WEED CONTROL, PART 2, TSP PART 9

WEED MANAGEMENT, TSP PART 9, WEED CONTROL PART 2

WEBSITE: DIY ORGANIC GARDEN

Pre-emergent cultivation/ blind cultivation.

“The point of blind cultivation is to stir the top half inch of soil, adding air and causing the millions of tiny germinating weed seeds to dry out and die. The larger crop seeds are below the level of the cultivation and remain undamaged. Weed seedlings are at their most vulnerable at this stage. Effective blind cultivation will give you the biggest possible crop/weed size differential.” Rodale Institute

Other methods, such as timing can reduce weeds such as “Ohio organic grain farmer Dean McIlvaine waits until May or even early June to put in his corn crop. At this time the soils are warmer and plants grow more quickly, out-competing weeds. A delayed planting also gives McIlvaine time to make an extra trip with a disk or field cultivator to kill more germinating weeds.”

 Vegetative and synthetic mulches

“Mulches can be very effective at controlling weeds. Mulch changes the environment around the soil surface, making it difficult for weed seeds to germinate and grow. Vegetative mulches, such as rye straw, can also suppress weeds by allelopathy. Research shows that rye mulch can reduce weed seed germination by 75 to 95% while leaving large-seeded crops such as corn, peas, cucumbers or beans unaffected.   

Natural or non-synthetic mulches such as straw or leaves can have the additional benefit of boosting soil organic matter over time, and even adding fertility. Be careful whenever you import mulch (or compost) materials such as leaves, loose straw or grass clippings that you avoid potential contaminants or debris. Avoid glossy inks from newspaper inserts and magazine waste.

"Living mulches" are cover crops of clover, grasses or other species used to suppress weeds in orchards and some other types of cropping systems. These can be mowed regularly or seasonally to maintain the stand.”  Taken from Rodale Institute Organic Transition

“Livestock: Intensive rotational grazing is widely recognized for its effectiveness in limiting perennial weeds in pasture. But in some specialized systems, farmers have developed additional ways to use livestock for weed management. Chickens confined to small pens and rotated through fields have been shown to be effective at eradicating yellow nutsedge. Geese preferentially eat grasses, and so can be used to weed strawberry fields without damaging the crop. Some tree-crop farmers use sheep to graze the alleys between rows of trees or coffee bushes.” Organic transition, Rodale Institute

Research at the Rodale Institute, moreover, “has shown that organic crops actually have a greater ability to tolerate weeds than non-organically managed crops do. In almost 30 years of side-by-side trials, our organic plots have consistently yielded as well as our non-organic plots, even though the organic plots usually have heavier weed pressure. It may be that the organic crops suffer less competition from weeds because soil quality is better, making nutrient and water resources more plentiful.”

NonGMO base synthetic material is acceptable in Organic production but Organic farmers must prove that the two methods of

1. Cultural(crop rotation, sanitation, seed variety) Mechanical or physical (exclusion, beneficial insect habitat, lurs, traps, repellants, mulches, flame)
2. Natural biological, botanical or mineral inputs

did not work and it must be documented to prove they were ineffective.

It all goes back to soil health and conservation planning.  Know your weeds and which crops, cover crops and rotation cycles are needed to control the problems.

A good video put out by ATTRA not only addresses crop rotation but weed control in doing it. Youtube video  Organic Crop Rotation: Conservation Benefits

Additional standards (material/information) for crop rotation section IV eFOTG Conservation Practices,

·        Alley Cropping (311),

·         Conservation Crop Rotation,

·        Cover crop Standard (340)

"How To" Organic Gardening: WEED CONTROL, TSP Part 8

"How To" Organic Gardening: WEED CONTROL, TSP Part 8: WEED MANAGEMENT, PART 1, TSP PART 8 WEBSITE: DIY ORGANIC GARDEN Weed and pest management if always of major concern to all gardener...

