DOI: 10.5061/dryad.30qm1
title: Data from: Interplanting annual ryegrass, wheat, oat, and corn to mitigate iron deficiency in dry beans

description: This study evaluated whether grass intercropping can be used to alleviate
 Fe deficiency chlorosis in dry beans (Phaseolus vulgaris L.) grown in high
 pH, calcareous soils with low organic matter. Field studies were conducted
 at the University of Wyoming Sustainable Agriculture Research and
 Extension Center in 2009 and 2010. Black- and navy beans were grown alone
 or intercropped with annual ryegrass (Lolium multiflorum Lam.), oat (Avena
 sativa L.), corn (Zea mays L.), or spring wheat (Triticum aestivum L.) in
 a two-factor factorial strip-plot randomized complete block design. All
 four grass species increased chlorophyll intensity in dry beans. However,
 grass species did not increase iron (Fe) concentration in dry bean tissues
 suggesting inefficient utilization of Fe present in the dry bean tissues.
 In 2009, nitrate-nitrogen (NO3-N) and manganese (Mn) concentration in bean
 tissue were greater in bean monoculture than in grass intercropped beans.
 Bean monoculture also had greater soil NO3-N concentrations than grass
 intercropped treatments. In 2009, grass intercrops reduced dry bean yield
 &gt;25% compared to bean monoculture. Annual ryegrass was the least
 competitive of the four annual grass species. This suggests that
 competition from grasses for nutrients, water, or light may have
 outweighed benefits accruing from grass intercropping. Additional studies
 are required to determine the appropriate grass and dry bean densities, as
 well as the optimum time of grass removal.
description: Soil Test Results for
 2009 PLOSData collected in the
 field in 2009. Column headings include the following: 1) Year – Year that
 study was conducted. 2) Stage: Refers to the stage of dry bean development
 when data was collected including; Plant (Planting Stage) and 2-4TL (two
 to four trifoliolate leaf stage. 3) Bean: Refers to the bean market class
 used in the intercropping treatment plots including B - for black beans, N
 for Navy beans, NONE for when beans were not presents in a plot. 4) Grass:
 refers to grass species used in the intercropping treatment plot including
 R (Annual Ryegrass), O (Oats), C (Corn), W (Wheat), and NONE (when grass
 species was not present in the plot). 5) Rep: refers to replication or
 block number. 5) Salt - Refers to the soluble salt content in ppm. 6) OM -
 soil organic matter content in LOI percentage 7) Zn - soil zinc
 concentration in ppm 8) Fe - soil iron concentration in ppm 8) Mn - soil
 manganese concentration in ppm 9) Cu - soil copper concentration in ppm
 10) NO - soil nitrate nitrogen concentration in ppm.Soil Test Results for
 2010 PLOSData collected in the
 field in 2010. Column headings include the following: 1) Year – Year that
 study was conducted. 2) Stage: Refers to the stage of dry bean development
 when data was collected including; Plant (Planting Stage); 2-4, 4-8, or
 8-16 TL (trifoliolate leaf stage); Flower (flowering stage). 3) Bean:
 Refers to the bean market class used in the intercropping treatment plots
 including B - for black beans, N for Navy beans, NONE for when beans were
 not presents in a plot. 4) Grass: refers to grass species used in the
 intercropping treatment plot including R (Annual Ryegrass), O (Oats), C
 (Corn), W (Wheat), and NONE (when grass species was not present in the
 plot). 5) Rep: refers to replication or block number. 5) Salt - Refers to
 the soluble salt content in ppm. 6) OM - soil organic matter content in
 LOI percentage 7) Zn - soil zinc concentration in ppm 8) Fe - soil iron
 concentration in ppm 8) Mn - soil manganese concentration in ppm 9) Cu -
 soil copper concentration in ppm 10) NO - soil nitrate nitrogen
 concentration in ppm.Tissue Results for 2009
 and 2010 PLOSData collected in the
 field in 2009 and 2010. Column headings include the following: 1) Year –
 Year that study was conducted. 2) Stage: Refers to the stage of dry bean
 development when data was collected including; 2-4 or 8-16 TL
 (trifoliolate leaf stage). 3) Bean: Refers to the bean market class used
 in the intercropping treatment plots including B - for black beans, N for
 Navy beans, NONE for when beans were not presents in a plot. 4) Grass:
 refers to grass species used in the intercropping treatment plot including
 R (Annual Ryegrass), O (Oats), C (Corn), W (Wheat), and NONE (when grass
 species was not present in the plot). 5) Rep: refers to replication or
 block number. 6) Zn – dry bean tissue zinc concentration in ppm 7) Fe -
 dry bean tissue iron concentration in ppm 8) Mn - dry bean tissue
 manganese concentration in ppm 9) Cu - dry bean tissue copper
 concentration in ppm 10) Mo - dry bean tissue molybdenum concentration in
 ppm 11) NO - dry bean tissue nitrate nitrogen concentration in
 ppm.Chlorophyll 2009 and
 2010 PLOSData collected in the
 field in 2009 and 2010. Column headings include the following: 1) Year –
 year that study was conducted. 2) Stage: Refers to the stage of dry bean
 development when data was collected including; 2-4 or 8-16 TL
 (trifoliolate leaf stage). 3) Rep: refers to replication or block number.
 4) Bean: Refers to the bean market class used in the intercropping
 treatment plots including B - for black beans, N for Navy beans, NONE for
 when beans were not presents in a plot. 5) Grass: refers to grass species
 used in the intercropping treatment plot including R (Annual Ryegrass), O
 (Oats), C (Corn), W (Wheat), and NONE (when grass species was not present
 in the plot). 6) Chloro – Chlorophyll intensity in SPAD
 units.Bean Yields 2009 and
 2010Data collected in the
 field in 2009 and 2010. Column headings include the following: 1) Year –
 year that study was conducted. 2) Bean: Refers to the bean market class
 used in the intercropping treatment plots including B - for black beans, N
 for Navy beans, NONE for when beans were not presents in a plot. 3) Rep:
 refers to replication or block number. 4) Grass: refers to grass species
 used in the intercropping treatment plot including R (Annual Ryegrass), O
 (Oats), C (Corn), W (Wheat), and NONE (when grass species was not present
 in the plot). 5) Bean Yield per sub-sample per plot in
 Kg.