Comparison of No-tillage Farming among the Three Different Soils IV. General Discussion on the Adaptability and Problems.

Sakai, Naoki; Yonekawa, Satoshi; Sunohara, Wataru; Itô, Michiaki; Endo, Oritaro; Fukuda, Akira; Ito, Nobuyasu

doi:10.4035/jsfwr.29.51

Cited by 2 publications

(2 citation statements)

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“…2004; Ogawa et al . 1988) and for maize and barley in Tokyo and Niigata prefectures in central Japan (Sakai et al . 1994).…”

Section: Discussionmentioning

confidence: 99%

“…Greater or equal crop yields under RT in various studies in Japan indicate that RT is a promising conservation tillage practice that would not sacrifice crop yields in Japan's Andisol fields. In terms of no‐till soil management in Japan, there are some reports on yield reductions owing to germination, weed and soil temperature problems (Sakai et al . 1994; Tsuji et al .…”

Section: Discussionmentioning

confidence: 99%

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Effects of reduced tillage, crop residue management and manure application practices on crop yields and soil carbon sequestration on an Andisol in northern Japan

Koga

Tsuji

2009

Soil Science and Plant Nutrition

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Soil carbon sequestration in agricultural lands has been deemed a sustainable option to mitigate rising atmospheric CO2 levels. In this context, the effects of different tillage and C input management (residue management and manure application) practices on crop yields, residue C and annual changes in total soil organic C (SOC) (0–30 cm depth) were investigated over one cycle of a 4‐year crop rotation (2003–2006) on a cropped Andisol in northern Japan. For tillage practices, the effects of reduced tillage (no deep plowing, a single shallow harrowing for seedbed preparation [RT]) and conventional deep moldboard plow tillage (CT) were compared. The combination of RT, residue return and manure application (20 Mg ha−1 in each year) increased spring wheat and potato yields significantly; however, soybean and sugar beet yields were not influenced by tillage practices. For all crops studied, manure application enhanced the production of above‐ground residue C. Thus, manure application served not only as a direct input of C to the soil, but the greater crop biomass production engendered enhanced subsequent C inputs to the soil from residues. The SOC contents in both the 0–5 cm and 5–10 cm layers of the soil profile were greater under RT than under CT treatments because the crop residue and manure were densely incorporated into the shallow soil layers. Comparatively, neither tillage nor C input management practices had significant effects on annual changes in SOC content in either the 10–20 cm or 20–30 cm layers of the soil profile. When soil C sequestration rates, as represented by annual changes in total SOC (0–30 cm), were assessed on a total soil mass basis, an anova showed that tillage practices had no significant effect on total C sequestration, but C input management practices had significant positive effects (P ≤ 0.05). These results indicate that continuous C input to the soil through crop residue return and manure application is a crucial practice for enhancing crop yields and soil C sequestration in the Andisol region of northern Japan.

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“…2004; Ogawa et al . 1988) and for maize and barley in Tokyo and Niigata prefectures in central Japan (Sakai et al . 1994).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%