Be aware that the moisture content of the hay will increase overnight when the air is humid, especially if there is dew or fog. Monitor weather forecasts carefully to help schedule haymaking operations. Conditioning equipment which crimps or abrades the crop stems is helpful because it speeds the drying process. Using tedders or hay rakes to very gently fluff windrows may also speed the curing process. Chemicals such as drying agents and preservatives, when properly used, may be advantageous with some crops, such as high quality alfalfa.
Correct application is essential to avoid potential problems.
New hay which is stacked in the field or placed in a barn should be checked frequently for possible heating. At first, check in the morning and afternoon. If no signs of abnormal heating are found, the intervals may be lengthened. Do not place unprotected bales or stacks tightly against each other. Instead, place the bales where air can circulate freely.