Diversifying Cornfields by Interseeding Cover Crops PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Diversifying Cornfields by Interseeding Cover Crops PDF full book. Access full book title Diversifying Cornfields by Interseeding Cover Crops by Michael Bredeson. Download full books in PDF and EPUB format.
Author: Michael Bredeson
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 324
Get Book Here
Book Description
Author: Michael Bredeson
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 324
Get Book Here
Book Description
Author: Aaron Patrick Brooker
Publisher:
ISBN: 9781085652346
Category : Electronic dissertations
Languages : en
Pages : 331
Get Book Here
Book Description
Farmers could enhance crop diversity in their farming systems by interseeding cover crops in corn in late May and June in corn rotations in the Upper Midwest. Recommendations must be developed for cover crop species, seeding rates, and interseeding timings that optimize cover crop growth and enhance corn production. Weeds must be controlled, and cover crops must establish in this system. Cover crops influence soil health in long term studies; however, the influence of interseeded cover crops on soil enzymes, soil structure, and nutrient cycling has not been reported. In Michigan, two experiments were conducted from 2015-2017 and one experiment from 2017-2019. In the first experiment, annual ryegrass, crimson clover, oilseed radish and a mixture of the three species were broadcast interseeded at each of the V1 through V7 corn stages at a single seeding rate. Cover crop and weed density and biomass were measured during the growing season, at the time of corn harvest, and the following spring. Soil samples were taken in the spring in the year following interseeding and analyzed for inorganic N, extracellular enzyme activity, and aggregate stability. Corn was planted as an indicator crop and sampled for C and N content. In the second experiment, preemergence (PRE) and postemergence (POST) herbicides were applied, and cover crops interseeded at the V3 and V6 corn stages. Cover crops were evaluated in October for injury and stand loss. A greenhouse trial was also included to evaluate cover crop response to herbicides. In the third experiment, the same three cover crop species and a mixture of annual ryegrass and crimson clover were interseeded at three seeding rates in V3 and V6 corn. Establishment, biomass, and corn grain yield were collected using the same methods as previously described. Eight on-farm locations were interseeded with the same cover crop species at the 1X rate at the V3 and V6 corn stages. All plots were flown with a fixed-wing aircraft to measure canopy temperature. Small-plots were flown with UAV to acquire multispectral imagery to determine NDVI and NDRE. In years with normal or below normal precipitation, annual ryegrass and oilseed radish produced the highest biomass. Establishment improved when seeding on tilled soil compared with no-till soil. All cover crop species established, regardless of tillage, with above normal rainfall. Both annual ryegrass and crimson clover established when interseeded as a mixture at the seeding rates used. Increasing seeding rates usually increased biomass production. Cover crops could be interseeded at any time from V1-V7 corn if weeds were controlled. No cover crop species was competitive with summer annual weeds; annual ryegrass was the only species that overwintered and suppressed winter annual weeds. There were PRE and POST options for weed control with all cover crop species, but farmers must be mindful of herbicide and cover crop combinations. Delaying interseeding until V6 may reduce injury from some PRE herbicides. In the year of interseeding, cover crops did not reduce corn grain yield; therefore, remote imagery was not able to detect changes in corn health. Remote imagery detected cover crop establishment in the V3 interseedings prior to corn canopy closure; remote imagery did not detect less thermal stress where cover crops were interseeded. Annual ryegrass plots had reduced spring inorganic N content, and this sometimes translated to reduced N in the indicator corn crop. Success of broadcast interseeded cover crops is highly depended on adequate precipitation; this practice would be especially successful where summer rainfall is consistent or in irrigated systems. Benefits of cover crops are likely to be realized over multiple years of interseeding; farmers must balance goals of cover cropping with costs of seeding when selecting species, seeding rates, and weed control options.