WEED CONTROL, TSP Part 8

WEED MANAGEMENT, PART 1, TSP PART 8

WEBSITE: DIY ORGANIC GARDEN

Weed and pest management if always of major concern to all gardeners/farmers/ranchers.  Organic Gardeners and prohibited from using synthetic mean of destroying pests and weed so other methods are developed to reduce or control weeds and pests.

.The code governing weed and pest control is 205.206.  To review; these regulations are in the Code of federal regulations, Title 7: Agriculture, PART205—NATIONAL ORGANIC PROGRAM, SubpartC—Organic Production and Handling Requirements

§ 205.206   Crop pest, weed, and disease management practice standard.

(a) The producer must use management practices to prevent crop pests, weeds, and diseases including but not limited to:
(1) Crop rotation and soil and crop nutrient management practices, as provided for in §§ 205.203 and 205.205;
(2) Sanitation measures to remove disease vectors, weed seeds, and habitat for pest organisms; and
(3) Cultural practices that enhance crop health, including selection of plant species and varieties with regard to suitability to site-specific conditions and resistance to prevalent pests, weeds, and diseases.
(b) Pest problems may be controlled through mechanical or physical methods including but not limited to:
(1) Augmentation or introduction of predators or parasites of the pest species;
(2) Development of habitat for natural enemies of pests;
(3) Nonsynthetic controls such as lures, traps, and repellents.
(c) Weed problems may be controlled through:
(1) Mulching with fully biodegradable materials;
(2) Mowing;
(3) Livestock grazing;
(4) Hand weeding and mechanical cultivation;
(5) Flame, heat, or electrical means; or
(6) Plastic or other synthetic mulches: Provided, That, they are removed from the field at the end of the growing or harvest season.
(d) Disease problems may be controlled through:
(1) Management practices which suppress the spread of disease organisms; or
(2) Application of nonsynthetic biological, botanical, or mineral inputs.
(e) When the practices provided for in paragraphs (a) through (d) of this section are insufficient to prevent or control crop pests, weeds, and diseases, a biological or botanical substance or a substance included on the National List of synthetic substances allowed for use in organic crop production may be applied to prevent, suppress, or control pests, weeds, or diseases: Provided, That, the conditions for using the substance are documented in the organic system plan.
(f) The producer must not use lumber treated with arsenate or other prohibited materials for new installations or replacement purposes in contact with soil or livestock.

Listed in the eFOTG, section IV, Conservation Practices

NATURAL RESOURCES CONSERVATION SERVICE, CONSERVATION PRACTICE STANDARD is

CONSERVATIONCROP ROTATION(Acre)CODE 328

A part of that code is: Additional Criteria to Manage Plant Pests (Weeds, Insects, Diseases).  Design the crop sequence to break pest life cycles and/or to allow for the use of a variety of control methods. Remove susceptible crops and alternate host crops from the rotation for the period of time needed to break the life cycle of the targeted pest.

Resistant varieties, listed in appropriate university publications or other approved sources, shall be selected where there is a history of a pest problem

This simply mean that planting the same “family” of crops in the same place year after year will promote additional pests and weeds.  By creating a “new environment” through crop rotation weeds can be suppressed and controlled.

“Reducing the weed seed bank in your soil is important. Some weeds can produce as many as 100,000 seeds per plant, with the seed remaining viable for 40 years or more.”

From: Weed Management for Organic Crops (.pdf file) (University of California, Division of Agriculture and Natural Resources, 2000).

It was found that the common field mouse can consume over 40% of the weed seeds produced in a field and by provide a habitat for these natural creatures you have an natural predator working 24/7 on reducing your weed problem.

“Iowa State University researchers have found that weed predation by field mice can reduce weed seed populations by 40% in just one night. Maintaining unmown, biodiverse borders around your fields provides habitat for the mice and provides you with some free weed-control service.

