A clay soil warms slower than a sandy soil in the spring. An IPM system combines a variety of control mechanism, possibly including pesticides, to control the pest. The first and one of the most important step in IPM is to identify the pest. You do not always have to manage the pest. Ammonium nitrate and potassium sulfate are both synthetic fertilizers.
Organic gardening does allow the use of approved organic pesticides and fertilizers.
Eliminate lists that contain fast release fertilizers. Urea is a fast release synthetic fertilizer commonly used on lawns 17. It determines insect feeding. Stem canker in peas 19. The carbon will provide a food source for soil microorganisms which will obtain nitrogen from what ever is available in the soil.