This document discusses cover cropping practices and their impact on soil nutrient dynamics and fertility. It provides information on how cover crops can minimize nutrient losses from the soil and enhance nutrient cycling processes. Cover crops can uptake nutrients that would otherwise be lost, translocate nutrients from below the crop root zone, and fix nitrogen in the case of legumes. They also increase soil biological activity and populations of beneficial microbes like mycorrhizae. Choosing the right cover crop species is important for achieving specific objectives like grazing, nutrient scavenging, bio-drilling, or weed suppression. The document also notes both positive and negative potential effects of cover crops and strategies for optimizing their growth and nutrient contributions.
Cover Crops Provide Much More than Just CoverRay Weil
This presentation was the Keynote address for the Innovative Farmers of Ontario (Canada) in February 2014. Some slides may not work as well as intended without their animations.
Cover crops for vegetable growers Pam DawlingPam Dawling
Using cover crops to feed and improve the soil, smother weeds, and prevent soil erosion. Selecting cover crops to make use of opportunities year round: early spring, summer, fall and going into winter. Fitting cover crops into the schedule of vegetable production while maintaining a healthy crop rotation
Cover Crops Provide Much More than Just CoverRay Weil
This presentation was the Keynote address for the Innovative Farmers of Ontario (Canada) in February 2014. Some slides may not work as well as intended without their animations.
Cover crops for vegetable growers Pam DawlingPam Dawling
Using cover crops to feed and improve the soil, smother weeds, and prevent soil erosion. Selecting cover crops to make use of opportunities year round: early spring, summer, fall and going into winter. Fitting cover crops into the schedule of vegetable production while maintaining a healthy crop rotation
Soil Health definition and relationship to soil biology
Characteristics of healthy soil
Assessment of soil health
Framework for evaluating soil health
Indicators
Types of indicators
Biological indicators
Role of biological indicators
The portion of a plant left in the field after harvest of the crop that is (straw, stalks, stems, leaves, roots) not used domestically or sold commercially”. The non – economical plant parts that are left in the field after harvest and remains that are generated from packing sheds or that are discarded during crop processing. Organic recycling has to play a key role in achieving sustainability in agricultural production. Multipurpose uses of crop residue include, but are not limited to, animal feeding, soil mulching, bio-manure, thatching of rural homes and fuel for domestic and industrial use. Thus, crop residues are of tremendous value to the farmers. Crop residue benefit the soil physically, chemically as well as biologically.
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This presentation provides an overview of the benefits of cover crops, management considerations, cover crop species for Arkansas and Oklahoma, and the economic benefits of cover cropping.
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Soil Health definition and relationship to soil biology
Characteristics of healthy soil
Assessment of soil health
Framework for evaluating soil health
Indicators
Types of indicators
Biological indicators
Role of biological indicators
The portion of a plant left in the field after harvest of the crop that is (straw, stalks, stems, leaves, roots) not used domestically or sold commercially”. The non – economical plant parts that are left in the field after harvest and remains that are generated from packing sheds or that are discarded during crop processing. Organic recycling has to play a key role in achieving sustainability in agricultural production. Multipurpose uses of crop residue include, but are not limited to, animal feeding, soil mulching, bio-manure, thatching of rural homes and fuel for domestic and industrial use. Thus, crop residues are of tremendous value to the farmers. Crop residue benefit the soil physically, chemically as well as biologically.
Soil degradation in india and solutions, presentation for educational purpose only. Prepared by Nilakshi, Neshab, Manami, Tapan Moran and Biplab Sarma of Dept. Of Env. Scince, Gauhati University
This presentation provides an overview of the benefits of cover crops, management considerations, cover crop species for Arkansas and Oklahoma, and the economic benefits of cover cropping.
This presentation was presented during the 2 Parallel session on Theme 2, Maintaining and/or increasing SOC stocks for climate change mitigation and adaptation and Land Degradation Neutrality, of the Global Symposium on Soil Organic Carbon that took place in Rome 21-23 March 2017. The presentation was made by Ms. Kristine Nichols, from Rodale Institute - USA, in FAO Hq, Rome
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A step-by-step approach to closing the planning circle, so that you can produce crops when you want them and in the right quantities, so you can sell them where and when you need to and support yourself with a rewarding livelihood while replenishing the soil. Never repeat the same mistake two years running!
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MEANING OF AGRICULTURAL PRACTICES
Industry’s Best Practices
Modern Agricultural Equipment’s
Classification of Agriculture
Eight Important Types of world Agriculture
THE EFFECTS OF AGRICULTURAL PRACTICES ON BIODIVERSITY
Agriculture Management
Characteristics Of Sustainable Agriculture
Agricultural Drought
https://www.cda.org.bd/
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Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
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2. Heatmap utilization for testing
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4. Demo
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Orchestrator execution result
Defect reporting
SAP heatmap example with demo
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3. Nutrient losses to
the surrounding
environment …
sometimes exceed
nutrient removal by
harvest
Cover crops are one of many strategies for minimizing losses
4.
5. How many of you are familiar with the 4R concept?
Source matters
Great concept for improving nutrient use efficiency
but where do cover crops fit in?
