Soil is a mixture of rock particles, minerals, decayed organic material, water and air.
From small beginnings, South America grew to greatness because of maize. Just did this and it's correct.
That's an easy one, evporation
The non price determinants of demands:
1.) price expectations
2.) weather/seasons
3.) taste or preferences
4.) income
5.) population
6.) price of related products
Of supply:
1.) technology
2.) cost of production
3.) price expectation
4.) no. of sellers
5.)price of other goods
6.) taxes and subsidies
Salutations!
What percentage of South Africa is exposed to unclean water?
90% of South Africa is exposed to unclean water, in the other hand, 10% of South Africa's water is hygienic and world class.
Hope I helped!