Tag: composting

Organic fertilizer – what is it, what are the rules, where do you buy it?

I get lots of general questions about what to use for fertilizer in organic agriculture. It is generally accepted that compost is good for organic, but does it have to be certified organic compost? What about manure? Can you buy some of these processed fertilizer products? What are the rules for fertilizers?

Click on any link below to scroll down!

  1. 205.203 Soil fertility and crop nutrient management practice standard.
  2. What about some of these organic fertilizers you can buy?
  3. Some newer organic fertilizers – protein hydrolysates
  4. Where do you buy this stuff in bulk?
  5. Other Resources:

205.203 Soil fertility and crop nutrient management practice standard.

The first place to start is with the National Organic Program rules and regulations.

(a) The producer must select and implement tillage and cultivation practices that maintain or improve the physical, chemical, and biological condition of soil and minimize soil erosion.
(b) The producer must manage crop nutrients and soil fertility through rotations, cover crops, and the application of plant and animal materials.
(c) The producer must manage plant and animal materials to maintain or improve soil organic matter content in a manner that does not contribute to contamination of crops, soil, or water by plant nutrients, pathogenic organisms, heavy metals, or residues of prohibited substances. Animal and plant materials include:


First let’s talk about raw animal manure, which must be composted unless it is:
(a) Applied to land used for a crop not intended for human consumption or,
(b) Incorporated into the soil not less than 120 days prior to the harvest of a product whose edible portion has direct contact with the soil surface or soil particles or
(c) Incorporated into the soil not less than 90 days prior to the harvest of a product whose edible portion does not have direct contact with the soil surface or soil particles.

Second on the list is composted plant and animal materials produced through a process. This process involves the mixing of manures generally with some carbon sources like leaves, bark, hay, hulls, etc. to create a product that is:
(a) Establish an initial Carbon: Nitrogen ratio of between 25:1 and 40:1 and
(b) Maintains a temperature of between 131 °F and 170 °F for 3 days using an in-vessel or static aerated pile system or
(c) Maintains a temperature of between 131 °F and 170 °F for 15 days using a windrow composting system, during which period, the materials must be turned a minimum of five times.

Last in this list of NOP materials are Uncomposted plant materials. This is typically what you might call mulches like bark chips, leaves, grass, etc. These are used a lot in perennial crop systems to control weeds and add fertility over time.

As you can see all of these products are from a natural source and that natural source does not have to be a certified organic source. Neither the animals or the plants that you use to make compost or just get raw manure or mulch has to be from an organic farm.

What about some of these organic fertilizers you can buy?

Let’s go back to the rules: A producer may manage crop nutrients and soil fertility to maintain or improve soil organic matter content in a manner that does not contribute to contamination of crops, soil, or water by plant nutrients, pathogenic organisms, heavy metals, or residues of prohibited substances by applying, if you follow these restrictions below.

(a) A crop nutrient or soil amendment included on the National List of synthetic substances allowed for use in organic crop production (click here for that list).
(b) A mined substance of low solubility.
(c) A mined substance of high solubility: Provided the substance is used in compliance with the conditions established on the National List of nonsynthetic materials prohibited for crop production.
(d) Ash obtained from the burning of a plant or animal material, except as prohibited in the list below.
(e) A plant or animal material that has been chemically altered by a manufacturing process: Provided, that the material is included on the National List of synthetic substances allowed for use in organic crop production.

The producer (that is you or any company that makes an organic fertilizer) must not use:
(a) Any fertilizer or composted plant and animal material that contains a synthetic substance not included on the National List of synthetic substances allowed for use in organic crop production.
(b) Sewage sludge (biosolids from a city sewage plant or from a septic tank or a mix of either source with plant material to make a compost).
(c) Burning as a means of disposal for crop residues produced on the operation: Except, That, burning may be used to suppress the spread of disease or to stimulate seed germination. We sometimes do a heat process to “sterilize” a plant material before using. Doubt you will ever need this part!

