A sandy soil with 2 percent organic matter typically requires a higher rate of soil-applied herbicide than a clay loam soil with 5 percent organic matter.

• A. True
• B. False

Answer: (B)

The statement is accurate, as sandy soils generally require a higher rate of soil-applied herbicide compared to clay loam soils with a higher percentage of organic matter. Sandy soils tend to have larger particle sizes and lower water and nutrient retention capabilities, which can lead to quicker breakdown and leaching of herbicides. Conversely, clay loam soils, which have finer particles and higher organic matter content, can bind herbicides more effectively. The organic matter can reduce the availability of the herbicide by adhering to soil particles, thus necessitating a lower application rate when using soil-applied herbicides in these types of soils.

In summary, the need for higher herbicide rates in sandy soils is attributed to their lower organic matter content and higher leaching potential, while clay loam soils with more organic matter will require less herbicide due to better retention of these chemicals.