In 2008, Daxin County was listed as a national soil testing and fertilizer application subsidy project county. In 2009, it implemented the fertile soil engineering project in the autonomous region. In order to coordinate the implementation of the two soil fertilization projects, the test results of the soil testing and fertilizer applicator were verified, as well as the effect of soil testing, formula fertilization, and straw yield increase, as well as economic benefits. This will provide a scientific basis for promoting the two technologies in Daxin County in the future. Daxin County soil and fertilizer station in Xinhua Village, Taocheng Town, Daxin County implemented the test. Metal assembly refers to the process of joining two or more metal
components to create a single, functional unit. This process can be
accomplished through a variety of methods, including welding, brazing,
soldering, and mechanical fastening. Metal Assembly,Zinc Electroplating Metal Plate,Nickel Plated Metal Plate,Perforated Plate Stamping Suzhou Gold ant Precision Sheet Metal Co.,Ltd , https://www.jmycutting.com
1 Materials and Methods
1.1 Test materials
1.1.1 Selection of Crop Variety Qiuyou 998, a rice variety widely grown in the area, was used. The instrument used in the experiment was a soil tester.
1.1.2 Fertilizer varieties and nutrient content The fertilizer varieties and nutrient content are shown in Table 1. 
1.2 Experimental Design and Methods
1.2.1 Treatment design and repetitive arrangement tests were carried out at the responsibility of the farmer households in Dadongtun Fenghailei, Xinhua Village, Taocheng Town, Daxin County. The experiment was set up with four treatments, Treatment A: conventional fertilization for farmers, treatment B: soil testing and formulated fertilization, treatment C: soil testing and formulated fertilization + straw return, treatment D: blank control, three replicates, randomized block arrangement. See Table 2 for fertilizer usage and fertilization periods in each plot. 
Cell area: 20m2, length 6.7m @ width 3m.
Community ridges: 0.2m high and 0.3m wide. Wrapped with plastic film to prevent stringing of fertilizers. Set 3 rows of irrigation ditch, drain width 0.4m, depth
012m.
Cultivation specifications: spacing 0.2m # 0.167m, 15 rows per cell, 40 per line. 
1.2.2 Field management will be broadcast on July 10th, July 12th, and 3.5th leaf on August 3rd.
1) Site preparation, transplanting time and methods. On July 20, 2009 in Fuping, on July 21th, dry Tianshui, and on July 22nd, Tianchao, flattened the straw and sprayed it with straw rot agent and pressed it into the mud; on August 3rd, it was interposed.
2) Occurrence period, damage degree, prevention and control methods and effects of major pests and diseases. On August 26, it was found that rice planthoppers were moderately damaged. On August 28, they were sprayed with imidacloprid. One package per imidacloprid per barrel and three barrels per 667m2. The degree of occurrence of each district is not much different, and drug control is consistent.
3) Severe weather. From October 13th to 15th, there was a faint, cold and cold dew-free weather. Since the pollination period was avoided, the impact on the yield was not significant.
4) Other field operations are described. After field transplanting, Daejeon used deep water to return to green and shallow moisture, and after August 28, enough water was drained to dry the field. On September 1st, deep water was recharged and the wet and dry water was alternated.
In strict accordance with the experimental design of fertilizer varieties, fertilizer levels and fertilization period fertilization.
2 Results and Analysis
2.1 Yield Analysis Acceptance and variance analysis of the yield. The difference between treatments was extremely significant, with no significant difference between the groups. The results showed that the fertility of the selected plots was relatively consistent and the experiment was successful. See Table 3 and Table 4. 
From the analysis of the variance of the output per 667m2 of Table 3 above, we can see that the variation between groups is FF0.01, indicating that there is indeed a difference in yield between treatments. In order to further explain the changes in the output of each treatment, the average yield of each treatment is compared in Table 5. From the comparison table of rice yields in Table 5, it can be seen that the differences between the three fertilization treatments and the blank control yields have reached significant levels, indicating that the fertilization in this county has an effect of increasing yield; soil testing and formula fertilization + straw returning compared to soil testing The differences in formula fertilization yields are significant, indicating that crop straw returning has the effect of increasing yield and is worthy of popularization; the yield of soil testing, formula fertilization is significantly different from that of conventional fertilization by farmers, indicating that soil testing and formula fertilization has the effect of increasing yield and is worth promoting. 
2.2 Yield composition analysis There is an indisputable fact that there is a difference in yield between treatments. In order to further analyze the causes of the soil analyzer test results and yield differences, the intrinsic nature of the variation was identified, and the variance analysis of the yield components of each treatment was conducted. The results showed that the difference in the number of effective panicles per unit area reached a significant level (see Table 7 Analysis of the 667m2 effective panicle analysis of variance;) The difference in the number of panicles per spike reached a significant level (see Table 8 Analysis of variance of panicles in the number of spikes). It is the difference in the composition of the two yields that causes a significant difference in unit production. 
2.3 Economic Benefit Analysis From Table 9 it can be seen that the three fertilization treatments have significantly increased income compared with the blank control, and the soil testing and formula fertilization + straw returning is 667m2 higher than the simple soil fertilization test with an increase in income by 41.1 yuan, and the soil testing and formula fertilization is higher than conventional fertilization for farmers. The increase in revenue of 65.1 yuan is significant.
3 Summary Through the above analysis, we can clearly see: straw returning and soil testing, formula fertilization, significant effect, significant economic benefits. It is an effective means for increasing grain production and increasing farmers' income, and it is worth promoting.
Welding involves melting the metal components at the joint and fusing
them together. This can be done using various heat sources, including
gas flames, electric arcs, and lasers. Welding is commonly used in the
construction of buildings, bridges, and other large structures.
Brazing and soldering are similar processes that involve melting a
filler material to join the metal components. Brazing uses a
high-temperature filler material, while soldering uses a
lower-temperature material. These processes are often used in the
manufacture of electronics and plumbing components.
Mechanical fastening involves using bolts, screws, or other fasteners to
hold the metal components together. This method is commonly used in the
assembly of machinery and vehicles.
Metal assembly is a critical process in many industries, including
manufacturing, construction, and transportation. It requires skilled
technicians and specialized equipment to ensure that the components are
joined correctly and that the final product meets the required
specifications.