Limits...
Dryland soil chemical properties and crop yields affected by long-term tillage and cropping sequence.

Sainju UM, Allen BL, Caesar-TonThat T, Lenssen AW - Springerplus (2015)

Bottom Line: Information on the effect of long-term management on soil nutrients and chemical properties is scanty.At 0-7.5 cm, P, K, Zn, Na, and CEC were 23-60% were greater, but pH, buffer pH, and Ca were 6-31% lower in NTCW, STCW, and FSTW-B/P than STW-F.At 7.5-15 cm, K was 23-52% greater, but pH, buffer pH, and Mg were 3-21% lower in NTCW, STCW, FSTCW, FSTW-B/P than STW-F.

View Article: PubMed Central - PubMed

Affiliation: USDA-ARS, Northern Plains Agricultural Research Laboratory, Sidney, MT 59270 USA.

ABSTRACT
Information on the effect of long-term management on soil nutrients and chemical properties is scanty. We examined the 30-year effect of tillage frequency and cropping sequence combination on dryland soil Olsen-P, K, Ca, Mg, Na, SO4-S, and Zn concentrations, pH, electrical conductivity (EC), and cation exchange capacity (CEC) at the 0-120 cm depth and annualized crop yield in the northern Great Plains, USA. Treatments were no-till continuous spring wheat (Triticum aestivum L.) (NTCW), spring till continuous spring wheat (STCW), fall and spring till continuous spring wheat (FSTCW), fall and spring till spring wheat-barley (Hordeum vulgare L., 1984-1999) followed by spring wheat-pea (Pisum sativum L., 2000-2013) (FSTW-B/P), and spring till spring wheat-fallow (STW-F, traditional system). At 0-7.5 cm, P, K, Zn, Na, and CEC were 23-60% were greater, but pH, buffer pH, and Ca were 6-31% lower in NTCW, STCW, and FSTW-B/P than STW-F. At 7.5-15 cm, K was 23-52% greater, but pH, buffer pH, and Mg were 3-21% lower in NTCW, STCW, FSTCW, FSTW-B/P than STW-F. At 60-120 cm, soil chemical properties varied with treatments. Annualized crop yield was 23-30% lower in STW-F than the other treatments. Continuous N fertilization probably reduced soil pH, Ca, and Mg, but greater crop residue returned to the soil increased P, K, Na, Zn, and CEC in NTCW and STCW compared to STW-F. Reduced tillage with continuous cropping may be adopted for maintaining long-term soil fertility and crop yields compared with the traditional system.

No MeSH data available.


Total precipitation during the growing season (April–August) and throughout the year (January–December) from 1984 to 2013 at the experimental site.
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4491341&req=5

Fig2: Total precipitation during the growing season (April–August) and throughout the year (January–December) from 1984 to 2013 at the experimental site.

Mentions: Absence of crops during fallow resulted in lower annualized crop grain yield in STW-F than the other treatments during the years when the growing season precipitation was near or similar to the 105-year average (Figure 2). Similar results of lower annualized crop grain yield in crop-fallow than continuous cropping in dryland cropping systems during the years with near normal precipitation in the northern Great Plains have been reported by several researchers (Halvorson et al 2000; Campbell et al 2004; Tarkalson et al. 2006; Sainju 2014). Crop yields were not different among treatments during years with below-normal precipitation, such as in 1984, 1985, 1988, 1995, 2006, and 2007 or above-average precipitation, such as in 1991, 1993, 2003, and 2010. This suggests that increased soil water conservation by fallow during years with below-normal precipitation increased crop yield in STW-F, thereby resulting in similar annual crop yields among all treatments in these years. During years with above-average precipitation, anaerobic condition due to increased soil water content reduced crop yields, resulting in non-significant differences in yields among all treatments.Figure 2


Dryland soil chemical properties and crop yields affected by long-term tillage and cropping sequence.

Sainju UM, Allen BL, Caesar-TonThat T, Lenssen AW - Springerplus (2015)

Total precipitation during the growing season (April–August) and throughout the year (January–December) from 1984 to 2013 at the experimental site.
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4491341&req=5

Fig2: Total precipitation during the growing season (April–August) and throughout the year (January–December) from 1984 to 2013 at the experimental site.
Mentions: Absence of crops during fallow resulted in lower annualized crop grain yield in STW-F than the other treatments during the years when the growing season precipitation was near or similar to the 105-year average (Figure 2). Similar results of lower annualized crop grain yield in crop-fallow than continuous cropping in dryland cropping systems during the years with near normal precipitation in the northern Great Plains have been reported by several researchers (Halvorson et al 2000; Campbell et al 2004; Tarkalson et al. 2006; Sainju 2014). Crop yields were not different among treatments during years with below-normal precipitation, such as in 1984, 1985, 1988, 1995, 2006, and 2007 or above-average precipitation, such as in 1991, 1993, 2003, and 2010. This suggests that increased soil water conservation by fallow during years with below-normal precipitation increased crop yield in STW-F, thereby resulting in similar annual crop yields among all treatments in these years. During years with above-average precipitation, anaerobic condition due to increased soil water content reduced crop yields, resulting in non-significant differences in yields among all treatments.Figure 2

Bottom Line: Information on the effect of long-term management on soil nutrients and chemical properties is scanty.At 0-7.5 cm, P, K, Zn, Na, and CEC were 23-60% were greater, but pH, buffer pH, and Ca were 6-31% lower in NTCW, STCW, and FSTW-B/P than STW-F.At 7.5-15 cm, K was 23-52% greater, but pH, buffer pH, and Mg were 3-21% lower in NTCW, STCW, FSTCW, FSTW-B/P than STW-F.

View Article: PubMed Central - PubMed

Affiliation: USDA-ARS, Northern Plains Agricultural Research Laboratory, Sidney, MT 59270 USA.

ABSTRACT
Information on the effect of long-term management on soil nutrients and chemical properties is scanty. We examined the 30-year effect of tillage frequency and cropping sequence combination on dryland soil Olsen-P, K, Ca, Mg, Na, SO4-S, and Zn concentrations, pH, electrical conductivity (EC), and cation exchange capacity (CEC) at the 0-120 cm depth and annualized crop yield in the northern Great Plains, USA. Treatments were no-till continuous spring wheat (Triticum aestivum L.) (NTCW), spring till continuous spring wheat (STCW), fall and spring till continuous spring wheat (FSTCW), fall and spring till spring wheat-barley (Hordeum vulgare L., 1984-1999) followed by spring wheat-pea (Pisum sativum L., 2000-2013) (FSTW-B/P), and spring till spring wheat-fallow (STW-F, traditional system). At 0-7.5 cm, P, K, Zn, Na, and CEC were 23-60% were greater, but pH, buffer pH, and Ca were 6-31% lower in NTCW, STCW, and FSTW-B/P than STW-F. At 7.5-15 cm, K was 23-52% greater, but pH, buffer pH, and Mg were 3-21% lower in NTCW, STCW, FSTCW, FSTW-B/P than STW-F. At 60-120 cm, soil chemical properties varied with treatments. Annualized crop yield was 23-30% lower in STW-F than the other treatments. Continuous N fertilization probably reduced soil pH, Ca, and Mg, but greater crop residue returned to the soil increased P, K, Na, Zn, and CEC in NTCW and STCW compared to STW-F. Reduced tillage with continuous cropping may be adopted for maintaining long-term soil fertility and crop yields compared with the traditional system.

No MeSH data available.