Both Statement 1 and Statement 2 are true.

Statement 1: Eucalyptus trees are commonly planted in Haryana's wastelands for afforestation and land rehabilitation.

True:
Eucalyptus trees are widely planted in Haryana's wastelands as part of afforestation programs. These trees are chosen for their fast growth, adaptability to degraded soils, and economic value (timber and pulpwood).

• Eucalyptus helps in stabilizing soil in wasteland areas and contributes to increasing greenery.
• It is also part of state-level efforts to make unproductive lands more economically viable.

Statement 2: Kikar and Jand trees are naturally adapted to Haryana's semi-arid climate and sandy soil conditions.

True:

• Kikar (Acacia nilotica): A thorny, drought-resistant tree that thrives in arid and semi-arid climates like those of Haryana. It grows well in sandy soils, making it suitable for much of the state.
• Jand (Prosopis cineraria): Known as the "Tree of the Desert," Jand is another hardy tree native to arid regions. It survives in extreme conditions, stabilizes soil, and provides shade, fodder, and fuel.
  These trees are naturally adapted to Haryana's climate and play a crucial role in the ecosystem by preventing soil erosion and supporting local biodiversity.

Why the Other Options Are Incorrect:

a) Only Statement 1 is true:
Incorrect, because both eucalyptus plantations and native trees like Kikar and Jand are prevalent and significant in Haryana.

b) Only Statement 2 is true:
Incorrect, as eucalyptus plantations are an established practice for rehabilitating wastelands in Haryana.

d) Neither Statement 1 nor Statement 2 is true:
Incorrect, as both statements are accurate representations of Haryana’s vegetation and land-use practices.

Conclusion:

Both statements are correct. Eucalyptus is used for afforestation in wastelands, and Kikar and Jand are native species naturally adapted to Haryana's semi-arid environment.

Hence, Option C Is Correct.

Eucalyptus

In Haryana, eucalyptus trees are widely planted along highways and in wastelands. This is a common practice for several reasons:

1. Fast Growth:
   Eucalyptus is a fast-growing tree, making it an ideal choice for roadside plantations. It quickly provides greenery and shade, which are essential for improving the aesthetics and reducing the temperature near highways.

2. Low Maintenance:
   Eucalyptus trees require less maintenance compared to many other tree species. They are drought-resistant and can thrive in a variety of soil types, making them suitable for Haryana's semi-arid climate.

3. Wasteland Utilization:
   Eucalyptus is often planted in wastelands to make productive use of these areas. It helps prevent soil erosion and can contribute to land rehabilitation.

4. Economic and Environmental Benefits:
   Eucalyptus wood is valued for timber, paper, and pulp production. Additionally, the trees absorb carbon dioxide, contributing to environmental benefits such as improving air quality.

5. State-Specific Suitability:
   Haryana has limited natural vegetation due to deforestation and urbanization. Eucalyptus has been introduced as a quick and effective solution to increase tree cover along highways and open spaces. It aligns well with the state's efforts to promote afforestation.

However, eucalyptus has also been criticized for certain ecological concerns. It tends to consume large amounts of water, which may not be ideal for water-scarce regions like Haryana. Despite this, it remains a popular choice for plantation along highways due to its numerous practical benefits.

Hence, Option B Is Correct.

Salvadora

Haryana’s vegetation is largely shaped by its semi-arid climate, low rainfall, and human interventions like agriculture and afforestation. Among the native tree species, Salvadora is considered a dominant and important species in the state, especially in arid and semi-arid regions. Here's a detailed explanation:

1. Salvadora (Salvadora persica):

Adaptability to Haryana's Climate:
Salvadora thrives in semi-arid and dry regions, which are prevalent across much of Haryana. It is drought-resistant and can tolerate high salinity, making it suitable for the state's conditions.

Common Names:
Known as the "Toothbrush Tree" or "Piloo," Salvadora has multiple uses in traditional medicine and as a source of food and fodder.

Ecological Role:

• It prevents soil erosion in sandy areas, stabilizing the soil with its extensive root system.
• Salvadora provides shelter and food for wildlife, especially in dry and less fertile regions.

Economic Importance:

• The tree's berries are edible and sometimes used to make pickles.
• Its branches are used as natural toothbrushes (miswak) due to their antibacterial properties.

2. Why Not the Other Options?

a) Oak:
Oak trees are primarily found in hilly regions with cooler climates, such as Himachal Pradesh and Uttarakhand. Haryana's climate and soil do not support oak growth naturally.

c) Deodar:
Deodar (Cedrus deodara) is a coniferous tree that grows in higher altitudes and colder regions, such as the Himalayan foothills. It is not native to Haryana.

d) Mango:
Mango trees are common in orchards across Haryana, but they are cultivated rather than part of the dominant natural vegetation. Salvadora is a better representative of Haryana's native and dominant vegetation.

3. Haryana's Natural Vegetation Context:

Haryana's natural vegetation consists mostly of drought-resistant and spiny trees like Kikar (Acacia nilotica), Jand (Prosopis cineraria), and Salvadora. These species are adapted to the state's semi-arid conditions and play a significant ecological and economic role.

Conclusion:

Salvadora is a dominant tree species in Haryana due to its adaptability to arid conditions, ecological importance, and multiple uses. Unlike other species in the options, it is native and naturally suited to the state's environment.

Hence, Option B Is Correct.