Some newer organic fertilizers – protein hydrolysates

Protein hydrolysates are increasingly recognized for their role in organic fertilization strategies, offering a sustainable approach to enhance plant growth and soil health. Derived from proteins through hydrolysis, which breaks down proteins into smaller chains of amino acids or even individual amino acids, these products provide a readily available source of nitrogen and other nutrients to plants. This process can involve enzymatic, chemical, or thermal hydrolysis methods, each with its specific advantages and applications.

Nutrient Availability: Protein hydrolysates are particularly valued in organic agriculture for their rapid assimilation by plants. Unlike synthetic fertilizers, these organic nutrients are in forms that plants can easily absorb and utilize, leading to efficient nutrient use and potentially reducing the need for additional fertilization.

Soil Health: Beyond providing nutrients, protein hydrolysates contribute to soil health. They support the growth and activity of beneficial microorganisms, which play a crucial role in soil nutrient cycling, organic matter decomposition, and the suppression of soil-borne diseases. This can lead to improved soil structure, water retention, and fertility over time.

Real Life Example: Consider a scenario where an organic farmer is growing lettuce, a crop that demands a consistent supply of nitrogen for leaf development. By applying a protein hydrolysate-based fertilizer, the farmer can provide a quick-acting source of nitrogen that is readily available for uptake by the lettuce plants. This not only supports the rapid growth of the lettuce but also contributes to the overall soil health by feeding the microbial life within the soil.

Problems? Yes, there are problems with some of these products. Nutrient availability is an issue. We have done experiments, and the product(s) may be slow to work in the plant or the actual nutrients may be lower than stated. This can be caused by a number of factors such as binding to soil or volatilization, but it does mean you need to know your source and product.

Sources: There are just too many to list! This new source for organic fertilizer is great to see but there are a lot of companies getting into this market. Just know that they are not cheap, companies can be far away meaning shipping is a big cost, and you need to know the product well. Please, please be sure that the product you are considering is OMRI approved. Sometimes these blends are with synthetic sources…….

Where do you buy this stuff in bulk?

South Plains Compost

  • PO BOX 190, Slaton, Texas 79364
  • Toll-free: 888-282-2000
  • Office: 806-745-1833
  • FAX: 806-745-1170 
  • Physical Address: 5407 East Highway 84Slaton, Texas 79364

Sigma AgriScience

  •  Office: 281-941-6944
  •  info@sigma-agri.com
  • Corporate Office
    580 Maxim Dr., Boling, TX 77420
  • Boling Plant
  • 2565 FM 1096, Boling, TX 77420
  •  Winnsboro Plant
  • 400 All Star Rd, Winnsboro, TX 75494

Morgan Bulk

  • 3075 FM 1116, Gonzales, Tx. 78629
  • Phone: 830-437-2855
  • Kerry Mobile: 830-857-3919
  • Bobby Morgan Mobile: 830-857-4761
  • Fax: 830-437-2856

7H Nutrients (Pelleted Product)

  • 8063 S US HWY 183, Gonzales, TX
  • Briant Hand
  • Mobile: 830-857-4340
  • 7hhand@gmail.com

Green Cow Compost

Microbes Biosciences (Rhizogen Granular)

Viatrac Fertilizer

Nature Safe Fertilizers

  • 5601 N Macarthur Blvd, Irving, TX, 75038
  • Main Phone: (469) 957-2725
  • Main Fax: (469) 957-2655
  • Rob Borchardt (sales)
  • Mobile: 512-850-7345
  • rob.borchardt@darlingii.com

Organics by Gosh

Earthwise Organics

Ferticell

  • Corporate: (480) 361-1300
  • Sales: (480) 398-8511
  • Fax: (480) 500-5967
  • info@ferticellusa.com
  • 5865 S. Kyrene Rd., Suite 1, Tempe, AZ 85283

True Organic Products

  • 1909 Fairhaven Gateway
  • Georgetown, TX 78626
  • Mobile (737) 403-0064
  • Corporate (831) 375-4796
  • Barret Milam-Regional Sales Representative-Texas
  • bmilam@true.ag
  • true.ag

Other Resources:

Modifications to Increase Vegetable Earliness and/or Yield

Topics Covered in This Article!

