depends on the soil, current crop and the previous crop, ground cover. For example, farmers grow beans/legumes because they are nitrogen fixers. This reduces t

depends on the soil, current crop and the previous crop, ground cover. For example, farmers grow beans/legumes because they are nitrogen fixers. This reduces the need for fertilisers later on. However does mean that you might bot be able to grow as profitable crop in that time. Soil health also comes into it. An allotment will be a shittone more productive per unit area than high grade arable land