Question

In the early days of farming, people did not understand how
plants obtained essential nutrients. It so happened that wood ash.
fish remains and slaughterhouse waste were thrown on vacant
land just to get rid of them. Then, people started to notice that the
grass, bushes and shrubs on this vacant land began to grow very
well. They reasoned that if their farmland were similarly treated,
the growth of their crops would also improve. People gradually
began to realize that the nutrients required by plants came from
the soil and that the amount of nutrients could be increased by the
application of such organic remains to the soil. Thus started the
manuring process in farming.
The practice of manuring has been practised as early since the
seventeenth century. However, the importance of manuring was not
properly understood until scientists began to study the nutritional
needs of plants and gave birth to fertilizers. Thus, gradually, the
use of fertilizers became accepted by farmers. There are many
types of manure and fertilizer currently being used. Manure is a
substance derived from animals and plants. The most important
advantage of using manure is the fact that they not only supply
a wide range of plant nutrients, but also improve the structure
of the soil. It cements together the soil particles to form soil
crumbs. The crumb structure is a desirable condition of cultivated
soil. The addition of manure to soil will increase the inorganic
and humus content which helps to prevent soil erosion and loss
of plant nutrients when it rains. The common manure used in
farming consists of farmyard manure, compost, blood meal, bone
meal and fish meal.​

Answer 1

Answer:

nice question