  1. Selection of the Land
  2. Selection of Variety
  3. Use Windbreaks
  4. Providing Frost Protection
  5. Use of Row Covers
  6. Plastic Mulch
  7. Transplants
  8. Drip Irrigation
  9. Fertility
  10. Use of Growth-Promoting Substances
  11. Staggered Planting
  12. Resources

Selection of the Land

Light, sandy soils warm up faster than heavier, poorly drained soils. Of course, we don’t always have a choice, but if you are going to spend money on transplants and fertilizer, choose your best land for vegetables. The heat to warm up wet soil 1 degree will heat up dry soil 15 degrees.

Selection of Variety

Check the days to maturity. There is a big difference between many varieties, and this area needs careful consideration. The early variety may not be the best overall, but it can get you into the market earlier, which can be advantageous.

Use Windbreaks

This is perhaps the most important based on work I have done with melons. Windbreaks can decrease time to maturity by a week. Windbreaks are simply plantings with taller plants done weeks or months before your vegetable crop is planted. For example, a rye crop planting in October will be heading out when you plant melons April 1st. The melon crop is stripped into the standing rye.

Providing Frost Protection

In the past, I have worked with growers who went to the trouble and expense to bring in helicopters when an early morning freeze was predicted. It is not unusual to see vineyards with ‘wind machines’ to circulate air when a frost is predicted. Water sprinklers will coat plants with ice which is a freeze protection – sounds crazy I know! Some orchard owners will have bales of hay they set on fire to generate a smoke layer that holds in heat. The basic message is to be prepared if you plant early.

Use of Row Covers

High-value crops like strawberries really benefit from the use of row covers. These can be expensive, so the crop must generate good income to justify the cost. Floating row covers can protect plants from early-season pests and cold temperatures, allowing for earlier planting and faster growth (4 above). These covers can be removed once the danger of frost has passed or may be left on to protect from insect pests.

Plastic Mulch

These increase earliness by warming the soil, conserving moisture, preventing weed problems, and increasing total plant yields. In our Texas soils, plastic mulch can also help keep the plant row from becoming too wet or too dry.

Transplants

Transplants will greatly increase earliness but only if the transplant is healthy and vigorous. You must use organic sourced transplants! Currently we are working to develop better organic transplants and methods for growing transplants in a TDA supported Specialty Crop Grant. Some transplants that have been grown too long in the greenhouse don’t do well in the field so check your source constantly for when they will be ready so you will be ready.

Drip Irrigation

Providing water in small amounts often is the job of drip irrigation. Used with plastic mulch, drip irrigation increases earliness and yield. Drip irrigation is fairly easy to install and relatively inexpensive. You generally need a pressure regulator, filter, hoses or pipes to carry the water and drip tape to deliver to the crop.

Fertility

High levels of nutrients ensure rapid growth and utilization of water and sunlight. Many growers struggle to provide stored nutrients in soil, provide pop-up nutrients at planting, and fertilize with organic nitrogen sources through harvest. Regular soil testing helps determine nutrient deficiencies and allows for proper soil amendment before planting. Balanced soil fertility is crucial for early and vigorous plant growth.

Use of Growth-Promoting Substances

Effect of fulvic acid on yield performance of organic bell
pepper (Capsicum annuum L.) under open‑field conditions
in Tennessee. 2023

Certain growth-promoting substances, like seaweed extracts or microbial inoculants or even Fulvic Acid, can enhance earliness, plant growth and development, potentially leading to earlier harvests.

Staggered Planting

Planting in staggered intervals (planting tomatoes on a 2-week schedule) can help manage for frost losses and increase the harvest window and ensure a continuous supply of produce, allowing entry into the market over a longer period.

Resources