Field Crops



For field crops take samples from at least 50 plants collected randomly from across the field. Use the chart below to find the right time to sample, as you want your samples to be compared to the standard values.


Recommended Timing and Plant Parts for Tissue Sampling



   Timing  Plant Part
 Corn  3-5 leaf stage silking  Whole plant (zinc & phosphorus only) middle third or ear leaf
Soybeans First flowering Top fully developed leaf (3 leaflets + stem)
Cereals At heading Top 2 leaves
Forages Late bud Entire above ground portion
Edible beans First flowering Top fully developed leaf (3 leaflets + stem)
Potatoes Early, mid or late season Petiole of 4th leaf from tip
Tomatoes Early bloom Petiole of 4th leaf from tip
Broccoli, cauliflower Start of head formation Midrib of young, mature leaf
Cabbages At heading Midrib of wrapper leaf
Carrots Mid-growth Petiole of young, mature leaf
Celery Mid-growth Petiole of newest elongated leaf
Lettuce At heading Midrib of wrapper leaf
Onions Minimum of 3 times per season Tallest leaf
Spinach Mid-growth Petiole of young, mature leaf
Sugar beets 12 weeks Youngest mature leaf
Tree fruits Last two weeks of July Fully expanded leaves from mid-point of current year's growth
Blueberries Mid August Fully expanded mature leaves, including petioles
Grapes September 1-15 Petioles (leaf stalks) from leaf opposite bunch
Raspberries Recently matured Fully expanded leaves
Strawberries Late June for fruiting
Mid August for non fruiting plantings		 Fully expanded recently matured leaflets only (discard petiole)
Tobacco At topping 10th leaf from top


Leaf & Plant Tissue Analysis
SAA9  
Nitrogen (N), Calcium (Ca), Phosphorus (P), Potassium (K),Magnesium (Mg), Sodium (Na), Iron (Fe), Copper (Cu), Manganese (Mn), Zinc (Zn) and Boron (b)
 

Please contact the laboratory for additional tests and prices.
Please enclose payment with samples

Effective August 20, 2015