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http://dx.doi.org/10.7744/cnujas.2015.42.3.183

In-situ estimation of effective rooting depth for upland crops using hand penetration of cone probe  

Han, Kyung-Hwa (Soil and Fertilizer, National Academy of Agricultural Science, RDA)
Zhang, Yong-Seon (Soil and Fertilizer, National Academy of Agricultural Science, RDA)
Jung, Kang-Ho (Soil and Fertilizer, National Academy of Agricultural Science, RDA)
Cho, Hee-Rae (Soil and Fertilizer, National Academy of Agricultural Science, RDA)
Publication Information
Korean Journal of Agricultural Science / v.42, no.3, 2015 , pp. 183-189 More about this Journal
Abstract
Plant root penetration through soil profile is restricted by compacted layer such as plow pan under conventional tillage. For detecting the compact layer, we made a graduated T-shape probe and measured compared between the depths with rapid change in feeling hardness of hand penetration using T-shape probe and with a rapid increase of penetrometer cone index. On upland crops, including red pepper, corn, soybean and cucumber, plow pan depth ranged from 10 cm to 25 cm depth. The effective rooting depth (ER) had significant correlation with the plow pan depth (PP) except soils with the shallow ground water and/or poorly drained soil. The regression equation was ER = 0.9*PP ($R^2=0.54^{**}$, N = 14) with the applicative PP range of 10-25 cm.
Keywords
Effective rooting depth; Cone probe; upland crops; In-situ estimation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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