In Recent Years,a Soil Test for Nitrogen Has Been Developed

Multiple Choice

In recent years,a soil test for nitrogen has been developed and widely used in humid regions in predicting how much nitrogen will need to be applied to supplement natural mineralization in the soil.This test is called the _______.

A) Mehlich II nitrogen test
B) Differential Nitrate Extraction Test (DNET)
C) diagnosis and recommendation integrated system (DRIS)
D) pre-sidedress nitrate test (PSNT)
E) soil nitrogen partial analysis (SNPA)