Due to negative nutrient balances as shown in Table 2, the question arises whether organic agriculture methods cause gradual loss of soil minerals. (fao.org)
It's not surprising that a growing, energetic puppy needs different nutrient balance in his diet than a less active senior dog. (dogfoodselector.com)
Students discuss the need to restore nutrient balance in the soil to maintain healthy plants in lesson four. (thescienceofsoil.com)