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Small Farmer's Journal
PO Box 1627
Sisters, Oregon 97759
800-876-2893
541-549-2064
agrarian@smallfarmersjournal.com
Mon - Thu, 8am - 4pm PDT

A better way to manage phosphorus?

Improvements in science brings improved index

All living things – from bacteria and fungi to plants and animals – need phosphorus. But extra phosphorus in the wrong place can harm the environment. For example, when too much phosphorus enters a lake or stream, it can lead to excessive weed growth and algal blooms. Low-oxygen dead zones can form.

Runoff from agricultural sites can be an important source of phosphorus pollution. To help evaluate and reduce this risk, the USDA first proposed a phosphorus index concept in the early 1990s.

Since then, science progressed and methods improved. In New York State, scientists and agency staff developed and released a phosphorus index in 2003. Now, a new project proposes a restructured index to build on phosphorus management efforts in that state and beyond.

“The idea is to account for the characteristics of a field, and help evaluate the risk of phosphorus runoff from that location,” says Quirine Ketterings. Ketterings is lead author of the new study.

The new index structure improves upon previous approaches. It focuses on the existing risk of phosphorus runoff from a field based on the location and how it is currently managed. Qualities like ground cover, erosion potential, and distance to a stream or waterbody all come into play. The index also highlights best management practices to reduce this risk.

“The new index approach will direct farmers toward an increasingly safer series of practices,” says Ketterings. “Higher-risk fields require more and safer practices to reduce and manage phosphorus runoff.”

Ketterings directs the Nutrient Management Spear program at Cornell University. She and her colleagues used a combination of surveys, computer-generated examples, and old-fashioned number crunching. They used characteristics of thousands of farm fields to develop the new index. Involving farmers and farm advisors was also a key step.

“As stakeholders, farmers and farm advisors are more likely to make changes if they understand why,” says Ketterings. “Plus, they have experience and knowledge that folks in academia and in governmental agencies often do not.”

This field experience can be vital. “Involving stakeholders in decision-making and getting their feedback makes the final product more workable,” says Ketterings. “It may also prevent mistakes that limit implementation and effectiveness.”

Ketterings stresses that the previous index was not wrong, “Farming is a business of continuous improvement and so is science,” she says. “The initial index was based on the best scientific understanding available at that time. Our new index builds and improves upon the experience and scientific knowledge we have accumulated since the first index was implemented. It is likely this new index will be updated in the future as our knowledge evolves.”

The previous index approach could be somewhat time-consuming for planners, according to Ketterings. Further, it didn’t always help identify the most effective practices for farmers. The new approach addresses both of these issues. “We wanted the new index to be practical to use,” she says. “The best index has no value if people cannot or will not implement it.”

In some circumstances of low or medium soil test phosphorus, the original New York state phosphorus index allowed farms to apply manure and fertilizer in what we now consider to be potentially high-risk settings. “The new index approach proposes soil test phosphorus cutoffs and also encourages placing manure below the soil surface,” says Ketterings. “These changes will bring improvements in phosphorus utilization and management across the farm.”

Ketterings also thinks that the new index is more intuitive. “It allows for ranking of fields based on their inherent risk of phosphorus transport if manure was applied,” she says. “It really emphasizes implementing best management practices to reduce phosphorus losses from fields.”

In addition, the proposed index approach could make it easier to develop similar indices across state lines, according to Ketterings. This makes sense, since watersheds don’t follow state boundaries. Growers could use different practices, if deemed appropriate, for different regions.

Read more about Ketterings’ work in Journal of Environmental Quality. Two USDA-NRCS Conservation Innovation Grants funded this project.

Spotlight On: Book Reviews

Art of Working Horses Another Review

Art of Working Horses – Another Review

by:
from issue:

One could loosely say this is a “how-to” book but it is more of an “existential” how-to: how to get yourself into a way of thinking about the world of working horses. Maybe we need to explain what a working horse is. A working horse is one, in harness, given to a specific task. So, in that context, the book illustrates the many ways Miller has worked with his equine partners over the years – helping them understand what he wants them to do, as both work together to create relationships that help achieve desired goals.

Barbed Wire History and Varieties

Book Excerpt: The invention of barb wire was the most important event in the solution of the fence problem. The question of providing fencing material had become serious, even in the timbered portions of the country, while the great prairie region was almost wholly without resource, save the slow and expensive process of hedging. At this juncture came barb wire, which was at once seen to make a cheap, effective, and durable fence, rapidly built and easily moved.

