Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I

Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I Question Answer and select need one. Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I Notes Download PDF. AHSEC Class 12 Elective Agriculture and Floriculturist Question Answer English Medium.

Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Elective Agriculture and Floriculturist Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 12 Agriculture and Floriculturist Chapter 1 Cultivation of Commercial Flower Crops — I Textbook Solutions English Medium for All Chapters, You can practice these here.

Cultivation of Commercial Flower Crops — I

Chapter: 1

Session 1: Cultivation of China Aster

Check Your Progress

A. Fill in the Blanks: 

1. For China aster cultivation, ____________ soil is best with a pH range of ___________. 

Ans: Sandy loam, 6.8 – 7.5.

2. In China aster application of FYM, _____________ tonnes and ____________ NPK kg/ha are found beneficial. 

Ans:  10–15, 120:80:120.

3. Individual flowers are harvested for making ____________ and _______________. 

Ans: Garlands and worshipping.

4. China aster is commonly propagated by _______________. 

Ans: Seed.

5. For commercial cultivation of China aster, the seed rate requirement is _________________ kg/ha.

Ans: 2.5–3.0.

B. Multiple Choice Questions:

1. Optimum temperature range required for China aster during the day and night is — 

(a) 20–30oC and 15–17oC.

(b) 30–35oC and 17–19oC. 

(c) 25–35oC and 13–15oC. 

(d) 35–40oC and 19–21oC. 

Ans: (a) 20–30oC and 15–17oC.

2. China aster can be planted at ______________ cm spacing. 

(a) 20 × 20 or 35 × 35 

(b) 25 × 25 or 40 × 40 

(c) 35 × 35 or 50 × 50 

(d) 30 × 30 or 45 × 45 

Ans: (d) 30 × 30 or 45 × 45

3. Normal growing season of China aster is ____________________. 

(a) June–July and October–November.

(b) February–March and July–August. 

(c) May–June and September–October. 

(d) November–December and April–May.

Ans: (c) May–June and September–October. 

4. Yields of China aster is about ____________ tonnes/ha loose flowers. 

(a) 14–16 

(b) 18–20 

(c) 20-22 

(d) 22–25 

Ans: (b) 18–20 

5. A serious insect pest of China aster is — 

(a) Aster beetle (Epicauta pennsylvanica). 

(b) Leafhopper (Macrosteles fascifrons). 

(c) Tarnished plant bugs (Lygus lineolaris). 

(d) Root aphid (Anuraphis maidi-radicis).

Ans: (a) Aster beetle (Epicauta pennsylvanica). 

C. Subjective Questions:

1. Define pinching in aster. 

Ans: This is an important practice in some varieties of China aster for getting precocious flowering. Pinching of main shoot at one month after transplanting in variety ‘Ostrich Plume Purple’ gave a significant increase in the number of nodes, branches, flowers, and flower yield but delayed the flowering by 8–12 days.

2. Name any five varieties of China aster.

Ans: Kamini, Poornima, Phule Ganesh Pink, Phule Ganesh Purple, Phule Ganesh Violet, Phule Ganesh White, Shashank, and Violet Cushion are Indian bred varieties.

3. Describe propagation of China aster.

Ans: Plants of China asters are commercially propagated through seeds and for one hectare of planting, 2.5–3.0 kg seed is required which is first sown in the nursery and then transplanted. Seeds in the nursery are sown during September–October, and seedlings are transplanted when they attain a height of 10 cm, in about a month.

4. Write about planting and transplanting of China aster.

Ans: In and around the Bengaluru region, the crop can be grown throughout the year, though main seasons are May–June and September–October. In the subtropical regions such as Delhi, its sowing time is September–October, and transplanting is done in October–November, whereas in the temperate regions in the country the seeds in the nursery are sown in September while transplanting is done during October.

D. Match the Columns:

A	B
1. Stunting of the plants	(a) Pellicularia filamentosa.
2. Gray mould	(b) Very active at 20oC temperature.
3. Stem rot	(c) Nematodes control.
4. Foliage nematode	(d) Root-knot nematode.
5. Furadan at 1g/m2	(e) Botrytis cinerea.

Ans:

A	B
1. Stunting of the plants	(d) Root-knot nematode.
2. Gray mould	(e) Botrytis cinerea.
3. Stem rot	(a) Pellicularia filamentosa.
4. Foliage nematode	(b) Very active at 20oC temperature.
5. Furadan at 1g/m2	(c) Nematodes control.

Session 2: Cultivation of Chrysanthemum

Check Your Progress

A. Fill in the Blanks:

1. Pinching in chrysanthemum is done by ________________ of the growing tips of the plants at ______________ stage. 

Ans: Hand removal, 10–15 cm.

2. Standard chrysanthemum is harvested when ____________ but before ___________________ begins to elongate. 

Ans: Fully open, central disc.

3. Chrysanthemum is commonly known as ________________ or _________________. 

Ans: Queen of East or Autumn Queen.

4. Chrysanthemum flowers, which have invisible disc, are ________________ and ________________. 

Ans: Pompon and decorative.

5. Chrysanthemum can be commercially propagated by ______________ and _______________ cuttings.

Ans: Suckers and terminal. 

B. Multiple Choice Questions:

1. The critical day length required for flower initiation and flower development of chrysanthemum is — 

(a) 14–15 hours and 13–14 hours. 

(b) 11–12 hours and 12–13 hours. 

(c) 10–11 hours and 9–10 hours. 

(d) 16–17 hours and 15–16 hours. 

Ans: (a) 14–15 hours and 13–14 hours. 

2. Chrysanthemum can be grown on the soil pH of about — 

(a) 7.5 

(b) 6.5 

(c) 5.5 

(d) 4.5 

Ans: (b) 6.5 

3. Terminal or tip cuttings of ____________________ for chrysanthemum should be taken from a healthy stalk. 

(a) 7–10 cm.

(b) 10–15 cm. 

(c) 5–8 cm. 

(d) 15–20 cm.

Ans: (c) 5–8 cm.

4. ___________ are used to control the outside growth of heavy bloomers pots plants of chrysanthemum. 

(a) 7–10 stakes. 

(b) 10–12 stakes. 

(c) 1–2 stakes. 

(d) 3–5 stakes. 

Ans: (d) 3–5 stakes.

5. Removal of suckers from the base of chrysanthemum is known as ______________ . 

(a) De-suckering. 

(b) Pinching.

(c) Stopping. 

(d) Disbudding and de-shooting. 

Ans: (a) De-suckering.

6. ____________ is the removal of the growing tips of plants at 10–15 cm stage which results in the production of several lateral shoots. 

(a) De-suckering. 

(b) Pinching or stopping. 

(c) Disbudding. 

(d) Topping.

Ans: (b) Pinching or stopping.

Session 3: Cultivation of Tuberose

Check Your Progress

Session 4: Cultivation Technique of Gladiolus

Check Your Progress

Session 5: Cultivation Technique of Carnation

Check Your Progress

Session 6: Cultivation Technique of Gerbera

Check Your Progress