NoviIzdanje za listopad 2026.: Redizajn sinkronizacije John Deere-a, ograničenja minimalne i maksimalne stope, zone izvješća o prinosu

Zahtjevi za uzorkovanje tla u Južnoj Dakoti

Zahtjevi za uzorkovanje tla u Južnoj Dakoti

Državne smjernice: Proširenje SDSU-a, Preporučene metode uzorkovanja tla za Južnu Dakotu.

Uzorkovanje tla u Južnoj Dakoti: učestalost, površina, dubina i jezgre

Koliko često trebate uzimati uzorke tla u Južnoj Dakoti?

Kada u godini treba uzorkovati tlo u Južnoj Dakoti?

Koliko hektara može pokriti jedan uzorak tla u Južnoj Dakoti?

Koliko duboko treba uzimati uzorke tla u Južnoj Dakoti?

  • SDSU Extension, Recommended Soil Sampling Methods for South Dakota Official guidance 0 to 6 inches (0 to 15.24 cm) for P, K, pH, organic matter, soluble salts, zinc, iron, manganese, copper and boron. For mobile nutrients such as nitrate, chloride and sulfur, a 24 inch sample split into 0 to 6 and 6 to 24 inches (15.24 to 60.96 cm).

Koliko jezgara ide u jedan uzorak tla u Južnoj Dakoti?

Koliko uzoraka tla je potrebno za polje od 100 hektara u Južnoj Dakoti?

SDSU Extension, Recommended Soil Sampling Methods for South Dakota: Za ujednačeno polje od 100 hektara potrebno je najmanje 40 složenih uzoraka, ne većih od 2,5 hektara svaki, i ukupno najmanje 240 jezgri, 6 po uzorku.

Uzorci i jezgre za bilo koju veličinu polja

Soil sampling rules in South Dakota, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
South DakotaUnited StatesSouth Dakota only. Other states set their own rules.Routine soil fertility and nitrate samplingSDSU Extension, Recommended Soil Sampling Methods for South Dakota
  • Repeat P, K, pH, salts, Ca, Mg and micronutrients every 2 to 3 years. Nitrate every year before non-legume crops.
  • Season Mobile nutrients, nitrate in particular: late fall once soil is below 50 F, winter, or early spring. Most other tests any time of year.
Grid cells no larger than 2.5 acres (1.01 ha)Whole field composite, a grid of 2.5 acres or less, or directed zone sampling by landscape, yield, imagery or soil conductivity.0 to 6 inches (0 to 15.24 cm) for P, K, pH, organic matter, soluble salts, zinc, iron, manganese, copper and boron. For mobile nutrients such as nitrate, chloride and sulfur, a 24 inch sample split into 0 to 6 and 6 to 24 inches (15.24 to 60.96 cm).At least 15 cores for a whole field or a zone. A grid sample is usually 6 to 8 cores.Official guidanceSDSU Extension P-00132 (PDF)
Who it applies to, the exact wording and every source
Who it applies to
Advice from the public land-grant university extension service for South Dakota. Not law.
In force from
Under review
Legal text
SDSU Extension P-00132, Recommended Soil Sampling Methods for South Dakota (September 2019)

The wording in the source

Timing

  • In general, soil tests for P, K, pH, soluble salts, calcium (Ca), magnesium (Mg), and micronutrients will change very little from year to year and need to be analyzed only every 2 to 3 years.

    P-00132 p. 1, When and how often to sample

  • In contrast, levels of NO3-N can change dramatically from year to year and should be analyzed every year prior to planting non-legume crops.

    P-00132 p. 1, nitrate

  • In summary, a soil sample for most soil tests can be taken anytime during the year.

    P-00132 p. 2, summary

  • For most mobile nutrients, in particular NO3-N, samples should be taken in late fall (when soil temperatures are below 50° F), in winter, or in early spring.

    P-00132 p. 2, summary

Area per sample

  • the largest grid size that will adequately measure nutrient variability for a field should be no more than 2.5 acres in size.

    P-00132 p. 5, Grid sampling

Method

  • Fields may be divided into smaller parcels or “zones” or sampled as a whole field.

    P-00132 p. 4, Field sampling methods

  • The field is divided into rectangular grids and a sample is taken from each grid.

    P-00132 p. 5, Grid sampling

  • Detailed information about a field, such as yield monitor maps, remote sensing imagery, digital soil survey or topographic maps, and/or electrical conductivity data, can all help define nutrient management zones.

    P-00132 p. 5, Directed sampling

Depth

  • A 0-6 inch sample is recommended for P, K, pH, organic matter, soluble salts, zinc (Zn), iron (Fe), manganese (Mn), copper (Cu), and boron (B).

    P-00132 p. 2, Nutrients

  • A deep sample (24-inch) is recommended for mobile nutrients such as NO3-N, chloride (Cl), and sulfur …

    P-00132 p. 2, Nutrients

  • It is recommended to separate deep samples (0-24 inch) into two separate samples; one representing the 0-6 inch depth and the other a 6-24 inch depth (Figure 2).

    P-00132 p. 2, Nutrients

Cores

Sources

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

Sjedinjene Američke Države: savezna pravila i svaka druga država

Propisi o uzorkovanju tla u svakoj zemlji

Prijavi zastarjeli zahtjev: info@geopard.tech

Planirajte točke prema pravilu koje se primjenjuje

Postavite površinu po uzorku, jezgre i dubinu koju zahtijeva vaše pravilo. GeoPard postavlja točke na mrežu ili po zoni, usmjerava šetnju, ispisuje oznake i nosi plan na teren na telefonu.

Izradite plan uzorkovanja Pogledajte Planer uzorkovanja tla

Referenca za planiranje izrađena na temelju službenih izvora, a ne pravnog savjeta. Pravila se primjenjuju ovisno o jurisdikciji, hranjivim tvarima, korištenju zemljišta i programu: prije terenskog rada provjerite trenutni službeni tekst i upute svog laboratorija.

wpChatIkona
wpChatIkona

    Zatražite besplatnu GeoPard demo / konzultaciju








    Klikom na gumb prihvaćate naše Pravila o privatnosti. Treba nam kako bismo odgovorili na vaš zahtjev.

      Pretplati se


      Klikom na gumb prihvaćate naše Pravila o privatnosti

        Pošaljite nam informacije


        Klikom na gumb prihvaćate naše Pravila o privatnosti

        Koristimo kolačiće kako bismo vam pružili najbolje korisničko iskustvo, personalizirali sadržaj naše stranice, analizirali njezin promet i prikazali vam relevantne oglase.
        Vidite naš Pravila o privatnosti za više informacija.

        Prihvati sve