Abstract: The present disclosure provides a joint control method for nitrogen and phosphorus emissions in farmlands, comprising: reducing nitrogen and phosphorus input during crop sowing or planting by applying composite organic material and chemical fertilizer, wherein the composite organic material comprises: 200-250 parts of edible fungi residues, 300-350 parts of charcoal and 5-10 parts of rhamnolipid; constructing a nitrogen-phosphorus retention layer by utilizing composite microbial agent in combination with 150 parts of edible fungi residues and 20 parts of straw-based hydrogel; constructing a barrier layer by utilizing composite material, and controlling downward leaching of nitrogen and phosphorus that are not absorbed by crops, wherein the composite material of the barrier layer comprises: 25-35 parts of straw-based hydrogel, 20-30 parts of edible fungi residues, 35-55 parts of bentonite and 5-10 parts of corn flour.

Abstract: Disclosed is a switch control mechanism for a garden tool, the mechanism comprising handles, a switch and shift rods. Triggers are arranged on the handles, and the handles can rotate around the axes thereof. The triggers are connected to the shift rods by pull ropes, and the contact faces between the pull ropes and the triggers are spherical faces. The handles of the switch control mechanism for the garden tool can rotate within 360 degrees, so as to satisfy different operators, and can ensure that a user can control the switch of a machine wherever the handles are placed.

Abstract: An operating control mechanism for a garden tool comprises a control button and a pair of handles located at both sides of the control button. Triggers are arranged on the handles. The operating control mechanism further comprises stop components which are movable relative to the handles. The handles can rotate around axes by moving the stop components.

Abstract: Disclosed is an operating control mechanism for a garden tool, the mechanism comprising a control button and a pair of handles located at both sides of the control button. Triggers are arranged on the handles. The operating control mechanism further comprises stop components which are movable relative to the handles. The handles can rotate around axes by moving the stop components. The operating control mechanism can meet the operation demands of different users.

Abstract: Disclosed is a switch control mechanism for a garden tool, the mechanism comprising handles, a switch and shift rods. Triggers are arranged on the handles, and the handles can rotate around the axes thereof. The triggers are connected to the shift rods by pull ropes, and the contact faces between the pull ropes and the triggers are spherical faces. The handles of the switch control mechanism for the garden tool can rotate within 360 degrees, so as to satisfy different operators, and can ensure that a user can control the switch of a machine wherever the handles are placed.