Crop Science And Agronomy

(a) Economic Uses of Linseed:
- Linseed (Linum usitatissimum) is a valuable oilseed crop with several applications.
- It is a rich source of Omega-3 fatty acids, making it important for edible oil production.
- The oil extracted from linseed is commonly used in the manufacturing of paints, varnishes, and printing inks.
- Linseed cake, which is high in protein, serves as animal feed.
- The fiber from linseed plants is utilized in producing linen fabric and paper.
(b) Aftercare in Potato Cultivation:
- Irrigation: Potatoes require regular watering every 7-10 days to support proper tuber development.
- Weeding and Earthing Up: Weeds should be regularly removed, and soil should be heaped around the plants (earthing up) to keep the tubers covered.
- Pest and Disease Control: Fungicides like Mancozeb are used to control late blight (Phytophthora infestans).
- Fertilization: The application of potassium and phosphorus helps in enhancing tuber quality.
(c) Harvesting of Chilli Crop:
- Chilli crops are ready for harvest 90-120 days after transplanting.
- The crop is harvested in stages as chillies mature at different times.
- Fully ripe, red chillies are picked manually.
- The harvested chillies are then sun-dried for 7-10 days to reduce moisture content and increase shelf life.
(d) Short-term Storage of Onions:
- Onions should be stored in a well-ventilated, dry environment to prevent rotting.
- Ideal storage conditions include 50-60% humidity and temperatures around 25°C.
- Onions must be cured before storage by drying them in the shade for 10-15 days.
- Storing onions in mesh bags or ventilated wooden crates helps prevent fungal infections.
(e) Characteristics of a Good Cropping Scheme:
- Maximizes land efficiency through proper crop rotation.
- Ensures high yields and profitability.
- Incorporates soil fertility management with practices like green manuring and organic farming.
- Utilizes intercropping to boost overall production.
- Helps minimize soil erosion and conserve moisture.
(f) Importance of Oilseeds in Indian Farming:
- Oilseed crops like mustard, soybean, and groundnut play a crucial role in India’s agricultural economy.
- These crops provide raw materials for edible oils, biofuels, and various industrial products.
- Some oilseeds, being nitrogen-fixing, contribute to improving soil fertility.
- They generate employment in the processing industries.
- India is one of the top producers of oilseeds, reducing reliance on imported edible oils.

(a) Harvesting and Yield of Lucerne:
Lucerne, a perennial forage crop, is harvested at the 10 percent flowering stage for optimal yield and nutritional value.
The first cut is typically made 60-70 days after sowing, followed by subsequent cuts every 25-30 days.
- Average yield: 80-100 tons of green fodder per hectare annually.
- The harvested crop is shade-dried to preserve its nutritional content before storage or feeding to livestock.
(b) Rayungan Method of Sugarcane Planting:
Practiced primarily in Maharashtra, this method involves planting whole sugarcane stalks horizontally in deep furrows or trenches, as opposed to using setts.
- The soil is lightly covered, and irrigation is provided to support germination.
- This method promotes a stronger root system, better moisture retention, and increased productivity.
- It is particularly beneficial in water-scarce areas.
(c) Curing of Ginger:
Curing is the process of reducing excess moisture from freshly harvested ginger rhizomes, enhancing their storage life and quality.
- Curing process steps:
- Thoroughly wash and clean the rhizomes.
- Shade-dry them for 2-3 days to remove moisture.
- Treat them with lime water or Bordeaux mixture to prevent fungal infections.
- Cured ginger retains a stronger aroma and longer shelf life, making it ideal for export.
(d) Pune Method of Jowar Cultivation:
This method, specific to Maharashtra, uses paired-row planting for enhanced aeration and better sunlight penetration.
- The crop is planted with rows spaced 30-45 cm apart, with wider gaps between the pairs.
- This method increases yield by optimizing photosynthesis and reducing competition for nutrients.
- It is best suited for rain-fed conditions.
(e) Farm Records (Only Names):
- Crop Record - Livestock Record - Machinery Record - Financial Record - Weather Record - Input-Output Record
(f) Pod Borer of Gram:
The pod borer (Helicoverpa armigera) is a major pest affecting gram crops.
- It damages pods by feeding on developing seeds, leading to 20-30% yield loss.
- Control measures include:
- Use of resistant varieties.
- Biological control using it{Trichogramma} parasitoids.
- Application of neem-based pesticides and insecticides like Chlorpyrifos or Spinosad.