Potassium-supplying characters and the effect of potassium fertilizer for Chao and Cinnamonsoils were studied with adsorption method, pot cultivation and field trials.

Comparison of potassium absorption, yield and quality between high-oil and common corn affected by potassium application;

K-nutrition characteristics of rice varieties offspring tolerant of K deficiency;

The results show that the main -nozzle diameter and the size of swirl slots are contributing factors to the fuel supply characteristics;the fuel flow is increased and the spray particle size is decreased gradually with the increase of fuel supply pressure,but the increment is slowed down gradually;The spray particle size will keep constant after the fuel supply pressure increasing to a level.

New method for realizing the film-supplying characteristic of a high-speed camera;