Free weed-control service: Mice

The first thing is to identify your weeds.  An essential part of reducing your weeds come from identification, how they grow, what they need to grow, how they propagate.  Identify your weeds and you identify ways to reduce or eliminate them

Weedsof the Northeast, by Richard Uva, Joseph Neal and Joseph DiTomaso (Cornell University Press, 1997).

Weeds of the West, by Tom Whitson (Western Society of Weed Science, 2000).

Common Weed Seedlings of the North Central States (North Central Regional Extension Publication No. 607)

Two inexpensive weed manuals relevant nationwide are Common Weeds of the United States, originally published by the USDA in 1970
 All About Weeds, by Edwin Rollin Spencer (both available from Dover Press). See the box at right for some good regional guides.

Most state extension offices give away short weed-identification guides or bulletins. Those that focus on weed seedling identification are particularly useful. You can also access weed identification tools online:

UC Davis Weed ID Photo Gallery

Weed Science Society of America

NRCS Plants Database

"How To" Organic Gardening: COVER CROP-NOP/TSP PART 7

"How To" Organic Gardening: COVER CROP-NOP/TSP PART 7:   TSP COVER CROPS AS MULCH, P art 7 TSP WEB SITE: DIY ORGANIC GARDEN NOP: 205.205 AND 205.203  We have investigated rotating ...

COVER CROP-NOP/TSP PART 7

 TSP COVER CROPS AS MULCH, Part 7 TSP

WEB SITE: DIY ORGANIC GARDEN

NOP: 205.205 AND 205.203 

We have investigated rotating crops and their value now we will look at cover crops and their value.

Planting crops that you kill either by “winter kill” or deliberate kill can add great value to weed control, moisture control and nutrient value.

Cover crops that are planted with the intent to leave on the ground give a Gardner all three advantage of rotating crops.  Winter kill cover crops can be rotated under in the Spring or left in the field with the intended cash crop planted without tilling.  This is a new method in farming primarily developed by the Rodale institute and they call it organic NO-till. 

A cover crop is planted in the fall or early spring with the intention of killing the crop and leaving it on the ground for its mulch advantages. 

 

“No-till farming techniques have gained great popularity over the past two decades as growers seek new ways to protect and conserve their soil and save time and money. No-till production allows farmers to save all three because it reduces or eliminates the need to till fields for planting or weed cultivation.  One of the key elements of our organic no-till research is a front-mounted cover-crop roller that knocks down a weed-suppressing mat that can be planted through all in one quick pass.” Say Jeff Moyer, Rodale Institute

An example of cover cropping is when winter wheat or rye is planted after harvest in the fall, left to grow with the winter climate "killing" the crop hopefully before in seeds.  In the spring, the farmers plants their money crop without tilling the ground.  Thus leaving the root system of the winter kill in place which starts the degrading process and in turn all to microbial activity.

Another example is to plant a crop in the fall or early spring with the intentions of "killing" that crop just before planting the cash crop.  This method lays down a layer of mulch (crimping or rolling) which protects the ground from the hot sun, gaining  added moisture.  The killed crops starts the decaying process which generate additional microbial growth and nutrients as well as "shading out" or suppressing weeds.  The cash crop is planted into the ground with the "kill" crop still in place.  The best way to understand this is to look at some examples of cover cropping. 

A YouTube video demonstrates the roller process.

This is a picture of the Roller at work at the Rodale Institute and they also have plans for creating your own. 
Sometimes a planter is on the back of the tractors so that rolling and planting are done in one sweep saving bio fuel and time.