Author: Daniel H. Smith
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 4
Get Book Here
Book Description
Author: Brent Edward Tharp
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 156
Get Book Here
Book Description
Author: Victoria Leigh Stanton
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
Get Book Here
Book Description
Author: Sue Ellen Johnson
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 372
Get Book Here
Book Description
Author: Ed Peachey
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
Get Book Here
Book Description
Author: Sara Carabajal
Publisher:
ISBN: 9781088341278
Category : Agronomy
Languages : en
Pages : 57
Get Book Here
Book Description
Interseeding cover crops into standing annual crops can promote environmental benefits within agroecosystems. However, seeding method and cover crop diversity may influence biomass production and activity-density of ground beetles (Coleoptera: Carabidae). Carabids abundant in agroecosystems and their granivorous behavior can impact weeds and potentially crops. In a two-year study, six annual cover crop species– planted as either single species or mixtures– were interseeded into standing corn. The seed predation rate of Harpalus, a granivorous carabid, was estimated in a no-choice experiment using weed and crop seed species. Higher crop diversity did not correlate with biomass yield, but cover crop species did. Carabid activity-density was significantly higher later in the season, but was not influenced by diversity or species. Harpalus consumed crop seeds, but preferred weed seed. With further experimentation and analysis, these results can inform farmers in choosing the most effective seeding method and seed type for interseeded cover crop establishment.
Author: Andy Clark
Publisher: DIANE Publishing
ISBN: 1437903797
Category : Technology & Engineering
Languages : en
Pages : 248
Get Book Here
Book Description
Cover crops slow erosion, improve soil, smother weeds, enhance nutrient and moisture availability, help control many pests and bring a host of other benefits to your farm. At the same time, they can reduce costs, increase profits and even create new sources of income. You¿ll reap dividends on your cover crop investments for years, since their benefits accumulate over the long term. This book will help you find which ones are right for you. Captures farmer and other research results from the past ten years. The authors verified the info. from the 2nd ed., added new results and updated farmer profiles and research data, and added 2 chap. Includes maps and charts, detailed narratives about individual cover crop species, and chap. about aspects of cover cropping.
Author: Angela M. Bastidas
Publisher:
ISBN: 9780355684018
Category : Corn
Languages : en
Pages : 0
Get Book Here
Book Description
Fall-seeded cover crops are limited by the short growing season remaining between harvest and planting the succeeding crop. To address this challenge, we considered two alternative systems for introducing cover crops into corn (Zea mays L.)- soybean (Glycine max L.) cropping systems. The first alternative was to interseed the cover crops species with corn at specific developmental stages. We evaluated the effect on corn, cover crop biomass, and the subsequent soybean crop. No detrimental effects on corn were found when cover crops were interseeded at or after corn canopy closure due to the limited cover crop biomass produced during the growing season. However, corn was negatively affected with cover crops interseed at corn planting. Cover crops interseeded at canopy closure did not establish due to corn canopy shading. Cover crops interseeded at or after R5 (dent) produced greater biomass the following spring than in the fall, and cover crops interseeded at R5 and R6 (physiological maturity) produced greater biomass than cover crops interseeded at corn harvest. This indicated that the interseeding by broadcasting cover crops can be successful for improving biomass production. The second alternative was to modify corn management practices such as planting date, plant population, and comparative corn relative maturity (CRM) to allow earlier cover crop seeding dates. We attempted to understand the impact on corn yield, cover crop biomass production, and the subsequent soybean crop. Early- and early-to-medium-maturity hybrids allowed corn harvest about one month earlier and medium-maturity hybrids about 15 d earlier than late-maturity hybrids. No differences in corn yield were observed between the medium- and late-maturity hybrids planted at the earlier planting date, with a 107 CRM hybrid planted early having the highest yield of 16.0 Mg ha-1. The greatest cover crop biomass production occurred with the earliest cover crop planting date. Cover crop biomass increased with air temperature, which was measured with growing degree days (GDDC). This indicates that changes in planting date and corn CRM hybrids are important to increase the potential for use of cover crops. The subsequent soybean yield was not affected by cover crops in either alternative.
