Which of the following nutrients is categorised under macro nutrients under the mineral and nutrition classification?

Which of the following is a complex fertilizer?

Toxicity of which element leads to the unavailability of iron and zinc

……………………………. is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present.

The soil colour is determined through Munsell colour chart.  It has three components Hue, Value and Chroma. value represents

Which of the following actinomycetes is responsible for nitrogen fixation?

Which horizon of the soil profile is the zone where dominant features include the accumulation of clay, iron, aluminum, or humus, alone or in combination?

Largest soil order in world is

Example of igneous rock is

Which method measures soil moisture content by drying a sample in an oven and determining the percentage of moisture loss?