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

Zahtjevi za uzorkovanje tla u Arizoni

Zahtjevi za uzorkovanje tla u Arizoni

Državne smjernice: Sveučilišna kooperativna ekstenzija Arizone, vodič za uzorkovanje tla.

Uzorkovanje tla u Arizoni: učestalost, površina, dubina i jezgre

Koliko često trebate uzimati uzorke tla u Arizoni?

Koliko hektara može pokriti jedan uzorak tla u Arizoni?

Koliko duboko treba uzimati uzorke tla u Arizoni?

Koliko jezgara ide u jedan uzorak tla u Arizoni?

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

University of Arizona Cooperative Extension, soil sampling guide: Za ujednačeno polje od 100 hektara potrebno je najmanje 5 složenih uzoraka, svaki ne veći od 20 hektara, i ukupno najmanje 75 jezgri, 15 po uzorku.

Uzorci i jezgre za bilo koju veličinu polja

Soil sampling rules in Arizona, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
ArizonaUnited StatesArizona only. Other states set their own rules.Soil sampling for commercial crop productionUniversity of Arizona Cooperative Extension, soil sampling guide
  • Repeat Regularly, if not every season, before planting each crop
Whole field sampling: one composite sample per 15 to 20 acresWhole field: random cores in a zigzag across the field. Grid: composites per grid cell or points at grid intersections. Zone: separate composites where variation is already known.12 inches for vegetables such as lettuce, spinach, broccoli, celery or cantaloupes. 24 inches for cotton, alfalfa, corn or wheat. Tilled soils to tillage depth.15 to 20 cores or scoops per site, depending on field size and the laboratoryOfficial guidanceUniversity of Arizona Cooperative Extension AZ2147 (PDF)
Who it applies to, the exact wording and every source
Who it applies to
Advice for commercial agriculture in Arizona from the University of Arizona Cooperative Extension. Not law.
In force from
Under review
Legal text
University of Arizona Cooperative Extension AZ2147, A Guide to Effective Soil Sampling for Sustainable Crop Production (July 2025)

The wording in the source

Timing

  • Growers managing agricultural lands are encouraged to test their soils regularly, if not every season, before planting each crop.

    AZ2147, Introduction

Area per sample

Method

  • Samples are collected randomly in a zigzag pattern across the field without consideration of any management practices or topographic features.

    AZ2147, 1. Whole Field Sampling

  • Grid sampling (Figure 4) is a type of spatial sampling that involves dividing the whole field into uniform grids.

    AZ2147, 2. Grid Sampling

  • The first method is done by collecting composite samples in the individual grid, which provides information about the area. The second method of grid sampling is done by collecting soil samples at the points created by the overlapping lines.

    AZ2147, 2. Grid Sampling

  • Zone sampling (Figure 5) is used when points of variation across a field are already known.

    AZ2147, 3. Zone Sampling

Depth

  • For example, if the crop is a vegetable such as romaine or iceberg lettuce, spinach, broccoli, celery, or cantaloupes, a 12-inch sampling depth is adequate; however, for crops like cotton, alfalfa, corn or wheat, a 24-inch sampling depth is recommended.

    AZ2147, Composite Sampling

  • For example, tilled soils only need to be taken to the depth that tilling has occurred.

    AZ2147, Composite Sampling

Cores

  • In general, 15 to 20 soil samples (cores or scoops) (Figure 2) are collected per site (or plot), depending on the size of the field and the requirements of the laboratory doing the testing.

    AZ2147, Composite Sampling

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