Production Technology of Cool Season Vegetabl

• V.H. Blackman's Compound Interest Law of Plant Growth (1919):
• Formulated by the plant physiologist V.H. Blackman, who stated:

> "If the rate of assimilation per unit area of leaf surface and the rate of respiration remain constant, and the size of the leaf surface bears a relation to the dry weight of the whole plant, the rate of production of new material, as measured by dry weight, follows the Compound Interest Law."

• Expressed mathematically as:

where $W_1$ is final dry weight, $W_0$ is initial dry weight, $r$ is relative growth rate (efficiency index of dry weight increase), and $t$ is time.

• Correct Option: Option 1 (Compound Interest Law).

• Pink Pulp Pigmentation in Guava (Psidium guajava):
• Pink- and red-fleshed guava varieties (such as Lalit, Arka Kiran, Taiwan Pink, and Ruby) owe their rich pinkish-red internal pulp colouration to the carotenoid pigment Lycopene ($\gt 4 - 7\text{ mg} / 100\text{ g}$).
• In contrast, anthocyanins impart red coloration in apples and strawberries, while xanthophylls impart yellow hues.
• Correct Option: Option 4 (Lycopene).

• Mesophyll Collapse:
• physiological disorder primarily affecting Grapefruit (Citrus paradisi) and sweet orange foliage.
• Cause: Occurs under conditions of high ambient temperature, low relative humidity, and dry wind when transpiration rate exceeds root water uptake, leading to localized water deficit and cellular collapse of the internal spongy mesophyll tissue, producing chlorotic translucent spots that turn necrotic.
• Correct Option: Option 3 (Grapefruit).

• Salt & Alkaline Soil Tolerance in Jamun (Syzygium cumini):
• Jamun is a remarkably hardy indigenous evergreen fruit tree capable of tolerating extreme soil alkalinity up to $\text{pH } 10.0$ and Exchangeable Sodium Percentage (ESP) up to $50 - 60\%$.
• It withstands periodic waterlogging as well as severe sodicity where crops like banana, mango, and jackfruit fail completely.
• Correct Option: Option 1 (Jamun).