The University of Oregon has a pdf guide of “Cover crops for Home Gardeners” 

Cereal Rye coming up in October in harvested corn field.  Courtesy of the NRCS, cover crops

Cover crop of cereal rye that was killed a few months earlier with soybean planted.  This inhibits the growth of weeds, keeps in the moisture and provide nutrients.  Farmers have report high yields in drought years using this method when neighboring farmers were loosing crops to the drought. Courtesy of the NRCS, cover crops

See more pictorials of Cover Cropping at DIY Organic Garden and Pinterest NOP Cover Crop

"How To" Organic Gardening: CROP ROTATION example PART 6

"How To" Organic Gardening: CROP ROTATION example PART 6: Crop Rotation Example1 part six TSP WEBSITE: DIY ORGANIC GARDEN .NPK -Even if all of these are present in adequate amounts plants ...

CROP ROTATION example PART 6

Crop Rotation Example1 part six TSP

WEBSITE: DIY ORGANIC GARDEN

.NPK -Even if all of these are present in adequate amounts plants sill need other nutrients to develop into healthy plants and produce healthy vegetable/fruits.

Lets take tomatoes for an example:

Tomatoes need: NPK, calcium, magnesium, sulfur, iron zinc, boron and copper

Ca = calcium

Mg=magnesium

B=boron

Zn=zinc

Fe=iron

Cu=copper

W=tungsten

S=sulfur

N=nitrogen

P=phosphorus

K= Potasium

PH for most garden needs to be between 5.5 and 7; somewhat acidic but not too much; 7 is neutral below 7 is considered acidic.  Above 7 denote alkaline and the higher the more alkaline.  Soil PH determines the chemical processes that take place and specifically affect the ability of pail to absorb nutrients.  The more balanced or neutral your soil PH is the better your plants can take up the nutrients they need.

Adding the micronutrients or trace nutrients needed are a little more difficult than NPK which are considered the macronutrients.  Apparently no studies have been done on which plants add most of these trace nutrients.  Low PH is usually an indication that the trace nutrients are in low quantities.  PH of tomatoes needs to be between 6.0 and 7.0.

For this year if you have not done cover cropping or crop rotation the following is some aids for adding the trace nutrients.  In the future you will save time, money and labor to start a regiment of rotating your crops or adding cover crops.

For calcium add dolomite or gypsum or limestone to raise the PH levels.  Egg shells and Milk can also be added around the plants.

For magnesium add one tablespoon on Epson salts per gallon of water and use as a foliar spray before the tomatoes flower.  I spray my tomatoes about once every two weeks if I see they need it during the growing season making sure I spray at dusk so foliage is dry before the sun comes out the next day. 

For Iron add lime or blood meal

 TABLE of elements 

Tomatoes need a minimum of seven other nutrients and minerals, in smaller amounts, to grow robust and healthy. Since all plants obtain their nutrients from the soil they are planted in, the preparation is essential to providing tomatoes with proper amounts. These "micronutrients" consist of calcium, magnesium, sulfur, iron, zinc, boron, and copper. Most of these are needed in very small amounts. Both overfeeding and starving your plants of these secondary compounds will result in highly undesirable effects.

Rotating crops for Tomatoes example:  the numbers for deletion nutrient comes for the Crop calculator I shared with you in Blog 5 or you an refer to a chart I made of the vegetable I have in my garden using that chart on my web site under NOP .. Charts    Vegetable depletion  

ROTATION SCHEDULE
PLANT	year	DEPLETED		add	depleted	add	depleted	add
		Nitrogen			Potassium		K-Potash
tomato	2012	0.1535			0.0283		0.2567
winter wheat	winter 2012			NR				K	W, TS
corn	2013	0.2832			0		0
beans	late 2013	0.1835		N	0.0305	P	0.1411	B	B, SS
pumpkins	2014	0.2412			0.0367		0.2593
cowpeas	winter 2014			N		P			W, TS, B
B=harbors beneficial insects
SS=Open sub soil
W=weed suppress
TS= mellow top soil
NR=takes up and hold soilable soil

A rotation schedule needs to be made for each vegetable you plant.  At the very least do not plant the same vegetable in the same spot year after year.  Even with a small garden rotate out you vegetable and try a winter kill crop for adding more nutrient.  This charting take a little time but once done very easy to continue.