Disclosed are a low-cost high-efficiency drip irrigation system for a cotton field and a use method thereof. The drip irrigation system for a cotton field includes a filtering device and a water supply device; wherein the filtering device adopts different types of single filtering devices or combined filtering devices according to different water source types; the water supply device includes multiple stages of main pipes, submain pipes and laterals; the laterals (a drip irrigation tape with labyrinth on one side or a drip irrigation tape inlaid with emitters inside) are laid on the surface of the ground and located below a mulch film. The drip irrigation system adopts the design of large flow (1.5-3.4 L/h), slightly larger pipe diameter (>75 mm), low water pressure (operating pressure of drip irrigation tape being 0.03-0.07 MPa) and suitable drip irrigation uniformity (80%-90%). The water and fertilizer management technology includes the technology of preserving seedlings in soil-moisture-insufficient cotton fields, and is matched with the drip irrigation system.

Disclosed are a low-cost high-efficiency drip irrigation system for a cotton field and a use method thereof. The drip irrigation system for a cotton field includes a filtering device and a water supply device; wherein the filtering device adopts different types of single filtering devices or combined filtering devices according to different water source types; the water supply device includes multiple stages of main pipes, submain pipes and laterals; the laterals (a drip irrigation tape with labyrinth on one side or a drip irrigation tape inlaid with emitters inside) are laid on the surface of the ground and located below a mulch film. The drip irrigation system adopts the design of large flow (1.5-3.4 L/h), slightly larger pipe diameter (>75 mm), low water pressure (operating pressure of drip irrigation tape being 0.03-0.07 MPa) and suitable drip irrigation uniformity (80%-90%). The water and fertilizer management technology includes the technology of preserving seedlings in soil-moisture-insufficient cotton fields, and is matched with the drip irrigation system.

Transformed plants are disclosed with enhanced resistance to abiotic stresses, such as salt stress, water stress, or temperature stress. Also disclosed are vectors useful for making such transformed plants, and methods of transforming plants to enhance resistance to abiotic stresses, such as salt stress, water stress, or temperature stress. For example, the Spartina alterniflora ADF gene SaADF2 enhances resistance when transformed into rice Oryza sativa. Transgenic rice plants that expressed higher levels of Spartina ADF were more resistant to salt, drought, and cold. There was improved growth, higher photosynthesis, and increased grain yield as compared to wild-type (WT) rice.

The present invention relates to the use of specific active substances, alone or in combination, for controlling virus infections in plants and to a method for using said specific active substances for controlling said virus infections in the field of plant protection and the protection of materials.

Methods for manipulating yield and generation time of plants, especially short day plants such as soybean are provided. The methods comprise manipulating external signals such as long day conditions, short day conditions, growth medium, and nutrient supply.

Methods and compositions are disclosed to improve biomass accumulation in Truncated Light-harvesting Antenna (TLA) crop plant canopies as compared to biomass accumulation measured in wild-type counterparts grown under the same high canopy-density, agronomic, and ambient sunlight conditions.

The invention relates to a method for producing for producing soluble potassium sulfate by recrystallization of crude potassium sulfate wherein the crude potassium sulfate contains an amount of potassium, calculated as K.sub.2O of about 15 wt % or higher preferably about 40 wt % or higher and has either more than about 0.07 wt % insoluble material, and/or a dissolution speed wherein at 3 min dissolution of 100 gram product in 1 L cold water (20 C.), without stirring the amount of dissolved potassium sulfate of less than about 90% and/or a pH of about 6 or higher as a 1% dissolved crude potassium sulfate, wherein the method comprises the following steps: crude potassium sulfate is dissolved, the dissolved potassium sulfate is subjected to a solid material removal step, potassium sulfate is crystallized, while optionally an acid is provided before, during or after the crystallization step of the potassium sulfate and whereafter the obtained potassium sulfate is separated and dried, wherein the particle size of the crystalline material is controlled to be within the ranges provided, optionally with sieving and/or grinding, preferably by sieving, such that the resulting potassium sulfate crystalline material conforms with the following characteristics: the amount of insoluble material is less than about 0.05 wt %, a 1 wt % solution of the potassium sulfate has a pH below about 6, and/or 1 pH unit lower than the pH of the crude potassium sulfate, the fraction obtained after crystallization has an average particle size within the following parameters: (i) d90<about 0.6 mm, (ii) d10>about 0.02 mm, and (iii) dust amounts to about 0.4 wt % or less, whereby the potassium sulfate contains more than 51% potassium, calculated as K.sub.2O.

The invention concerns novel nitrification inhibitors.

A cotton topping unmanned aerial vehicle having cutter discs and front grain lifting baffle plates is provided, the unmanned aerial vehicle includes an unmanned aerial vehicle body, a carrying component, a grain lifting component, and a cutting component. The carrying component includes a suspension, an electric push rod mounting base, an electric push rod, a motor mounting base, and motors. An upper end of the electric push rod is bolted to the electric push rod mounting base. The motor mounting base is welded to a lower end of the electric push rod. The grain lifting component is grain lifting baffle plates which include a left baffle plate and a right baffle plate, and both the left baffle plate and the right baffle plate are welded to guard plates.

A cotton topping unmanned aerial vehicle having cutter discs and front grain lifting baffle plates is provided, the unmanned aerial vehicle includes an unmanned aerial vehicle body, a carrying component, a grain lifting component, and a cutting component. The carrying component includes a suspension, an electric push rod mounting base, an electric push rod, a motor mounting base, and motors. An upper end of the electric push rod is bolted to the electric push rod mounting base. The motor mounting base is welded to a lower end of the electric push rod. The grain lifting component is grain lifting baffle plates which include a left baffle plate and a right baffle plate, and both the left baffle plate and the right baffle plate are welded to guard plates.