Last seen: Jan 25, 2021
Parthenium and Xanthium.
The compost is obtained by decomposition of organic waste like animal excreta, plant waste etc. naturally due to decomposition by bacteria. Vermi-co...
Air - Carbon and oxygen Water - Hydrogen and oxygen
The nutrients required by plants in larger quantity is called macro-nutrients. They are nitrogen, phosphorus, potassium, calcium, magnesium and sulphu...
Nutrients to plants are provided by air, water and soil.
They are (a) no cost production, (b) low cost production and (c) high cost production.
Due to short duration of crop growth, farmers can grow more crops in a year, and reduce the cost of drop production.
By introducing a gene with required characters into a crop for its improvement is called genetically modified crop.
Hybridisation refers to crossing between genetically dissimilar plants, to obtain, better variety of crops.
Wheat and gram.
Paddy and soyabean.
Photoperiod are related to the duration of sunlight required for plant growth.
Berseem, oats or sudan grass are raised as food for the livestock, called fodder crops.
(a) pisciculture
(a) freshwater fish