1 The density is too large. Because the spacing of plants, spacing is too small or the seedlings are not timely or fully, the plants are too crowded, the light in the group is weak, and the photosynthetic products are small. As a result, the stalk is slender, its hardness and toughness are reduced, the ear position is increased, and it is easy to occur in storms. Lodging. 2 improper fertilization method. If the base fertilizer is not applied with potassium fertilizer, and nitrogen fertilizer is too much, it will cause corn nutrient imbalance, growth is too fast, the stem is slender, and the mechanical strength of the base is poor, and it is prone to lodging. 3 Roots are underdeveloped. Due to insufficient phosphate or poor soil preparation and shallow roots, the secondary roots are underdeveloped. Once the water is sprayed, it may easily cause root collapse if it encounters strong winds or thunderstorms. 4 Natural disasters. If corn encounters stormy weather, hail and other disasters in the middle and later stages of the corn, it is prone to lodging. 5 pest damage. Corn borer is predominant. The larvae feed on the stems and cause holes. Their resistance to external forces is reduced, and they often cause lodging.
Portable X Ray Machine
Portable X Ray Machine
XX- line of portable
X-ray units is designed to the principle of low cost and high reliability,
which is characteristic in convenient to carry, easy to operate, and highly
automated. X-ray tube and HT coil are all produced by DNDT which guarantees
system consistency and keep this unit have a longer service life.
Weight is further
reduced with the using SF6 insulation and Forced cooling fan, prolongs X-ray tube
life, makes this unit suitable for construction site, field work and high above
the ground work..
Control unit is designed
with microprocessor control and frequency conversion technique. With functions
of fully automatic warm-up program, fault display, over voltage and mis-start
protection, the stability and service life are much improved
Portable X Ray Machine,XXGH Panoramic X Ray Machine,XXGHA Panoramic X Ray Machine,Mini Portable X Ray Machine
Dandong Nondestructive Testing Equipment Co., Ltd. , https://www.ddchinaxray.com