Due to the influence of people's production activities, the differences in the soil in the plough layer are more significant. Non-uniform fertilization, different fertilization methods, and tillage methods can all lead to local differences in the soil, and these differences often have a certain degree of directionality. Therefore, sampling should follow a certain route, according to the principles of “randomâ€, “equalâ€, and “multi-point mixingâ€. Sampling should pay attention to the following points:
1. S-shaped sampling can better overcome the errors caused by agronomic practices such as cultivation and fertilization, and is generally adopted. However, in the case of small topographic changes, relatively uniform ground forces, and small sample cell area, plum-shaped cloth sampling can also be used.
2. The distribution of the sampling points should be as uniform as possible, and the entire sampling area should be controlled as a whole so as to avoid sampling of piles of fertilizers, fields, trenches, and special terrain.
3. The sampling depth and sampling volume of each sampling point should be uniform, and the proportion of upper and lower soil samples should be the same. The sampler should be perpendicular to the ground and soiled to the required depth. Sampling with soil digging shovel should first spade a section of plough layer, and then shovel the soil under the section parallel to the shovel.
4, a mixed soil sample to take about 1kg is appropriate, if you collect too many samples, you can use the quarter method to remove the excess soil. The method is to place the collected soil samples on a plate or plastic sheet, crumble, mix and spread into squares, diagonally divide the soil sample into four parts, and merge the two diagonal parts into one part. One, discard one. If the resulting sample is still large, it can be treated by quartering again until the required amount.
5. When the collected soil sample is cold rotten or muddy, the quartering method is difficult to apply. The collected sample can be placed in a plastic basin. The plastic mortar can be used to uniformly mix the sludge of each sample and then remove the required quantity. sample.
6. Collect the collected sample into the sample bag, and write each inside and outside of the label with a pencil, indicating the sampling location, date, sampling depth, soil name, serial number and sampling person, etc., and do sampling records at the same time.
Pumpkin has high nutritional value. Each 100g of fresh pumpkin fruit contains 91.9-97.8g of water, 1.3-5.7g of carbohydrates, 0.57-2.4mg of carotene, and other vitamins (VC, VB, VE, etc.), amino acids (citrulline, aspartic acid, etc.) and minerals (Fe, P, Zn, Se, etc.). Pumpkin also has certain medicinal value. It is a maintenance food for children, the elderly, indigestion, hypertension, nephritis and other patients. People with diabetes who cannot eat too much sugar can only eat pumpkin.
Air Dried Pumpkin,Dried Pumpkin,Dehydrated Pumpkin,Dried Pumpkin Pieces
Topower Technology Limited , https://www.topower-foods.com