Pregnancy Weight Gain: Facts. 1  For women who were a normal weight before pregnancy with a BMI of 18.5-24.9 the recommended weight gain guideline is 25-35 pounds. 2  Women who are underweight pre-pregnancy with a BMI of less than 18.5 should gain between 28-40 pounds unless your health care provider says differently.
Tilth generally refers to the physical condition of the soil as it relates to plant growth. Favorable tilth implies good conditions for seed germination and root proliferation, allowing crops to thrive.
What is soil made of? Soil is a mixture of rock particles, minerals, decayed organic material, water, and air. Humus âa dark-colored substance that forms as plant and animal remains decay. It has nutrients plants need, making the soil fertile. Fertility. measures how well soil supports plant growth.