According to the Soil survey of Pakistan, the total waterlogged summer-rain area in the country is:________?

The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:________?

Who gave the formula for coefficient of velocity of germination?

The spreading habit of the crop caused by insect which makes cultivation, weeding and harvesting more difficult is process of________?

Which element is known as chemical police man of plant?

System for planting banana suckers followed in Sindh is ________?