Alfred M. Blackmer

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Test cornfields for nitrate if manure was not incorporated
Test cornfields for nitrate if manure was not incorporated
Field testing T-22™ Planter Box for corn in Iowa
Should fertilizer nitrogen be applied after injected swine manure?
Corn yields at reduced rates of spring nitrogen in 2001
Should fertilizer nitrogen be applied after injected swine manure?
75/125 N-rate comparison in 2001
75/125 N-rate comparison in 2001
Fall nitrification happened
It is not too late to apply nitrogen for 2001
Corn roots are just reaching anhydrous bands
Soil nitrate concentrations are low this year
Nitrate testing: early versus late spring
Early season losses of nitrogen
Optimal N rates in dry years
Save nitrogen dollars after manure
Soil pH and losses of fall-applied ammonia
Soil pH and losses of fall-applied ammonia
Soil pH and losses of fall-applied ammonia
Is fall nitrogen profitable?
Hold nitrogen on manured cornfields in 2000
Monitoring nitrogen deficiencies in corn
Rescue fertilization following losses of nitrogen
Testing cornstalks for N this fall
Sampling fields for nitrate in late spring
Test cornstalks for nitrate this fall
Visually rating nitrogen sufficiency
Why use the ear-leaf test at silking?
Basics of corn tissue testing
Nitrogen availability from organic fertilizers
What about N credits following soybean?
Nitrogen recommendations for addressing weather
What about yield goals?
Inconsistencies in results of soil nitrate testing
Check N levels in manured cornfields this June
New nitrogen fertilizer recommendations for corn
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