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Table 1   Plant Parts and Number

 

Table 1   Plant Parts and Number of  Plants To Be Sampled for Field Crops at Different Growth Stages

 

 
Crop Growth stage Plant part to sample No. of plants to sample
Alfalfa  Prior to bloom stage Mature leaf blades taken about one-third of the way down the plant 10-15
Barley Prior to heading    The four uppermost leaves  8-12  
Clover Prior to bloom Mature leaf blades taken about one-third of the way down the plant 10-15
Corn Seedling stage All the above ground portion 5-10
  Prior to tasseling The entire leaf fully developed below the whorl 4-6
Cotton  Prior to or at bloom Youngest fully mature leaves on main stem 5-10
Peanuts Prior to or at bloom Mature leaves from main stems 10-15
Rice Prior to heading The four uppermost leaves 8-12
Sorghum Prior to heading Second leaf from top of plant 5-10
Soybean or other beans Seedling stage All the above ground portion 8-12
  Prior to or initial flowering Two or three fully developed leaves at the top of the plant 4-6
Sugarbeets Midseason Leaves midway between younger center leaves and the oldest whorl 10-15
Sugarcane Up to 4 months Third or fourth fully developed leaf from top 5-8
Wheat Seedling stage All the above ground portion 10-15