MANAGING FERTILITY IN HAY & PASTURE GROUND Jennifer Jensen - PowerPoint PPT Presentation

MANAGING FERTILITY IN HAY & PASTURE GROUND Jennifer Jensen University Of Idaho Extension Bonner County

CONTENT • Soil Sampling • Soil Test Results • Nutrient Recommendations • Organic Fertilization - Manures

SOIL SAMPLING

SOIL SAMPLING

Grass Pasture 1 Grass Pasture 2

NUTRIENT REMOVAL

Grass Pasture 1 Grass Pasture 2

Grass Pasture 1 Ammonia N – 2.4 Nitrate N – 1.3 Grass Pasture 2 Ammonia N – 2.4 Nitrate N – 1.3

PRECIPITATION Bonners Ferry – 20-29inches (24.5 inch average) Sandpoint – 28-37 (33 inch average)

Grass Pasture 1 Available P – 2.9 Grass Pasture 2 Available P – 0.58

Grass Pasture 1 Available K – 270 Grass Pasture 2 Available K – 39

Grass Pasture 1 Sulfate S – 3.5 Grass Pasture 2 Sulfate S – 2.4 Photo: Nutri-Facts - IPNI - International Plant Nutrition Institute http://anz.ipni.net/ipniweb/region/anz.nsf/0/ABFA1A5619972D 2ACA257D4600093601/$FILE/NutriFacts-NA-4.pdf

ALFALFA SOIL REPORT

NITROGEN • At seeding, applying 30 to 35 pounds of fertilizer N per acre • Excessive levels of inorganic in soils will promote invasion by grassy plant species and also reduce nodulation and the quantity of N fixed by the alfalfa crop. • Excessive soil acidity and soil pH values less than 5.8 for alfalfa can disrupt N fixation. (soil test pH=5.8)

PHOSPHOROUS Available P – 2.3

POTASSIUM Available K – 65

SULFUR Sulfate S – 10

BORON Boron – 0.83 Treat a soil testing less than 0.5 ppm of B with 1 to 1.5 pounds of B per acre. Do not exceed B application rates of 2 pounds per acre. Photo: CIS 1085 Boron - University of Idaho

ORGANIC FERTILIZER 4-3-3

Soil test interpretations and fertilizer management for lawns, turf, gardens and landscape plants Carl J. Rosen, Peter M. Bierman and Roger D. Eliason Univ. of Minnesota Extension

QUESTIONS