Influence of Crop Rotation and Intercropping on Microbial Populations in Cultivated Fields Under Different Organic Amendments

2014 ◽  
pp. 571-580
Author(s):  
Haribashai Swer ◽  
M. S. Dkhar
Keyword(s):  
Crop Rotation ◽  
Organic Amendments ◽  
Microbial Populations

scholarly journals Long term crop rotation effect on soybean yield explained by soil- and root-associated microbiome and soil health indicators

2020 ◽  
Author(s):  
Achal Neupane ◽  
Izzet Bulbul ◽  
Ziyi Wang ◽  
R. Michael Lehman ◽  
Emerson Nafziger ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Crop Yield ◽  
Soil Health ◽  
Health Indicators ◽  
The Other ◽  
Microbial Populations ◽  
Soybean Yield ◽  
Soil Microbial ◽  
One Year

Abstract Background Crop rotation is an important management tactic that farmers use to manage crop production and reduce pests and diseases. Long-term crop rotations may select groups of microbes that form beneficial or pathogenic associations with the following crops, which could explain observed crop yield differences with different crop sequences. To test this hypothesis, we used two locations each with three long-term (14 year), replicated, crop rotation treatments: continuous corn ( Zea mays ) (CCC), corn/corn/soybean (SCC), and corn/soybean (CSC); both CSC and SCC had each phase present each year. In Year 15, we grew soybean ( Glycine max ) in each plot, so that soybean replaced corn in CCC and in the CSC phase where soybean grew in Year 14, and took data from soybeans following CCC (14 years of corn), SCC (two years of corn), CSC (one year of corn), and SCS (one year of soybean). Soybean yield and soil health indicators were measured, along with the bulk soil microbiome and soybean root-associated microbiome.Results Soybean yields were significantly higher following CCC than in the other three treatments at both locations. Soil protein as a soil health indicator was also higher following CCC than in the other treatments. Differential abundances of bacterial and fungal taxa were related to yield differences in a site-specific manner. Uncultured bacterial taxa in family JG30-KF-AS9 was enriched in the high-yielding CCC plots in Monmouth, whereas Microvirga , Rhodomicrobium , and Micromonosporaceae were enriched in the low-yielding SCS plots. Members of the fungal phylum Ascomycota were informative in explaining yield differences among treatments mostly as pathogens, but Tumularia , Pyrenochaetopsis and Schizothecium were enriched in the CCC plots, suggesting a role as either corn pathogens or beneficial fungal taxa for soybean. Multivariate analysis associated soil health indicators with the rotation regimes and some of the differentially abundant microbial taxa.Conclusions Our finding of associations between soil health indicators related to soil microbial populations and soybean yield following different cropping sequences has wide-ranging implications, opening the possibility of both monitoring and manipulating soil microbial populations as a way to improve crop yield potential.

scholarly journals Rehabilitation of Old and Moribund Cacao Soil Using Organic Amendments in Ibadan and Owena of South West Nigeria

2020 ◽  
pp. 80-89
Author(s):  
M. O. Okeniyi ◽  
S. B. Orisajo ◽  
S. O. Afolami ◽  
A. O. Enikuomehin ◽  
I. O. O. Ayelaagbe ◽  
...  
Keyword(s):  
Organic Materials ◽  
Block Design ◽  
Organic Amendments ◽  
Microbial Populations ◽  
Control Treatment ◽  
Randomized Complete Block Design ◽  
Leaf Powder ◽  
Cocoa Pod Husk ◽  
Ondo State ◽  
Second Year

