What does the term "percolation" refer to in relation to water movement in soil?

Alkali soils appear black due to

The alkaloid present in young sorghum leaves which caused sorghum poisoning is ____

Botanical name of barley is-

Estimate the percent moisture in a given SAMPLE:Weight of moist soil+ box= 200 gm Weight of oven dry soil+ box= 160 gm Weight of empty box - 50 gm

Which mechanical measure involves constructing ridges across the slope for reducing runoff erosion and conserving moisture?

The general relative order of Anion exchange is __ ?

Which disease is known as rice fever disease or rich men’s disease?

Which is the type of tillage in which number of tillage operations are reduced to minimum required?