Answers

2015-11-17T19:35:31+05:30
Using bio fertilisers and manures such as compost .
taking good care of them.
growing them at proper depths and distances . etc.
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2015-11-17T21:40:48+05:30
1.plant breeding technique:it consists of four steps
a.introduction
b.selection
c.hybridization
d.recombinant 
2.use of fertiliizers and pesticides
3.improved irrigation facility
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