6.
7.
8.
9.
10. DEAN GLENNEY of Dunville, Ontario plants his corn and
soybeans on exactly the same rows, drives on the same tracks,
and never tills his fields. His Fencerow Farming systems has
produced corn yields averaging 275 bu/ac and soybeans
averaging around 60 bu/ac.
11. “One of the things that pops up immediately in our
analysis is that Mr. Glenney’s plants use up all of
the fertilizer within ~70 days after planting. So in
some way this plant is sucking up all of the
nutrients, but we’re not sure why yet… The other
field still has quite a lot of fertilizer remaining
even at the end of the season. It just doesn’t get
used. One of the fundamental things that’s
happening is in one field the root system must be
more efficient in taking up the nutrients.”
Dr. George Lazarovits
12. The ins and OUTS of root function
H20
N, S, P
Root exudates
activate microbes
Transpirational
stream
H20
Diffusion
Root growth
Outward processes tend
to be underappreciated
Cover crops enhance
outward processes
13. Mycorrhizae - internet of the soil
Mycorrhizae are enhanced by most cover crops
and expand the volume of soil supplying
water and nutrients to crop roots
16. CCs affect many agronomic factors
simultaneously
Control
erosion
Feed
livestock
Cover
Crops
Adapted from Magdoff and Weil (2004)
17. Not all effects are positive
Host
pests
Become
a weed
?
Tie up N
?
Interfere w/
equipment
performance
Suppress
crop growth
Cover
Crops
Prevent
Dry out soil
excessively
soil drying
Add cost
Increase
management
Adapted from Magdoff and Weil (2004)
18. Direct effects of cover crops on nutrient cycling
•Uptake of nutrients that would otherwise be lost:
•Leaching below crop root zone
•losses in eroded soil or runoff
•losses in gaseous form e.g., denitrification
•Translocate nutrients from below crop root zone
e.g., from subsoil to near surface
• Fix N (legumes)
•Release nutrients later—potentially at the time
needed by the next crop
19. Indirect effects of cover crops on nutrient cycling
•Increase overall soil biological activity
accelerating cycling of nutrients contained in soil
organic matter and soil minerals
•Increase populations of specific root symbionts
(e.g. mycorrhiza )
•Create biopores enhancing air and water
movement and root growth and function in
subsequent crops
•Build soil organic matter at soil surface and
throughout soil profile
20. Choosing CC species for specific objectives
Grazing
GRAZING = #1 way to make cover crops pay!
brassicas, clovers, small grains, a. ryegrass, sorghum-sudan
Nutrient scavenging/cycling
brassicas, small grains, annual ryegrass
Bio-drilling
brassicas, sugarbeet, sunflower,
sorghum-sudan sweet clover, alfalfa
N-fixation
clovers, vetches, lentil, winter pea, chickling vetch, sun hemp, cowpea, soybean
Bio-activation/fumigation
brassicas, sorghum-sudan, sun hemp, sesame
Weed suppression
brassicas, sorghum-sudan, cereal rye, buckwheat
21. As we enter a potentially extended period of lower margins
strategies to reduce risk become more important
•Enroll in programs that pay you to plant CCs
•Use time tested CC methods
•Use more than one method of planting CCs
•Plant mixtures/cocktails
•Grow some crops e.g. small grains, vegetables, corn silage,
shorter season hybrids/varieties that are harvested early
•Plan residual herbicide programs carefully
•Scout for insect pests that are attracted to residue
•Irrigate/ fertilize CC
•Capture CC value by grazing
•Adjust cropping system to improve CC performance
•Reduce fertilizer inputs modestly on an experimental basis
22. Some CC innovators have cut back on fertilizer but
> 160 CC
most CC
innovators have
NOT substantially
changed their
fertilizer
programs
23. My students have conducted many
other types of interview projects
It is difficult for research farms to
replicate the careful management
on innovative farms
26. Wheat was harvested and then on August 4th he came back with his
24 row 30" Kinze planter equipped with our Dawn 1572 coulter
combo and milo seed plates. He filled 12 boxes on one side of the
planter with tillage radish seed and the other 12 boxes with Austrian
winter peas.
He doubled back on 15" centers with RTK guidance on his Cat tractor
and ended up with no-tilled alternating rows of tillage radishes and
Austrian winter peas into wheat stubble. No fertilizer was used and
glypho was sprayed right after the August 4th planting to kill any
volunteer wheat. Radish was planted at 2.5 lb/acre and peas at 15
lb/acre
The stand was amazing! The pit showed these huge radishes
breaking up the very hard top soil down to about 24" and into the
subsoil. The tillage needed without bring up the rocks and with low
(zero) hp required!
27. “This customer will strip till into these radishes for corn about
the first of May with his 24 row Pluribus system on a Bauer 60 ft
bar, banding P,K and 1/3 of his N as dry fertilizer with a Montag
cart into the strip. Then come back and side dress the remaining
2/3 of his N with our 6000 on the same Bauer toolbar as liquid
28 or 32%. 30" beans will get fall fertilizer into corn stalks and
spring strip till to give a warm, cleared, fertilized seedbed.