Work Horse Handbook

Work Horse Handbook

Horses are honest creatures. And, what I mean by honest is that a horse is almost always true to his motivations, his needs, his perceptions: if he wants to eat, if he needs water, if he perceives danger. He is incapable of temporarily setting aside or subverting his motivations to get to some distant goal. This is often mistaken as evidence for a lack of intelligence, a conclusion which says more of human nature than equine smarts. What it means for the horse is that he is almost never lazy, sneaky or deceptive. It is simply not in his nature.

Old Man Farming

Old Man Farming

Long after his physical capacities have dwindled to pain and stiffening, what drives the solitary old man to continue bringing in the handful of Guernsey cows to milk?

Basic Blacksmithing Techniques

Illustrated guide to basic blacksmithing techniques, an excerpt from Blacksmithing: Basics For The Homestead.

How To Prune a Formal Hedge

How To Prune A Formal Hedge

This guide to hedge-trimming comes from The Pruning Answer Book by Lewis Hill and Penelope O’Sullivan. Q: What’s the correct way to shear a formal hedge? A: The amount of shearing depends upon the specific plant and whether the hedge is formal or informal. You’ll need to trim an informal hedge only once or twice a year, although more vigorous growers, such as privet and ninebark, may need additional clippings.

Posts

Driving Fence Posts By Hand

Where the soil is soft, loose, and free from stone, posts may be driven more easily and firmly than if set in holes dug for the purpose.

An Introduction To Farm Woodlands

The farm woodland is that portion of the farm which either never was cleared for tillage or pasture, or was later given back to woods growth. Thus it occupies land that never was considered suitable, or later proved unsuitable, for farm enterprises.

Swallow

Rotation As A Means Of Blight Control

Every farmer knows that when a crop is grown on the same field year after year, it becomes inferior in quality and the yield steadily diminishes.

Aboard the Planetary Spaceship

Aboard the Planetary Spaceship

SFJ Spring 2016 Preview: Edward O. Wilson’s new book, Half-Earth: Our Planet’s Fight for Life, offers a plan for the problem of species extinction: the dominant species, man, must hold itself back, must relinquish half the earth’s surface to those endangered. It is a challenging and on the face of it improbable thought, expressed in a terse style. But his phrases are packed because the hour is late.

Storey's Guide to Keeping Honey Bees

Storey’s Guide To Keeping Honey Bees

It is well known that the value of pollination and its resultant seed set and fruit formation outweigh any provided by honey bee products like honey and beeswax.

A Short History of the Horse-Drawn Mower

A Short History of the Horse-Drawn Mower

Book Excerpt: The enclosed gear, late model John Deere, Case, Oliver, David Bradley, and McCormick Deering International mowers I (we) are so fond of had a zenith of popular manufacture and use that lasted just short of 25 years. Millions of farmers with millions of mowers, built to have a serviceable life of 100 plus years, all pushed into the fence rows. I say, it was far too short of a period.

Art of Working Horses

Lynn Miller’s New Book: Art of Working Horses

Art of Working Horses, by Lynn R. Miller, follows on the heels of his other eight Work Horse Library titles. This book tells the inside story of how people today find success working horses and mules in harness, whether it be on farm fields, in the woods, or on the road. Over 500 photos and illustrations accompany an anecdote-rich text which makes a case for the future of true horsepower.

Chicken Guano: Top-Notch Fertilizer

Whoever thought I’d be singing the praises of chicken poop? I am, and I’m not the only one. Chickens are walking nitrogen-rich manure bins.

Farmer Pirates & Dancing Cows

Farmer Pirates & Dancing Cows

From humor-filled stories of a life of farming to incisive examinations of food safety, from magical moments of the re-enchantment of agriculture to the benches we would use for the sharpening of our tools, Farmer Pirates & Dancing Cows offers a full meal of thought and reflection.

Haying With Horses

Hitching Horses To A Mower

When hitching to the mower, first make sure it’s on level ground and out of gear. The cutter bar should be fastened up in the vertical or carrier position. This is for safety of all people in attendance during hitching.

Haying With Horses

Haying With Horses

If the reader is considering the construction of a barn we encourage you to give more than passing thought to allowing the structure of the gable to be open enough to accommodate the hanging of a trolley track. It is difficult or impossible to retrofit a truss-built barn, which may have many supports crisscrossing the inside gable, to receive hay jags. At least allowing for the option in a new construction design will leave the option for loose hay systems in the future.

How To Prune

From Dusty Shelves: Pruning Guide from 1917

Small Farmer's Journal

Small Farmer's Journal
PO Box 1627
Sisters, Oregon 97759
800-876-2893
541-549-2064
agrarian@smallfarmersjournal.com
Mon - Thu, 8am - 4pm PDT