What is the recommended depth to take a sample for a field crop?

What is the recommended depth to take a sample for a field crop? For cultivated crops and gardens, sample at 0 – 1″ and another at 1 – 6″ depth. For lawns and pastures, a sample from the upper 6″ is satisfactory; remove plant residue. For tree and fruit crops, 2 samples should be submitted, … Continue reading What is the recommended depth to take a sample for a field crop?