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Zahteve za vzorčenje tal v Louisiani

Zahteve za vzorčenje tal v Louisiani

Državne smernice: Nasveti za vzorčenje, testiranje in interpretacijo testov s strani LSU AgCenter.

Vzorčenje tal v Louisiani: pogostost, površina, globina in vzorci

Kako pogosto je treba v Louisiani vzorčiti zemljo?

Kdaj v letu je treba vzorčiti zemljo v Louisiani?

Koliko hektarjev lahko pokrije en vzorec tal v Louisiani?

Kako globoko je treba odvzeti vzorce tal v Louisiani?

Koliko jeder gre v en vzorec tal v Louisiani?

Koliko vzorcev tal potrebuje 100-akrsko polje v Louisiani?

LSU AgCenter soil sampling, testing and test interpretation advice: Za enotno 40-akrsko polje je potrebnih vsaj 10 sestavljenih vzorcev, vsak s površino največ 4 hektarjev, in vsaj 120 jeder skupaj, 12 na vzorec.

Vzorci in jedra za polja vseh velikosti

Soil sampling rules in Louisiana, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
LouisianaUnited StatesLouisiana only. Other states set their own rules.Routine soil fertility samplingLSU AgCenter soil sampling, testing and test interpretation advice
  • Repeat At least once every two to three years, or once per complete crop rotation
  • Season At the same time each year
Zone sampling: one composite per 10 acres. Grid sampling: one composite per 2.5 acres; start new fields at 1 acre.Zone or grid sampling, subsamples in a zigzag pattern within each zone or grid cell. In furrow-irrigated fields, sample the bed top 4 to 6 inches from the row.0 to 6 inches12 to 15 subsamples per composite: one to two per acre for zones, five to six per acre for grids. More where fertilizer was banded or manure spread.Official guidanceLSU AgCenter P3934, Soil Sampling, Testing and Test Interpretation (PDF)
Who it applies to, the exact wording and every source
Who it applies to
Advice for Louisiana fields from the LSU AgCenter. Not law.
Laboratory and analysis
A certified soil laboratory. Louisiana fertilizer recommendations are based on the Mehlich-3 extraction of 0 to 6 inch samples. Use the same laboratory each year.
Field identifiers
Label each bag with farm name and location, sampling date and depth, previous crop and the crop to be grown.
In force from
Under review
Legal text
LSU AgCenter P3934, Soil Sampling, Testing and Test Interpretation for Fertilizer Recommendations (July 2024)

The wording in the source

Timing

Area per sample

  • Zone sampling: Take one composite sample for every 10 acres.

    P3934, Sampling density, p. 2

  • Grid sampling: Take one composite sample for every 2.5 acres. A smaller grid is better than a large grid. For new fields without prior soil testing information, it is advisable to start with a smaller grid (1 acre).

    P3934, Sampling density, p. 2

Method

Depth

Cores

Laboratory and analysis

Field identifiers

  • Clearly label the bag with the farm name and location, sampling date and depth, previous crop and the expected crop to be grown.

    P3934, Sample handling, p. 2

Sources

Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.

Združene države: zvezna pravila in pravila vseh drugih držav

Predpisi o vzorčenju tal v vsaki državi

Prijavi zastarelo zahtevo: info@geopard.tech

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