The prickly pear weed $(Opuntia) $ bacame a menace and it has been successfully controlled by

Consider the following four statements $(A – D)$ related to organic farming and select the correct option stating which ones are true $(T)$ and which ones are false $(F)$. The statements :

$(A)$ Produces food crops rich in lipids, vitamins and iron
$(B)$ Uses biofertilisers which increases soil fertility
$(C)$ There is more use of chemical fertilisers and pesticides
$(D)$ Raising unpolluted crops through the use of bacteria, fungi and cyanobacteria

Stramonium is a drug obtained from the plant species of

Nitrogen content of urea is

The conc. of pesticide require to destroy $ 50\%$  of pest is called