Agronomy - Study Mode

[#956] Optimum temperature for warm season crop ranges between
Correct Answer

(C) 30° - 38°C

Explanation

Solution: "Warm season crop" means a Kharif crop that can withstand the optimum temperature of that area, but they grow well and produce a high yield when the temperature ranges between 30 and 38 degrees Celsius. This season's vegetables and crops require both warm soil and high temperatures. include cucumbers, melons, peppers, tomatoes, squash, etc.

[#957] Phalaris minor is a common weed of
Correct Answer

(D) Wheat

Explanation

Solution: Phalaris minor is a tufted annual bunchgrass up to 1.8 meters in height. It has a spike-like panicle. It is used as fodder or forage for livestock and birdseed. It is a potential contaminant of seed crops. It is a common weed in the wheat crop. It can be controlled by controlled grazing, regular mowing and regular use of weedicide.

[#958] Under drought the sorghum plants synthesize Dhurin in
Correct Answer

(A) Roots

Explanation

Solution: 1. Dhurin Synthesis: Dhurin is a cyanogenic glycoside synthesized by sorghum plants under drought conditions. 2. Location of Synthesis: During drought stress, sorghum plants primarily synthesize Dhurin in their roots . 3. Purpose: Dhurin serves as a defense mechanism for the plant against herbivores and pests. Therefore, the correct answer is Option A: Roots .

[#959] About . . . . . . . . root slips or stem cuttings are required for planting one hectare of land in Napier grass
Correct Answer

(B) 27,800

Explanation

Solution: The scientific name of Napier grass is Cenchrus purpureus. It is also known as elephant grass or Uganda grass is a species of perennial tropical grass native to the African grasslands. It has low water and nutrient requirements also it improves soil fertility and protects against soil erosion. Napier grass is propagated by planting slips or splits. About 800 - 1000 kg which is around 27,800 root slips or stem cuttings is required for planting one hectare of land with Napier grass.

[#960] Seed tuber rate for potato is
Correct Answer

(C) 20 - 25 quintals/hectare

Explanation

Solution: Seed tuber rate refers to the amount of potato seed (in the form of tubers) required to plant one hectare of land. 1 quintal equals 100 kilograms , so this rate defines the total weight of seed tubers needed for proper planting. The recommended seed rate for potatoes varies depending on variety, tuber size, spacing, and intended yield . 20–25 quintals per hectare is the most commonly recommended and agronomically efficient rate for standard varieties and average tuber size. This rate ensures optimum plant population without seed wastage, promoting healthy growth and good yields. Rates lower than this (like 5–15 quintals) may lead to poor stand and low yield, while higher rates (like 25–30 quintals) may be excessive and uneconomical unless used for very small tubers or specific conditions. Therefore, the correct and widely recommended seed tuber rate is Option C: 20 – 25 quintals/hectare.