How to determine the target output?
The target output is the planned output, which is the most original basis for fertilizer quantification. The target production is not based on empirical estimation, or the absolute high yield achieved in other regions is regarded as the target output in the region, but determined by the level of soil fertility. In the test of crop yield dependence on soil fertility, the combined data of comprehensive indicators of soil fertility X (yield of empty fields) and the highest yield Y of fertilization can be paired together. After statistical analysis, between the two, There is also a certain functional relationship, ie Y=X/(a+bX) or Y=a+bX, which is an empirical formula for crop production. It is generally recommended that the average output of the local crop in the first three years, or the output of the year in which the highest yield in the previous three years and the natural conditions such as climate are relatively normal, be used as indicators of soil fertility, and then increase by 10% to no more than 15%. It is planned to be the target output of the year.
How to collect soil samples?
The collection of soil samples or soil samples is an important part of soil analysis. It is a prerequisite for the correctness of the analysis results. In other words, the sampling area should be representative and the soil to be taken should be representative. In order to understand the nutrient supply status in the soil layer during the crop growth period, 20 cm soil layers were used without digging earth pits. For deeper crop roots, the soil layer can be properly deepened. The number of sampling can be determined according to the area of ​​the formulation area, usually not less than 20 points, and the test field should not be less than 5 points. . After the sampling point is demarcated, a soil sample of a specified depth shall be excavated with a cylindrical earth picker or a small soil shovel. To collect soil samples for the analysis of trace elements, an excavator made of stainless steel or bamboo wood is used. Collect all the soil samples first, and then use the quarter-point method to reduce the number of samples one by one, leaving about 1 kilogram, other discarded. The obtained soil is placed in a bag and labels are placed inside and outside the bag to indicate the sampling location, date, sampling person, and content related to the analysis.
How to collect crop samples?
The content of nutrient elements in various organs of crops varies greatly, not only at different growth stages, but also within one day. Therefore, when collecting samples, the various influences should be fully considered according to the purpose and requirements of the analysis. Nutrient content factors. The samples used for mutual comparison should be collected at the same time, and the sampling site should be fixed. Due to the different sensitivity of different organs of crops to different elements, sampling positions can be selected by referring to the sampling tables of various crops for diagnosis. At the same time, sampling should consider randomness and representativeness. Samples should be marked and processed in time to prevent changes in nutrient elements. Fresh samples should be cured in a forced draft oven at 105°C for 10-30 minutes and then dried in a 60°C blast oven for 4-8 hours. . Various smog and dust pollution should be avoided during the process. Samples after drying can be crushed directly in the plant crusher. Pass all the samples through a 0.3-0.5 mm aperture sieve, and then bottling or bagging, labeling and storage in a cool, dry place. When performing trace element analysis, use a stainless steel mill or a porcelain mortar to grind.
We mainly export European Chinese onions, garlic and ginger.
Fresh yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg/net bag, 20kg/net bag or 25kg/net bag (2019 new crop onion)
Peeled yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg / box, 20kg / box, filled with nitrogen, storage time of 90 days.
Frozen onion, frozen onion cube, frozen onion ring 10kg/box or 20kg/box Save for 2 years.
We also offer garlic, ginger and peeled garlic
Our onions have been sold in the Netherlands, the UK, Poland, and Italy, and the quality is very good.
Looking forward to your response, I am very happy to quote you.
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