The system these folks are evolving finally came into focus for
me - the parts all fit together: A Wheat-Corn-Bean rotation with
"tillage" done via RADISHES (!!) into the wheat stubble every
third year! All done with a single 60 ft 30" planter, RTK and one
60ft toolbar
I came away from there thinking I have seen the future of
production agriculture, at least in some areas”
28. “This customer will strip till into these radishes for corn about
the first of May with his 24 row Pluribus system on a Bauer 60 ft
bar, banding P,K and 1/3 of his N as dry fertilizer with a Montag
cart into the strip. Then come back and side dress the remaining
This 6000 on the same great toolbar as liquid
system sounds Bauer !
2/3 of his N with our
28 or 32%. 30" beans will get fall fertilizer into corn stalks and
I to give a warm, cleared, fertilized seedbed.
spring strip tillwonder what has been learned
in the past 3 years?
The system these folks are evolving finally came into focus for
me - the partsIs precision planting of CC the rotation with
all fit together: A Wheat-Corn-Bean
"tillage" done via RADISHES (!!) into the wheat stubble every
future or too hard on the planter?
third year! All done with a single 60 ft 30" planter, RTK and one
60ft toolbar
I came away from there thinking I have seen the future of
production agriculture, at least in some areas”
29. We are doing research on bio-strip-till
within an organic context
30.
31.
32. I don’t believe that these effects are
primarily the result of nutrient
uptake by CC because the changes in
K are too large – research is on-going
33.
34.
35. Have you explored all possible options for
bringing grazing animals to your farm to
process CC residues and add value?
Oats, turnips and cereal rye
> 2/3rds of nutrients returned to the soil
36. Optimizing fertility for CC
• Inoculate legumes
• Inoculate non-legumes?
• Fertilize cover crops when
residual fertility is low
41. Because of their deep root system, rapid root
extension, and heavy N feeding, radishes are
excellent scavengers of residual N following
summer crops. Radishes take up N from both the
topsoil and from deeper soil layers, storing the N
in their shoot and root biomass. With favorable
fall growing conditions for 60+ days, radishes
typically take up more than 100 lb/ac of N.
Without available N, radishes grow very poorly
42.
43. Early planting of radish promotes high
biomass production and associated
nutrient accumulation but research at the
University of Maryland has shown that
late planted radishes can still take up
substantial quantities of N despite low
biomass production due to shifts in plant
C:N ratio (Dean and Weil, 2009).
45. Unlike cereal rye and other small grains whose residues
decompose slowly and continue to immobilize N for an
extended period, radish residues decompose and
release N rapidly.
Timely crop establishment following radishes can result
in an early boost in growth and N uptake similar to
following a legume cover crop or N fertilizer application.
In contrast, if planting is delayed and weather/soil
conditions are conducive to leaching or denitrification,
the availability of N scavenged by radishes to
subsequent crops may be limited.
46. Pat Sheridan (Fairgrove, Michigan)
http://talk.newagtalk.com/forums/threadview.asp?tid=73097&mid=521773#M521773
We've done some PSNT tests with and w/o fall seeded radish.
Kind of a moving target (year to year) in N credits, but I will
say that we've always had a bigger credit following radish
than what we had without. That could be for a lot reasons.
Weather, soil types, temp, etc. I've had an increase of almost
80#s of N using radish vs none, and I've had an increase of 20#
vs none.
N credit is a very nice benefit of using a cover like radish, but I
also like the other benefits from radish we've observed.
47. Radish effects on Soil Phosphorus and Potassium
Radishes are excellent accumulators of P and K (root
dry matter commonly contains more than 0.5% P and
4% K), and elevated levels of soil test P have been
measured following radish cover cropping,
particularly within 1–1.5 inches of radish root holes.
Despite radish being a non-host of mycorrhizal fungi,
mycorrhizal colonization of corn following radish does
not appear to be suppressed.
48. Understanding the mineralization of CCs
Early kill date = 114 lbs total N
Early kill date = 107 lbs total N
Late kill date = 131 lbs total N
Late kill date = 140 lbs total N
50% N
2 wks <4 wks
Wagger (1989)
50. N content (%N) is a good predictor of N mineralization
Majority of N mineralization occurs within 4 weeks
PAN = plant
available N
51. Biomass from different CC species but with
similar N content behaves similarly
Higher N content = lower C:N ratio
Same data presented in 2 different ways
52. Only the legumes had net N mineralization during the first 4 weeks
54. Effect of kill date on typical plant available N (PAN) release from cereal,
legume, or mixed stands. Based on compilation of field data from
Willamette Valley cover crop trials. Source: D. Sullivan
55.
56.
57.
58. Crop canopy sensors are
likely to become important
tools for assessing the N
contributions from CCs
59. Frost seeded red clover is the
most time tested method of
integrating a legume CC in
Midwest cropping systems
Wisconsin Integrated Cropping Systems Trial
Hairv vetch
planted after
wheat worked
well in the 2
years out of 9
when the red
clover did not
establish well
What would it
take to get you
to grow some
wheat?