Dear sir,
Greetings from SAFS Organic!!
proceed the urea&MOP solution it does not harm, but too much of doses will harm your soil please keeep in mind the best way of fertigatio is by using biofertilizers as 3 doses and fym and vermicompost and for crop protection use psudomonas, trichoderma viride, pacilomyces, metaricium etc.,