Aims: To evaluate the effects of organic amendment in the rehabilitation of two moribund cacao plantations at Ibadan (Oyo State) and Owena (Ondo State) using organic materials that included Cocoa Pod Husk (CPH) and Neem Leaf powder (NL). Study Design: The experiment was laid out in a Randomized Complete Block Design in four replicates with four treatments which were CPH, CPH+NL (90:10), CPH+NL (80:20) and untreated. Place and Duration of Study: Cocoa plantations at Ibadan and Owena, Nigeria between May, 2014 and Dec 2017. Methodology: Initial soil sampling was done. Organic materials were applied to eight cacao trees in a ring at the base of trees in treated plots at the beginning of the rains in April/May and August/September. The treatments are: CPH Only @ 0.5 kg/tree, CPH Fortified with Neem Leaf (90:10) @ 0.45 kg + 0.05 kg/tree, respectively, CPH fortified with Neem Leaf (80:20) @ 0.40 kg + 0.10 kg/tree respectively. No application (control treatment). Results: Eleven fungi species assigned to seven genera were recovered across the treatments. Organic amendments significantly (p<0.05) increased soil mineralization, microbial populations and pod production. After the second year of applications, CPH had the highest percentage of pod production over the control (64%) in Ibadan, while in Owena, CPH, CPH+NL (80:20) and CPH+NL (90:10) had percentage pod increase of 68, 64 and 63%, respectively, over the control. Organic materials had significant (p≤0.05) effect in raising the soil pH in the two locations from 6.41 to 6.82 in Owena and from 6.50 to 6.89 in Ibadan, compared to untreated soil. Conclusion: The use of organic amendments in the rehabilitation of old and moribund cocoa (near death), improved soil nutrients as well as increased pod production and the microbial populations from the two plantations.

Converting stewardship values into policy: The mission of the 1990 Farm Bill

1989 ◽  
Vol 4 (3-4) ◽  
pp. 167-168 ◽  
Author(s):  
Ron Kroese
Keyword(s):  
Species Diversity ◽  
Crop Rotation ◽  
Organic Amendments ◽  
Farm Bill ◽  
Legislative Action ◽  
Synthetic Fertilizers

AbstractFarmers committed to the overall goal of sustainability in agriculture have banded together to support legislative action favorable to that goal. Specific objectives relate to addition of organic amendments to soils to improve fertility, avoidance of excessive use of pesticides and synthetic fertilizers, crop rotation, species diversity among crops, protection of wildlife habitats, and support of family-operated farms. Currently applicable legislation is believed to be unfavorable to some of these objectives and needs modification.

scholarly journals Long-Term Effects of the Use of Organic Amendments and Crop Rotation on Soil Properties in Southeast Spain

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2363
Author(s):  
Antonio Sánchez-Navarro ◽  
Juan Sánchez-Martínez ◽  
Eva María Barba-Corbalán ◽  
Magdalena Valverde-Pérez ◽  
Aldara Girona-Ruíz ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Carbon Sink ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Soil Management ◽  
Degradation Process ◽  
Long Term Effects ◽  
Forage Maize ◽  
Maize Cultivation

The evolution of soil chemical properties over 20 years was monitored to assess the effects of the change in soil management from a rainfed to an irrigated model and the use of organic amendments and crop rotation. Intensive agriculture has been the activity that has caused most degradation and contamination of this soil. Long-term monitoring of the soil profile made it possible to assess its response to the application of sustainable agricultural techniques intended to offset these effects. Three profiles of the same soil were studied—P1 (1998), P2 (2003), P3 (2017)—to show the evolution in time and space. An incipient degradation process was detected in the first five years, verified by increases in salinity (2.3 dS m−1), exchangeable Na (0.5 g kg−1), and TN (1.3 g kg−1) in P2 in comparison with P1 (1.0, 0.2, and 1.1, respectively). There was also leaching towards the deep horizons for TN (0.4, 0.9, and 0.7 g kg−1 for P1, P2, and P3, respectively), and for assimilable elements such as P (1.1, 6.4, and 3.8), Fe (2.0, 2.1, and 5.6), Mn (0.3, 6.5, and 1.9), Zn (0.3, 0.5, and 0.9), and Cu (0.5, 0.6, and 1.3) (all mg kg−1, for P1, P2, and P3, respectively). Between 2004 and 2017, organic amendments (sheep manure) were reduced by 50%, crop rotation was intensified, and green fertilization and forage maize cultivation were included. As a result, P3 showed an improvement in comparison with P2, with decreases in EC (1.4 dS m−1), exchangeable Na (0.2 g kg−1), and TN (0.8 g kg−1). The change in soil management enhanced some soil functions (carbon sink and chemical fertility) and attenuated soil degradation.

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