions are integrated, deep soil drilling effects can be realized, and the oxygen contents of deep positions of soil and the yield of the crops can be increased.

The invention discloses a layered remediation method for chromium contaminated soil. The method comprises the following steps: detecting the actual chromium contamination condition of soil, determining the boundary of severe and mild chromium contaminated soil on soil depth, performing remediation on the severe chromium contaminated soil by adopting a chemical reduction stabilization method, performing remediation on the mild chromium contaminated soil by adopting a chemical or biochemical reduction stabilization method, performing soil conservation, balancing the soil acidity and alkalinity and performing later-stage tracking and monitoring. An actual chromium contaminated field serves as a support, the combined remediation methods are selected aiming at the current situation that the contamination degrees of the upper soil and the bottom soil are different, the severe chromium contaminated soil on the surface layer is subjected to remediation by adopting the chemical reduction stabilization method, the mild chromium contaminated soil on the deep layer is subjected to remediation by adopting the chemical or biochemical reduction stabilization method, the defects that the soil properties are not distinguished and a same remediation method is adopted in a unified mode in the previous research are overcome, and ex-situ remediation and in-situ remediation are combined to be used, so that the remediation method is reasonable in application under the condition that the remediation effect is guaranteed, the remediation cost is reduced, and the method can be applied to actual soil remediation on a large scale.

The invention discloses a seedling strip weeding single body for conducting ultrasonic ranging and automatically regulating weeding depth, and belongs to agricultural machinery. A mounting shelf is fixedly installed on a rack cross beam, a single body shelf is hinged to the mounting shelf through a parallel four-bar mechanism A, the two ends of a bothway hydraulic oil cylinder are hinged to the mounting shelf and the single body shelf respectively, an earth surface profiling slide plate assembly is hinged to the lower portion of the front end of the single body shelf through a parallel four-bar mechanism B, a ranging projection disc is horizontally and fixedly installed at the upper end face of the earth surface profiling slide plate assembly, an ultrasonic ranging sensor is installed at the portion, located above the ranging projection disc, on the single body shelf, a wire makes the ultrasonic ranging sensor communicated with a hydraulic system control single-chip microcomputer, and a weeding tooth disc wheel assembly is assembled at the portion, located at the rear part of the earth surface profiling slide plate assembly, of the lower lateral part of the rear end of the single body shelf. The seedling strip weeding single body makes weeding in-soil depths keep consistent all the time, and has the advantages of being novel and reasonable in structure, high in automated degree, good in work quality, and high in adaptability.