Agriculture Sciences - ICAR AIEEA (Agronomy & Soil Science)

Crop Production, Soil Fertility & Irrigation Management question bank (Agronomy, Crop Ecology & Soil Chemistry)

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Q1.

Weed Science: In agro-ecosystem weed management in 'Agronomy: Classification of Field Crops, Cropping Systems and Crop Rotations', what does the Critical Period of Weed Competition (CPWC) denote?

(A)

The specific window during crop growth when weeds must be controlled to prevent unacceptable economic yield loss (typically first 30–45 days) (Agronomy: Classification of Field Crops, Cropping Systems and Crop Rotations)

(B)

The period when weed seeds germinate in winter

(C)

The time required for an herbicide to degrade in soil

(D)

The harvest period when weeds die naturally

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Q2.

Soil Chemistry: If a soil sample in 'Agronomy: Classification of Field Crops, Cropping Systems and Crop Rotations' exhibits an Electrical Conductivity ($EC$) of $>4\text{ dS/m}$, Exchangeable Sodium Percentage ($ESP$) of $<15\%$, and $pH < 8.5$, how is it classified?

(A)

Saline Soil (White Alkali) (Agronomy: Classification of Field Crops, Cropping Systems and Crop Rotations)

(B)

Sodic / Alkali Soil ($ESP > 15\%, pH > 8.5$)

(C)

Saline-Sodic Soil ($EC > 4, ESP > 15\%$)

(D)

Normal Agricultural Soil

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