Collection and Treatment of I-Soil Analysis Samples Using TFC Series Soil Nutrient Tester
Formula fertilization is a new agricultural technology that yields the highest yield of crops with the minimum input of fertilizer. The basis of this technology is to measure the existing nutrient content in the soil, and then determine what fertilizer should be applied according to the species and target yield of the crop. How much fertilizer.
Soil sample collection is an important part of determining the accuracy of the analysis results. Therefore, soil samples should be collected strictly according to the following methods.
For crops with shallow roots, only 20 cm depth of soil should be used. For deeper crop roots such as wheat, the depth of the crop should be increased. Orchard soil samples should be collected at a depth of 40 cm. According to the size and topography of cultivated land in the test area, the area of ​​small plots should be more than 5 points, and the area of ​​large plots should be more than 20 points. The sampling points are preferably distributed using S-sampling or cross-cutting. (See Figure 1)
Too many samples can be used to discard a part of the quartile method to retain 1 kg of soil samples (see Figure 2). The method is: pour the collected soil samples on a clean wooden board or plastic cloth, smash the soil by hand, and use tweezers to remove the crop roots, insects, stones and other debris from the soil samples, and put them indoors. Dry in a cool and ventilated place. Be careful not to expose it to the sun and broil it in order to avoid oxidation. The air-dried soil sample was crushed with wooden sticks or glass bottles (not metal products), and then sieved through 1-2 mm sieves. The screened soil samples are tiled into squares. If the quantity is still large, it can be treated by quartering method until the required quantity. Generally, 50 grams of soil samples can be used. After completing the soil sample processing, please fill out the soil registration. table.
Note: If a household has several soil samples or several households each have a soil sample, the soil registration form can be filled in separately, and the soil sample packaging should be marked with the same content as the registration form to avoid mistakes.
Avoid sampling on the bottom of manure piles and on the same ridges, as well as on the side of fields, roadsides, ditch and special terrain.
Sampling in a specific sampling point with a small shovel to cut down a piece of soil sample, each sample point to take the soil thickness, thin, deep, shallow, wide, narrow, should be consistent, concentrated and mixed.
Organic fertilizer analysis sample collection and processing methods: compost, manure, manure, grass pond fertilizer, biogas fertilizer, livestock manure and human waste are all organic fertilizers, these fertilizers are mostly uneven, sampling should pay attention Sampling points, generally should be turned in the heap after mixing, select 10-20 sampling points, the proportion of large and scattered fertilizers similar, put a number of samples collected on a clean plastic sheet, into the room air-dried , Spread out to dry, and then crushed the sample, thinning, mixing, and then use the quarter-divided method to about 500 grams, grinding and all through a 1-mm aperture sieve, into the sample bottle.
If there are more stones in the organic fertilizer sample, they should be weighed out separately and their percentage of the original sample should be calculated. If NH4 and NO3 in the organic fertilizer are to be determined, fresh samples are used, ie, not dried. Measure immediately.
Fecal urine and biogas fertilizer are liquid and solid compound fertilizers, which can be firstly mixed and placed in a closed container before removing the layered material, and the solids are fully crushed with a glass rod. The container should be repeatedly shaken before analyzing the sample. Mix well.
Quartering method:
Hangzhou Top Instrument Co., Ltd.
Room 806, Songdu Building, No. 69 Wangjiang Road, Hangzhou
Tel 86059660 86062776
fax
High Precision Edm Wire Cutting Machine
High Precision Edm Wire Cutting Machine,Edm Wire Cutting Machine,Electrical Discharge Machining,Wire Electrical Discharge Machining
Taizhou Jiangzhou CNC Machine Tool Manufacturing Co.,Ltd , https://www.machinetzjz.com