In:
Soil Science Society of America Journal, Wiley, Vol. 59, No. 6 ( 1995-11), p. 1768-1772
Abstract:
Band application of P fertilizer in no‐till fields results in extremely variable soil test P (STP) along lines perpendicular to the bands. This variation may be represented by two interlaced populations, each with a unique STP mean and standard deviation. The objectives of this research were to: (i) characterize STP populations in a band‐fertilized field; (ii) use these population characteristics to calibrate a Monte Carlo based model to simulate STP populations; and (iii) use simulated STP populations to evaluate different soil sampling procedures. A corn ( Zea mays L.) field was band fertilized with P, and 1 yr later STP (mg P kg −1 ) was measured on individual soil cores with the bicarbonate extraction procedure. Out‐band STP mean and standard deviation (SD) were 13.9 ± 4.75, in‐band STP mean and SD were 127.4 ± 29.7, and composite STP mean and SD were 23.3 ± 28.69. A computer simulation model based on the Monte Carlo technique reproduced the observed populations very closely. The results show that the number of completely random soil cores needed to represent a band‐fertilized field is prohibitive. Rapid collection of a single representative composite sample with equipment capable of taking a slice of soil across the fertilizer band and accurately weight in‐band and out‐band STP by volume is recommended.
Type of Medium:
Online Resource
ISSN:
0361-5995
,
1435-0661
DOI:
10.2136/sssaj1995.03615995005900060038x
Language:
English
Publisher:
Wiley
Publication Date:
1995
detail.hit.zdb_id:
241415-6
detail.hit.zdb_id:
2239747-4
detail.hit.zdb_id:
196788-5
detail.hit.zdb_id:
1481691-X
SSG:
13
SSG:
21
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