How can understanding more about agricultural practices society?

There will always be a need for food. It is an unquestionable necessity many sadly go without. There is more to agriculture than planting a seed and watering it. There are plant genetics and biochemistry which go into producing common food products. There is more to agriculture than milking cows. There are precise measurements and machines needed to obtain the most and best product, in any field of agriculture. Agriculture also encompasses veterinary science and aquaculture (farming live fish). It is a complex process which provides the world with answers to how and why their food gets to their dinner table the way it does.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.