$A$: Barley,sorghum,and millet are smother crops.
$R$: They favor the growth of some common weeds.

Which crops are affected by diseases caused by nematodes?

$A$ system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

Read the following statements carefully and select the correct ones:
$(1)$ The wheat variety $Atlas$ $66$ has high protein content.
$(2)$ $SCP$ is an alternative source of protein for human and animal nutrition.
$(3)$ Plants developed through micropropagation are genetically different from the parent plant.
$(4)$ Semi-dwarf rice varieties were derived from $IR-8$ and $Taichung$ $Native-1$.

Majority of people suffer from protein,vitamins and micronutrient deficiencies. Their food does not contain essential micronutrients specially:
$I$. iron
$II$. iodine
$III$. zinc
$IV$. vitamin-$A$
Which of the above are correct?

Millions of chickens were killed in West Bengal,Assam,Orissa,and Maharashtra recently. What was the reason?