Arrange these statements in correct sequence of preparation of green
manure.
(a) Green plants are decomposed in soil.
(b) Green plants are cultivated for preparing manure or crop plant parts
are used.
(c) Plants are ploughed and mixed into the soil.
(d) After decomposition it becomes green manure
Fill in the blanks
(a) A total of———nutrients are essential to plants.
(b) ———and———are supplied by air to plants.
(c) ———is supplied by water to plants.
(d) Soil supply———nutrients to plants.
(e) ———nutrients are required in large quantity and called as———.
(f) ——— nutrients are needed in small quantity for plants and are
called ———.
Cultivation practices and crop yield are related to environmental condition. Explain.
Fill in the blanks
(a) Photoperiod affect the————.
(b) Kharif crops are cultivated from————to————.
(c) Rabi crops are cultivated from————to————.
(d) Paddy, maize, green gram and black gram are————crops.
(e) Wheat, gram, pea, mustard are————crops.
Group the following and tabulate them as energy yielding, protein yielding,
oil yielding and fodder crop.
Wheat, rice, berseem, maize, gram, oat, pigeon gram, sudan grass, lentil,
soyabean, groundnut, castor and mustard.
If there is low rainfall in a village throughout the year, what measures will
you suggest to the farmers for better cropping?
Give one word for the following
(a) Farming without the use of chemicals as fertilizers, herbicides and
pesticides is known as ———.
(b) Growing of wheat and groundnut on the same field is called as ———.
(c) Planting soyabean and maize in alternate rows in the same field is called
as ———.
(d) Growing different crops on a piece of land in pre-planned succession
is known as———.
(e) Xanthium and Parthenium are commonly known as———.
(f) Causal organism of any disease is called as ———.
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