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 Granular
11-52-0 (MAP) and. Fluid 10-34-0 (APP) as
Phosphorus Sources for Irrigated Alfalfa
Scientists
from
Arizona
State
University
compared
fluid
ammonium
polyphosphate
(10-34-0 ) applied in irrigation water with granular monoammonium phosphate (MAP)
broadcast and irrigated into the soil as P sources for high yield alfalfa (8
cuttings per year) and to study movement and availability of P in a calcareous
soil.
Questions
Worth Answering about Your
Soil Testing Program
Most everyone agrees that soil testing makes sense.
But it's also wise to understand the interpretation
approach...for example, sufficiency or build-maintenance...that
is used to convert soil test levels to fertilizer
recommendations. This article, in question/answer
format, tags several points to consider before samples
are sent to the lab and after the results are returned.
Prices
Change-Balanced Fertility Needs Remain the Same
Crop production conditions have certainly changed
over the past few years and will continue to evolve
as we move forward. Sometimes the more dramatic
changes, especially the negative ones, can produce
a measure of shock and consternation. We must remember
though...one thing that doesn't change is the crop's
need for adequate and balanced fertility.
Soybean
Nutrition and Pest Management Implications
It has been widely known for some years that high soil fertility levels and good
plant nutrition lead to higher soybean yields. But did you know that proper plant
nutrition can help reduce susceptibility to incidence and severity of a number
of soybean pest problems?
Nutrient
Placement in Reduced Tillage Systems: Considerations
Nutrient stratification in reduced tillage systems,
along with cooler early spring soil temperatures
and higher soil moisture, can mean profitable crop
responses to banded applications of N, P, and sometimes
K near the seed. Midwest research indicates that
placement of bands deeper in the soil produces
more consistent benefits for K than for P.
Fall-Applied
Nitrogen in the Corn Belt: Questions and Answers
for Corn
Risks involved with fall N application for corn
can be described as logistical, agronomic, environmental,
and economic. This article reviews these factors
based on 2006 conditions.
MAP,
as a Starter Fertilizer for Corn
Monoammonium phosphate (MAP)
and diammonium phosphate (DAP) are excellent sources
of phosphorus (P) and nitrogen (N) for high yield,
high quality crop production.
Potassium
Can Improve Crop Establishment
Dr. A. M. Johnson, Northern
Great Plains Director for PPI/PPIC, reports that
seedbed fertility is important for establishing
a crop. He identifies the specific roles of potassium
in plant growth, such as its role in activating
enzymes, photosynthesis and root growth.
Potassium
and Phosphorus for Quality Alfalfa
Adequate nutrition all
season long is a vital component of high yield/quality
forage production.
Phosphorus
Stratified Soil Management
Reduced tillage systems teamed
with surface applications of fertilizer P often
results in an accumulation of P in the surface
soil and depletion of available P deeper in the
soil profile.
MAP
and DAP Field Study
Summarized by State: Results from 2002 - 2005
Comparisons
of MAP and DAP…a review of literature
by
the P.P.I.
Nitrogen
Nutrition of Cotton
Nitrogen is required in fairly large amounts
by cotton plants. Research findings show that each
acre of high yielding cotton contains as much as
180 pounds of N in the root system and above ground
plant parts.
Corn
and Soybean Response to Nitrogen (N) and Phosphorus
(P)
Yield response of corn to N and P and soybean
response to P has been documented to vary within
and between fields.
High
Yield/Quality Potatoes have High NK Needs
Potatoes are grown in nearly every state in the
U.S. with sales in excess of $3 billion. Yield, tuber
size and specific gravity (dry matter content) influence
quality factors such as frying properties and flavor.
Fertility management decisions can influence these
as well as storage properties.
Nutrient
Needs of Continuous Corn
Some growers are considering
a shift from a corn/soybeans rotation to continuous
corn. More nitrogen (N) will be needed since
soybeans will no longer provide some residual
N.
Magnesium
Nutrition of Cotton
Healthy cotton leaves, stems, and roots will maximize photosynthetic activity
and give the plant the best chance of producing a top yield of quality lint.
With the increased yield potential of faster-fruiting cotton cultivars, particularly
under irrigation, a higher soil fertility maintenance and nutrient supply may
be required in order to keep pace with nutrient uptake needs.
Citrus
Fertilization
According to Drs. Futch, Zekri and Oswalt, Extension Specialists with the University
of Florida, cultural programs, such as fertilization, need to be formalized
to maximize fruit yield and health of citrus trees.
Sulfur
Nutrition of Cotton
Sulfur is an essential component of two amino acids, methionine and cysteine.
These amino acids are key building blocks needed for protein formation in the
cotton plant. Research studies indicate that high yielding cotton will take
up nearly forty pounds of S during the growing season.
High
Analysis Phosphate Sources for Starter Fertilizers
The
menu is a good one. It contains liquid sources
such as the polyphosphates 10-34-0 and 11-37-0
or granular sources such as monoammonium phosphate
(MAP, which is 11-52-0) and diammonium phosphate
(DAP, which is 18-46-0).
Soybean
Nutrient Recommendations
Soil test calibration
research conducted by Dr. Antonio Mallarino with
the Department of Agronomy at Iowa State University
has produced new data for potassium (K).
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