The organic horizon is generally absent from agriculture soils because tilling e.g. plowing, buries organic matter. Why is an organic horizon generlly absent in desert soils?

The organic horizon is generally absent from agricultural soils because tilling, e.g., plowing, buries organic matter. Why is an organic horizon generally absent in desert soils?

soil particles, particularly clay and organic matter in soil , contain negative charges and attract positively charged ions, such as:

State whether the statement is true or false. To sustain themselves, earthworms must guide their way through the soil using their powerful muscles. They gather nutrients by ingesting organic matter and soil, absorbing what they need into their bodies. The two ends of the earthworm can equally ingest soil. a. True b. False

Assertion : Organic agriculature is a production system that sustains the health of the soils, ecosystem and the people. Reason : Organic agriculture relies on ecological processes, biodiversity and cycles adapted to local conditions rather than the use of inputs with adverse effect.

Movement of decomposed, water soluble organic and inorganic compounds from surface to lower layer of soil _____________.

Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements I , ii and iii regarding these and select the correct option. (i) Detritivores (e.g., earthworm) breakdown detritus into smaller particles. (ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts. (iii) Decomposers (e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.

Assertion: Agrolorestry, nutrlent cycllng between species improves and organic matter In the soil is maintained. Reason: Because of the absence of microorganisms, insects, and earthworm in the soil.

The macro nutrient which is an essential component of all organic compounds yet not obtained by plnats from soil is…………..