The advantage of using a pest survey statistic device is to make investigators lose the old-fashioned way of writing pen records, and it is also more convenient for data recording and processing. For example, a pest survey statistic device can be used to count pest types, outbreak time, etc. And upload this data to the computer for backup storage, convenient for later data viewing and analysis. However, there is a precondition that the collection of pest data must be representative. Therefore, the selection of sampling points is particularly critical when using pest survey statistics.
At present, the most common sampling methods for pest surveys are: single-diagonal, double-diagonal, or five-point, checkerboard, parallel-line, and “Zâ€-shaped sampling. Why are there so many different pest survey sampling methods? The main reason is that different types of pests are suitable for different sampling methods. For example, the “Z†shaped sampling is applicable to pests with more distributions at the field side; the dual diagonal, checkerboard, and parallel lines are suitable for Non-uniform distribution of pests in the field; and single-diagonal, five-point applies to pests distributed in the field. Therefore, when selecting sampling points for pest survey statistics, we must select the appropriate pest survey sampling method based on the actual situation.
The selection of sampling points for pest and disease survey statistics is to ensure that the results of pest and disease survey data are fair and true, and whether or not the sampling points are representative is an important part of correctly reflecting the occurrence of pests and diseases in the field. Therefore, the correct selection of pest survey statistics The sampling point of the device is very important. At the same time, due to the selection of sampling points and the number of samples, it is determined by the types of diseases and insects, the type of field distribution, etc. Therefore, it is necessary for the staff to work in conjunction with the actual conditions in the field to ensure the smooth progress of agricultural production.
Left-hand full-thread bolt
Left-handed full-thread bolts are mainly used in mines where rock formations such as coal mines are not hard enough. bolts are generally used together with anchoring agents to achieve end anchoring or full anchoring in mines.
ANTO left-handed full-thread bolt is made of high-strength HRB500 or HRB600, which can provide high load-bearing capacity to protect mine safety.
Compared with other bolts, it can be installed using ordinary foreign drilling rigs, which saves installation costs.
Anto left-handed full-threaded anchor rod, the threads are distributed throughout the rod body, increasing the moving length of the nut, if the anchor rod support is loose in the later stage, tighten the nut, and the anchor rod restores the support force.
The one-way left-handed rebar bolt without longitudinal reinforcement can be used in all kinds of mines and underground projects, and is especially suitable for the support of coal tunnels with wire mesh. It has achieved good technical and economic effects.
The structural features of the anchor rod: the full length of the body has a rolled continuous thread, and the full length is of equal strength; the fastening end is provided with a prestressed gasket and a ball nut. It is superior to the bolt processed by round steel, and is a new type of bolt with material saving, labor saving and equal strength.
16mm Threaded Steel Rock Bolt,Rebar Rock Bolt,Mining Rebar Bolt,Coal Mine Supporting Anchor
anto mining equipment co.,Ltd , https://www.antobolts.com